Guide to the Records of Leslie E. Robertson and Associates (LERA): World Trade Center Construction Images
ca. 1969-1973



The Skyscraper Museum
39 Battery Place
New York, NY 10280

Phone: (212) 968 1961

URL: https://old.skyscraper.org

© The Skyscraper Museum. All rights reserved.
The Skyscraper Museum, Publisher

Processed by Sueyoung Park-Primiano and Olga Ganitch.


Machine-readable finding aid derived from a MS Word Document dated: 2005. Machine-readable finding aid created by Brian Stevens. Description is in English.

Descriptive Summary
Creator: Robertson, Leslie E.
Title: Records of Leslie E. Robertson and Associates (LERA): World Trade Center Construction Images
Quantity: images, digitized from original 35mm slides on to 51 CD-ROMs and 31,779 GB
Abstract: The collection incluedes photographic images documenting virtually every step of the World Trade Center’s construction process. The images in this collection were taken mostly by Robertson, but also by various other anonymous photographers.

Arrangement
As well as being saved in the archive’s computer hard drive, the digital images are burned on to 51 CD-ROMs and saved as uncompressed files in TIFF format. A complete list of files on CD-ROM follows the container list below. Images are arranged numerically by accession number. However, the accession numbers are not sequential, and they simply reflect the order of the slide scanned and recorded prior to selection and acquisition.
The collection is organized in one series.
Inventory

Historical/Biographical Note

Leslie E. Robertson was the structural engineer of record for the World Trade Center (WTC). As a partner in the Seattle-based firm of Skilling, Helle, Christiansen and Robertson from 1966 through1973, Robertson worked in New York for his client the Port of New York Authority, later renamed the Port Authority of New York and New Jersey (PANYNJ), collaborating with Port Authority engineers and with the architect Minoru Yamasaki on the design and construction of the WTC complex. During this time Robertson photographed and collected more than 2,810, 35mm slides documenting virtually every step of the World Trade Center's construction process. The images in this collection were taken mostly by Robertson, but also by various other anonymous photographers.

Originally intended for technical and office purposes, these images nevertheless contain a remarkable level of historical detail. They document many of the technical innovations of the architect and engineers and record visits to the construction site and other places of production and testing. They are also, uniquely, a record of the unfolding process of construction of the then tallest and largest buildings in the world seen through the eyes and camera lens of one of the key designers.

In the summer of 2002 The Skyscraper Museum worked with Leslie E. Robertson and Associates (LERA), the structural engineering firm, that is one of the successors of Skilling, Helle, Christiansen, and Robertson, to arrange for the accession and digital capturing of Robertson's slides of the WTC construction. The process began with an initial review and numbering of the collection at LERA. Once the scope of the slide collection was known, Carol Willis, director of The Skyscraper Museum, selected 534 representative images to be digitally captured. These were then assigned a special identifying mark and individually scanned. The digital files were then burned on to archival CD- ROMs for transport to The Skyscraper Museum where they were assigned an accession number, cataloged, and became a part of the Museum collection as a loan with further developing of perpetual rights and reproduction agreement. As a Museum trustee Robertson played a critical role in assisting the Museum staff to identify and caption the images.

The digital images stored on CD-ROMs were copied to the Museum archive computer hard drive, and three digital reference files and service archival files were created according to national standards and specification. These three variants of smaller digital reference and service files were also saved on The Skyscraper Museum's archival computer. The original slide collection is currently housed at LERA office.

In 2005 the digitized images became the centerpiece of the Museum online archive project VIVA2, part of its continuing mission to tell the multifaceted stories of the design and construction skyscraper history.

Scope and Content Note

The LERA collection includes the digital surrogates of the 534 World Trade Center slides spanning approximately 1969 to 1973. The images document the building process from excavation to the topping out event, as well as illustrate innovative design features such as slurry wall construction, bathtub design, tube building design, antenna system, etc. From many angles the images show the work of Favco STD 2700 Tower Cranes purchased in Australia especially for the towers erection. Multiple construction workers and engineers are portrayed at work as well as during preliminary testing. There are also documentary images of the preliminary off-site testing including of material strength and of wind tunnel models. Finally, some of the structural engineering design diagrams and graphs are also included. Some of the slides taken represent photographs of Oregon Research Institute Planar Motion Chamber displaying off-site testing process (photographs are lost, potentially captured before 1969.)

Restrictions

Access Restrictions

Open for research without restrictions.

Use Restrictions

Appointments are necessary for use of manuscript and archival materials. For more information, contact :
The Skyscraper Museum
39 Battery Place
New York, NY 10280
E-mail: [email protected]

Access Points
Subject Names:
Robertson, Leslie E.
Yamasaki, Minoru, 1912-
Subject Organizations:
Port of New York Authority.
Subject Topics:
Blasting.
Engineering analysis.
Foremen.
Harbors.
Inspectors.
Workers.
Subject Places:
Barclay Vesey Building (New York, N.Y.)
Battery Park City (New York, N.Y.)
Brooklyn (New York, N.Y.)
Brooklyn Bridge (New York, N.Y.)
Chrysler Building (New York, N.Y.)
East River (New York, N.Y.)
Empire State Building (New York, N.Y.)
Governors Island (New York, N.Y.)
Hudson River (New York, N.Y.)
Manhattan Bridge (New York, N.Y.)
New Jersey.
North tower.
PATH train tube.
St. Paul's Church (New York, N.Y.)
West Side Highway (New York, N.Y.)
Woolworth Building (New York, N.Y.)
World Trade Center (New York, N.Y.)
Genre Headings:
Antenna
Bathtubs
Beams
Bracing
Cement
Charts, Diagrams, Etc.
Christmas tree
Cladding
Columns
Concrete
Core column
Core steel
Dampers
Drawing
Ductwork
Engineers
Erection stages
Events
Excavation
Façade
Favco STD 2700 Tower Crane
Fireproofing
Floor panel
Floor truss
Floors
Foundation
Glass
Gravel
Hoisting
Interior
Job site
Landfill
Lobby
Machinery
Manitowoc 4000 W Crawler Crane
Mansard
Mast
Materials
Mezzanine
Model
Off-site testing
Panels
People
Piers
Plaza
Pulley
Ramp
Refrigerator plant
Reinforcement bars
Rivers
Riveting machine
Rivets
Roof
Scaffolding
Shanty
Skyline
Slides.
Slurry wall
South tower
Sphere
Steel core
Steel erection machinery
Steel fireproofing
Steelworkers
Street
Structural steel
Testing
Tiles
Timber
Tower crane
Travertine
Tree columns
Views
ViscoElastic Damping System
Wall panels
Welding
Wind pressures

Administrative Information

Provenance

loan as of 2004 per Leslie Robertson.

Preferred Citation

Published citations should take the following form:

Identification of item, date (if known); The Records of Leslie E. Robertson and Associates (LERA): World Trade Center Construction Images; 2004.02; box number; folder number;
The Skyscraper Museum

Processing Information

The arranging and description of this collection was made possible with the support of a Learning Opportunities Grant from the Institute of Museum and Library Services, an independent Federal grant-making agency dedicated to creating and sustaining a nation of learners.

Container List

[The following section contains a detailed listing of the materials in the collection.]

 

Inventory

Item Title Date
1 Favco 2700 Tower Cranes on the North Tower.
Accession number: 2004.02.0003 		undated
   

CD-ROM #: 1
Item Title Date
2 Bathtub.
Accession number: 2004.02.0004 		undated
   

CD-ROM #: 1
Item Title Date
3 Below grade level steel construction of the North Tower
Accession number: 2004.02.0005 		undated
   

CD-ROM #: 1
Item Title Date
4 North Tower, 11th floor.
Accession number: 2004.02.0007 		undated
   

CD-ROM #: 1
Item Title Date
5 Different angle of 2004. 02. 0007.
Accession number: 2004.02.0009 		undated
   

CD-ROM #: 1
Item Title Date
6 Below grade level steelwork and PATH tube.
Accession number: 2004.02.0010 		undated
   

CD-ROM #: 1
Item Title Date
7 Steel construction of the North Tower.
Accession number: 2004.02.0011 		undated
   

CD-ROM #: 1
Item Title Date
8 North Tower, installing floor panel, 10th floor.
Accession number: 2004.02.0013 		undated
   

CD-ROM #: 1
Item Title Date
9 Floor trusses, 10th floor.
Accession number: 2004.02.0014 		undated
   

CD-ROM #: 1
Item Title Date
10 North Tower, 9th floor.
Accession number: 2004.02.0015 		undated
   

CD-ROM #: 1
Item Title Date
11 Core steel construction, North Tower.
Accession number: 2004.02.0017 		undated
   

CD-ROM #: 1
Item Title Date
12 Core steel construction, North Tower.
Accession number: 2004.02.0018 		undated
   

CD-ROM #: 2
Item Title Date
13 North Tower, 9th floor.
Accession number: 2004.02.0019 		undated
   

CD-ROM #: 2
Item Title Date
14 North Tower, 9th floor.
Accession number: 2004.02.0020 		undated
   

CD-ROM #: 2
Item Title Date
15 View to the below grade level construction.
Accession number: 2004.02.0021 		undated
   

CD-ROM #: 2
Item Title Date
16 Below grade level construction.
Accession number: 2004.02.0022 		undated
   

CD-ROM #: 2
Item Title Date
17 Core steel construction, North Tower.
Accession number: 2004.02.0024 		undated
   

CD-ROM #: 2
Item Title Date
18 The action on the image 2004. 02. 0024 continues.
Accession number: 2004.02.0025 		undated
   

CD-ROM #: 2
Item Title Date
19 Hoisting wall panels.
Accession number: 2004.02.0026 		undated
   

CD-ROM #: 2
Item Title Date
20 View to the job site. A view from the 9th floor of the North Tower looking to the west, with activities happening on grade.
Accession number: 2004.02.0027 		undated
   

CD-ROM #: 2
Item Title Date
21 Hoisting floor truss. A 10th floor truss is lifted into place from the 9th floor of the North Tower.
Accession number: 2004.02.0029 		undated
   

CD-ROM #: 2
Item Title Date
22 Hoisting floor truss.
Accession number: 2004.02.0030 		undated
   

CD-ROM #: 2
Item Title Date
23 Hoisting floor truss.
Accession number: 2004.02.0031 		undated
   

CD-ROM #: 3
Item Title Date
24 Hoisting floor truss.
Accession number: 2004.02.0032 		undated
   

CD-ROM #: 3
Item Title Date
25 Installing floor truss.
Accession number: 2004.02.0033 		undated
   

CD-ROM #: 3
Item Title Date
26 Installing floor truss.
Accession number: 2004.02.0034 		undated
   

CD-ROM #: 3
Item Title Date
27 The image follows on from 2004. 02. 0027.
Accession number: 2004.02.0035 		undated
   

CD-ROM #: 3
Item Title Date
28 Hoisting wall panel.
Accession number: 2004.02.0036 		undated
   

CD-ROM #: 3
Item Title Date
29 Job site.
Accession number: 2004.02.0038 		undated
   

CD-ROM #: 3
Item Title Date
30 The North Tower.
Accession number: 2004.02.0043 		undated
   

CD-ROM #: 3
Item Title Date
31 Below grade level construction.
Accession number: 2004.02.0044 		undated
   

CD-ROM #: 3
Item Title Date
32 Different angle of 2004. 02. 0044.
Accession number: 2004.02.0045 		undated
   

CD-ROM #: 3
Item Title Date
33 Different angle of 2004. 02. 0043.
Accession number: 2004.02.0046 		undated
   

CD-ROM #: 3
Item Title Date
34 Different angle of 2004. 02. 0043.
Accession number: 2004.02.0050 		undated
   

CD-ROM #: 4
Item Title Date
35 Two Favco STD 2700 Tower Cranes on the North Tower.
Accession number: 2004.02.0051 		undated
   

CD-ROM #: 4
Item Title Date
36 Below grade level construction of the South Tower.
Accession number: 2004.02.0052 		undated
   

CD-ROM #: 4
Item Title Date
37 Tree columns.
Accession number: 2004.02.0055 		undated
   

CD-ROM #: 4
Item Title Date
38 Different angle of 2004. 02. 0055.
Accession number: 2004.02.0056 		undated
   

CD-ROM #: 4
Item Title Date
39 View of the piers and New Jersey to the west from the inside ofthe South Tower.
Accession number: 2004.02.0057 		undated
   

CD-ROM #: 4
Item Title Date
40 Internal view of one of the lower floors.
Accession number: 2004.02.0059 		undated
   

CD-ROM #: 4
Item Title Date
41 Internal view of one of the lower floors.
Accession number: 2004.02.0060 		undated
   

CD-ROM #: 4
Item Title Date
42 Below grade level construction. Steel is installed to gradenorthwest of the site.
Accession number: 2004.02.0062 		undated
   

CD-ROM #: 4
Item Title Date
43 Materials storage at the job site.
Accession number: 2004.02.0063 		undated
   

CD-ROM #: 4
Item Title Date
44 Installed wall panels facing south.
Accession number: 2004.02.0064 		undated
   

CD-ROM #: 4
Item Title Date
45 Installed wall panels facing south.
Accession number: 2004.02.0065 		undated
   

CD-ROM #: 5
Item Title Date
46 North Tower, 12th floor.
Accession number: 2004.02.0066 		undated
   

CD-ROM #: 5
Item Title Date
47 North Tower, 12th floor.
Accession number: 2004.02.0067 		undated
   

CD-ROM #: 5
Item Title Date
48 A view to the southwest, with installed wall panels.
Accession number: 2004.02.0068 		undated
   

CD-ROM #: 5
Item Title Date
49 A view to the west, with installed wall panels.
Accession number: 2004.02.0069 		undated
   

CD-ROM #: 5
Item Title Date
50 North Tower. Looking north.
Accession number: 2004.02.0070 		undated
   

CD-ROM #: 5
Item Title Date
51 Favco 2700 Tower Crane.
Accession number: 2004.02.0071 		undated
   

CD-ROM #: 5
Item Title Date
52 Favco 2700 Tower Cranes. Looking east. A view of two cranes. Original slide underexposed.
Accession number: 2004.02.0073 		undated
   

CD-ROM #: 5
Item Title Date
53 Favco 2700 Tower Cranes.
Accession number: 2004.02.0076 		undated
   

CD-ROM #: 5
Item Title Date
54 Different angle of 2004. 02. 0076.
Accession number: 2004.02.0077 		undated
   

CD-ROM #: 5
Item Title Date
55 North Tower.
Accession number: 2004.02.0078 		undated
   

CD-ROM #: 5
Item Title Date
56 Core column being installed by steelworkers.
Accession number: 2004.02.0079 		undated
   

CD-ROM #: 6
Item Title Date
57 An internal view of a floor from the core. The floor truss surfacecan be seen around the core, the core itself has no flooring.
Accession number: 2004.02.0081 		undated
   

CD-ROM #: 6
Item Title Date
58 Different angle of 2004. 02. 0081
Accession number: 2004.02.0082 		undated
   

CD-ROM #: 6
Item Title Date
59 The South Tower steel has been installed to grade level. Originalslide extremely underexposed.
Accession number: 2004.02.0085 		undated
   

CD-ROM #: 6
Item Title Date
60 Elevation of the North Tower to approximately 14th floor. Original slide extremely underexposed
Accession number: 2004.02.0086 		undated
   

CD-ROM #: 6
Item Title Date
61 Core of the South Tower. Original slide was underexposed.
Accession number: 2004.02.0089 		undated
   

CD-ROM #: 6
Item Title Date
62 North Tower. Original slide underexposed.
Accession number: 2004.02.0090 		undated
   

CD-ROM #: 6
Item Title Date
63 Elevation of the North Tower up to approximately floor 14looking northwest. Below-grade steel can be seen. Original slideunderexposed.
Accession number: 2004.02.0091 		undated
   

CD-ROM #: 6
Item Title Date
64 Different angle of 2004. 02. 0091. Original slide underexposed.
Accession number: 2004.02.0092 		undated
   

CD-ROM #: 6
Item Title Date
65 Elevation of the North Tower up to approximately floor 14. Original slide underexposed.
Accession number: 2004.02.0094 		undated
   

CD-ROM #: 6
Item Title Date
66 The below-grade steel of the South Tower.
Accession number: 2004.02.0095 		undated
   

CD-ROM #: 6
Item Title Date
67 Below-grade steel of the South Tower.
Accession number: 2004.02.0096 		undated
   

CD-ROM #: 7
Item Title Date
68 Different angle of 2004. 02. 0096.
Accession number: 2004.02.0097 		undated
   

CD-ROM #: 7
Item Title Date
69 Different angle of 2004. 02. 0091.
Accession number: 2004.02.0098 		undated
   

CD-ROM #: 7
Item Title Date
70 Different angle of 2004. 02. 0091.
Accession number: 2004.02.0099 		undated
   

CD-ROM #: 7
Item Title Date
71 Elevation of the North Tower.
Accession number: 2004.02.0100 		undated
   

CD-ROM #: 7
Item Title Date
72 Different angle of 2004. 02. 0100.
Accession number: 2004.02.0101 		undated
   

CD-ROM #: 7
Item Title Date
73 Different angle of 2004. 02. 0091.
Accession number: 2004.02.0102 		undated
   

CD-ROM #: 7
Item Title Date
74 Elevation of the North Tower as seen from the ramp at the southside of the site.
Accession number: 2004.02.0103 		undated
   

CD-ROM #: 7
Item Title Date
75 South Tower steel to grade.
Accession number: 2004.02.0104 		undated
   

CD-ROM #: 7
Item Title Date
76 Detail of core steel.
Accession number: 2004.02.0106 		undated
   

CD-ROM #: 7
Item Title Date
77 Detail of core steel, particularly the rivets.
Accession number: 2004.02.0107 		undated
   

CD-ROM #: 7
Item Title Date
78 Favco 2700 Tower Crane seen from below.
Accession number: 2004.02.0112 		undated
   

CD-ROM #: 8
Item Title Date
79 Steel to grade.
Accession number: 2004.02.0113 		undated
   

CD-ROM #: 8
Item Title Date
80 Different angle of 2004. 02. 0113.
Accession number: 2004.02.0114 		undated
   

CD-ROM #: 8
Item Title Date
81 Elevation of the North Tower. Below-grade diagonal bracingvisible.
Accession number: 2004.02.0115 		undated
   

CD-ROM #: 8
Item Title Date
82 Core steel.
Accession number: 2004.02.0117 		undated
   

CD-ROM #: 8
Item Title Date
83 Core steel.
Accession number: 2004.02.0118 		undated
   

CD-ROM #: 8
Item Title Date
84 The elevation of the North Tower is seen through gradesteelwork.
Accession number: 2004.02.0119 		undated
   

CD-ROM #: 8
Item Title Date
85 Elevation of the South Tower looking east. Slurry wall andvehicle track at bottom of excavation. Original slide underexposed.
Accession number: 2004.02.0123 		undated
   

CD-ROM #: 8
Item Title Date
86 Internal view of lobby showing mezzanine perimeter. HVACductwork is seen stored on the first floor.
Accession number: 2004.02.0124 		undated
   

CD-ROM #: 8
Item Title Date
87 View from internal to the northeast.
Accession number: 2004.02.0129 		undated
   

CD-ROM #: 8
Item Title Date
88 View to the northeast.
Accession number: 2004.02.0131 		undated
   

CD-ROM #: 8
Item Title Date
89 View of Favco 2700 Tower Crane through steel.
Accession number: 2004.02.0133 		undated
   

CD-ROM #: 9
Item Title Date
90 Core steel. Steel cables are wrapped around the core steel.
Accession number: 2004.02.0135 		undated
   

CD-ROM #: 9
Item Title Date
91 Steel wall panels of the South Tower.
Accession number: 2004.02.0137 		undated
   

CD-ROM #: 9
Item Title Date
92 Core steel and wall panels.
Accession number: 2004.02.0138 		undated
   

CD-ROM #: 9
Item Title Date
93 Core steel and wall panels.
Accession number: 2004.02.0139 		undated
   

CD-ROM #: 9
Item Title Date
94 Wall panels.
Accession number: 2004.02.0140 		undated
   

CD-ROM #: 9
Item Title Date
95 Wall panels.
Accession number: 2004.02.0141 		undated
   

CD-ROM #: 9
Item Title Date
96 Core steel and wall panels.
Accession number: 2004.02.0142 		undated
   

CD-ROM #: 9
Item Title Date
97 View to the southwest showing wall panels.
Accession number: 2004.02.0143 		undated
   

CD-ROM #: 9
Item Title Date
98 View to the northeast showing core steel and wall panels.
Accession number: 2004.02.0144 		undated
   

CD-ROM #: 9
Item Title Date
99 Different angle of 2004. 02. 0144.
Accession number: 2004.02.0145 		undated
   

CD-ROM #: 9
Item Title Date
100 Woolworth Building framed between rising steel grids.
Accession number: 2004.02.0146 		undated
   

CD-ROM #: 10
Item Title Date
101 View to the north.
Accession number: 2004.02.0147 		undated
   

CD-ROM #: 10
Item Title Date
102 Floor of the North Tower showing Favco 2700 Tower Crane andwall panels.
Accession number: 2004.02.0148 		undated
   

CD-ROM #: 10
Item Title Date
103 View from the North Tower to grade, showing steel to grade including PATH track tubes.
Accession number: 2004.02.0149 		undated
   

CD-ROM #: 10
Item Title Date
104 View to the southwest showing wall panels.
Accession number: 2004.02.0150 		undated
   

CD-ROM #: 10
Item Title Date
105 Elevation of the South Tower looking upwards to 4th floor andshowing cranes.
Accession number: 2004.02.0151 		undated
   

CD-ROM #: 10
Item Title Date
106 View to east looking at St. Paul's on the left.
Accession number: 2004.02.0152 		undated
   

CD-ROM #: 10
Item Title Date
107 View to the west showing wall panels.
Accession number: 2004.02.0153 		undated
   

CD-ROM #: 10
Item Title Date
108 View to the east.
Accession number: 2004.02.0155 		undated
   

CD-ROM #: 10
Item Title Date
109 View to the northwest showing wall panels.
Accession number: 2004.02.0156 		undated
   

CD-ROM #: 10
Item Title Date
110 View from the North Tower to the South Tower from above,showing tower cranes on the roof.
Accession number: 2004.02.0158 		undated
   

CD-ROM #: 10
Item Title Date
111 View of the South Tower, 4th floor, looking west.
Accession number: 2004.02.0161 		undated
   

CD-ROM #: 11
Item Title Date
112 Elevation of the North Tower showing surrounding steel tograde.
Accession number: 2004.02.0162 		undated
   

CD-ROM #: 11
Item Title Date
113 View of two towers, with piers and New Jersey in thebackground.
Accession number: 2004.02.0163 		undated
   

CD-ROM #: 11
Item Title Date
114 Different angle of 2004. 02. 0161.
Accession number: 2004.02.0164 		undated
   

CD-ROM #: 11
Item Title Date
115 Internal view of the South Tower at 5th floor, showing treecolumns.
Accession number: 2004.02.0166 		undated
   

CD-ROM #: 11
Item Title Date
116 View to the south showing wall panels.
Accession number: 2004.02.0167 		undated
   

CD-ROM #: 11
Item Title Date
117 View to the north showing wall panels.
Accession number: 2004.02.0168 		undated
   

CD-ROM #: 11
Item Title Date
118 Team photo with view to the west showing wall panels.
Accession number: 2004.02.0169 		undated
   

CD-ROM #: 11
Item Title Date
119 View to the north showing wall panels.
Accession number: 2004.02.0173 		undated
   

CD-ROM #: 11
Item Title Date
120 View to the northeast showing wall panels and stacked floortrusses.
Accession number: 2004.02.0174 		undated
   

CD-ROM #: 11
Item Title Date
121 View to the west showing wall panels. Team on site isinspecting.
Accession number: 2004.02.0175 		undated
   

CD-ROM #: 11
Item Title Date
122 Favco 2700 Tower Crane base on an upper floor, with a view tothe west with wall panels in the rear.
Accession number: 2004.02.0179 		undated
   

CD-ROM #: 12
Item Title Date
123 Favco 2700 Tower Crane base on an upper floor.
Accession number: 2004.02.0181 		undated
   

CD-ROM #: 12
Item Title Date
124 Elevation of the South Tower from the east of the site.
Accession number: 2004.02.0183 		undated
   

CD-ROM #: 12
Item Title Date
125 Elevation of the South Tower from the east of the site, with steelto grade over most of the site.
Accession number: 2004.02.0184 		undated
   

CD-ROM #: 12
Item Title Date
126 Work on the site, with two men surveying.
Accession number: 2004.02.0185 		undated
   

CD-ROM #: 12
Item Title Date
127 Elevation of the North Tower, with steam on the side.
Accession number: 2004.02.0186 		undated
   

CD-ROM #: 12
Item Title Date
128 Elevation of the North Tower. Some of the steel has beenpainted. There is a 'Go Mets' banner on the side of the building.
Accession number: 2004.02.0187 		undated
   

CD-ROM #: 12
Item Title Date
129 Different angle of 2004. 02. 0187.
Accession number: 2004.02.0188 		undated
   

CD-ROM #: 12
Item Title Date
130 Scaffolding in the lobby and installation of the wall cladding.
Accession number: 2004.02.0189 		undated
   

CD-ROM #: 12
Item Title Date
131 Internal view of the lobby looking northeast.
Accession number: 2004.02.0191 		undated
   

CD-ROM #: 12
Item Title Date
132 Internal view of the lobby looking east.
Accession number: 2004.02.0193 		undated
   

CD-ROM #: 12
Item Title Date
133 View from a high level floor looking down to the plaza.
Accession number: 2004.02.0194 		undated
   

CD-ROM #: 13
Item Title Date
134 Internal floor after the trusses have been sprayed for thefireproofing work.
Accession number: 2004.02.0195 		undated
   

CD-ROM #: 13
Item Title Date
135 Core of the South Tower.
Accession number: 2004.02.0196 		undated
   

CD-ROM #: 13
Item Title Date
136 Adjacent building.
Accession number: 2004.02.0201 		undated
   

CD-ROM #: 13
Item Title Date
137 View to the northeast, showing parts of buildings on the sitewhich have not been fully demolished.
Accession number: 2004.02.0202 		undated
   

CD-ROM #: 13
Item Title Date
138 Construction below grade level. Not clear which building.
Accession number: 2004.02.0203 		undated
   

CD-ROM #: 13
Item Title Date
139 View from internal to the southwest, showing Battery Park Citylandfill being used for parking.
Accession number: 2004.02.0204 		undated
   

CD-ROM #: 13
Item Title Date
140 North Tower.
Accession number: 2004.02.0206 		undated
   

CD-ROM #: 13
Item Title Date
141 South Tower is constructed to the 47th floor.
Accession number: 2004.02.0207 		undated
   

CD-ROM #: 13
Item Title Date
142 Mechanical floor steelwork.
Accession number: 2004.02.0212 		undated
   

CD-ROM #: 13
Item Title Date
143 Core steelwork and wall panels.
Accession number: 2004.02.0213 		undated
   

CD-ROM #: 13
Item Title Date
144 Core steelwork and wall panels.
Accession number: 2004.02.0215 		undated
   

CD-ROM #: 14
Item Title Date
145 View to the northwest showing core steelwork and wall panels.
Accession number: 2004.02.0216 		undated
   

CD-ROM #: 14
Item Title Date
146 Wall panels.
Accession number: 2004.02.0218 		undated
   

CD-ROM #: 14
Item Title Date
147 Wall panels. The top of the Woolworth Building and the EastRiver can be seen in the background.
Accession number: 2004.02.0220 		undated
   

CD-ROM #: 14
Item Title Date
148 View to the east showing wall panels.
Accession number: 2004.02.0222 		undated
   

CD-ROM #: 14
Item Title Date
149 View to the east showing wall panels.
Accession number: 2004.02.0223 		undated
   

CD-ROM #: 14
Item Title Date
150 View to the north showing wall panels and floor.
Accession number: 2004.02.0224 		undated
   

CD-ROM #: 14
Item Title Date
151 Core steelwork.
Accession number: 2004.02.0225 		undated
   

CD-ROM #: 14
Item Title Date
152 Wall panel against the sky.
Accession number: 2004.02.0227 		undated
   

CD-ROM #: 14
Item Title Date
153 Floor with wall panels.
Accession number: 2004.02.0228 		undated
   

CD-ROM #: 14
Item Title Date
154 View to the south.
Accession number: 2004.02.0229 		undated
   

CD-ROM #: 14
Item Title Date
155 The lower part of the North Tower is seen, with tree columns,cladding started.
Accession number: 2004.02.0230 		undated
   

CD-ROM #: 15
Item Title Date
156 View looking up the North Tower.
Accession number: 2004.02.0231 		undated
   

CD-ROM #: 15
Item Title Date
157 Elevation of the North Tower from the ground level, withcladding at lower levels partially completed. Original slide underexposed.
Accession number: 2004.02.0233 		undated
   

CD-ROM #: 15
Item Title Date
158 Different angle of 2004. 02. 0233.
Accession number: 2004.02.0235 		undated
   

CD-ROM #: 15
Item Title Date
159 View to the north showing wall panels and floor steel.
Accession number: 2004.02.0236 		undated
   

CD-ROM #: 15
Item Title Date
160 Different angle of 2004. 02. 0236.
Accession number: 2004.02.0237 		undated
   

CD-ROM #: 15
Item Title Date
161 View to the east from high floor, showing Brooklyn.
Accession number: 2004.02.0241 		undated
   

CD-ROM #: 15
Item Title Date
162 View to the north showing Empire State Building.
Accession number: 2004.02.0242 		undated
   

CD-ROM #: 15
Item Title Date
163 Showing steelwork at the north of the North Tower.
Accession number: 2004.02.0244 		undated
   

CD-ROM #: 15
Item Title Date
164 View to the north.
Accession number: 2004.02.0246 		undated
   

CD-ROM #: 15
Item Title Date
165 Walking on a beam.
Accession number: 2004.02.0250 		undated
   

CD-ROM #: 15
Item Title Date
166 Different angle of 2004. 02. 0250.
Accession number: 2004.02.0251 		undated
   

CD-ROM #: 16
Item Title Date
167 Top of the South Tower from the North Tower.
Accession number: 2004.02.0256 		undated
   

CD-ROM #: 16
Item Title Date
168 Top of the South Tower from the North Tower.
Accession number: 2004.02.0258 		undated
   

CD-ROM #: 16
Item Title Date
169 View to the south, showing adjacent building with roof garden.
Accession number: 2004.02.0259 		undated
   

CD-ROM #: 16
Item Title Date
170 View to the east, showing adjacent building site.
Accession number: 2004.02.0260 		undated
   

CD-ROM #: 16
Item Title Date
171 Elevation of the North Tower from the ground level.
Accession number: 2004.02.0261 		undated
   

CD-ROM #: 16
Item Title Date
172 Core steelwork, floor panels and pulley.
Accession number: 2004.02.0262 		undated
   

CD-ROM #: 16
Item Title Date
173 Core steelwork and wall panels.
Accession number: 2004.02.0263 		undated
   

CD-ROM #: 16
Item Title Date
174 A piece of timber is clamped to a wall panel.
Accession number: 2004.02.0266 		undated
   

CD-ROM #: 16
Item Title Date
175 View of the South Tower from the North Tower, showing floorsand wall panels.
Accession number: 2004.02.0267 		undated
   

CD-ROM #: 16
Item Title Date
176 View to the southwest, showing Battery Park City reclaimedland.
Accession number: 2004.02.0268 		undated
   

CD-ROM #: 16
Item Title Date
177 Elevation of the North Tower is seen from above.
Accession number: 2004.02.0269 		undated
   

CD-ROM #: 17
Item Title Date
178 View of the South Tower from the North Tower, showing floorsand wall panels.
Accession number: 2004.02.0270 		undated
   

CD-ROM #: 17
Item Title Date
179 Adjacent building.
Accession number: 2004.02.0271 		undated
   

CD-ROM #: 17
Item Title Date
180 Interior of lower building.
Accession number: 2004.02.0274 		undated
   

CD-ROM #: 17
Item Title Date
181 Interior of lower building.
Accession number: 2004.02.0275 		undated
   

CD-ROM #: 17
Item Title Date
182 Interior of lower building.
Accession number: 2004.02.0276 		undated
   

CD-ROM #: 17
Item Title Date
183 Not clear whether WTC or not.
Accession number: 2004.02.0277 		undated
   

CD-ROM #: 17
Item Title Date
184 Elevation of the South Tower from the ground level.
Accession number: 2004.02.0278 		undated
   

CD-ROM #: 17
Item Title Date
185 Elevation of the South Tower from the ground level.
Accession number: 2004.02.0279 		undated
   

CD-ROM #: 17
Item Title Date
186 Different angle of 2004. 02. 0279.
Accession number: 2004.02.0281 		undated
   

CD-ROM #: 17
Item Title Date
187 Cladding at the lower levels of the North Tower.
Accession number: 2004.02.0284 		undated
   

CD-ROM #: 17
Item Title Date
188 The North Tower elevation is seen next to a lower building.
Accession number: 2004.02.0286 		undated
   

CD-ROM #: 18
Item Title Date
189 Lower building.
Accession number: 2004.02.0287 		undated
   

CD-ROM #: 18
Item Title Date
190 Lower building.
Accession number: 2004.02.0288 		undated
   

CD-ROM #: 18
Item Title Date
191 Cladding panels are being installed at the lower level of theNorth Tower.
Accession number: 2004.02.0289 		undated
   

CD-ROM #: 18
Item Title Date
192 Fireproofing has started on the South Tower.
Accession number: 2004.02.0290 		undated
   

CD-ROM #: 18
Item Title Date
193 Elevations of both towers are seen through the steelwork oflower building.
Accession number: 2004.02.0291 		undated
   

CD-ROM #: 18
Item Title Date
194 Steelwork of lower building.
Accession number: 2004.02.0292 		undated
   

CD-ROM #: 18
Item Title Date
195 Distant view of the South Tower at night.
Accession number: 2004.02.0294 		undated
   

CD-ROM #: 18
Item Title Date
196 The South Tower steelwork has been constructed toapproximately the 79th floor.
Accession number: 2004.02.0295 		undated
   

CD-ROM #: 18
Item Title Date
197 Elevation of the North Tower is seen behind the steel of lowerbuilding.
Accession number: 2004.02.0297 		undated
   

CD-ROM #: 18
Item Title Date
198 Distant view of the South Tower.
Accession number: 2004.02.0300 		undated
   

CD-ROM #: 18
Item Title Date
199 Elevation of the North Tower to approximately floor 86.
Accession number: 2004.02.0301 		undated
   

CD-ROM #: 19
Item Title Date
200 View to the southeast.
Accession number: 2004.02.0303 		undated
   

CD-ROM #: 19
Item Title Date
201 View to the north.
Accession number: 2004.02.0305 		undated
   

CD-ROM #: 19
Item Title Date
202 View to the northeast, showing Woolworth Building andapproach to Brooklyn Bridge.
Accession number: 2004.02.0306 		undated
   

CD-ROM #: 19
Item Title Date
203 Standing at the corner with a view to the north.
Accession number: 2004.02.0307 		undated
   

CD-ROM #: 19
Item Title Date
204 View to the northeast showing Brooklyn and Manhattan Bridges.
Accession number: 2004.02.0312 		undated
   

CD-ROM #: 19
Item Title Date
205 Core of the upper floor, with surrounding columns and twoFavco 2700 Tower Cranes.
Accession number: 2004.02.0313 		undated
   

CD-ROM #: 19
Item Title Date
206 Different angle of 2004. 02. 0313.
Accession number: 2004.02.0314 		undated
   

CD-ROM #: 19
Item Title Date
207 A team of engineers/managers standing on steel stored on theperimeter of one of the upper floors.
Accession number: 2004.02.0315 		undated
   

CD-ROM #: 19
Item Title Date
208 Different angle of 2004. 02. 0315.
Accession number: 2004.02.0316 		undated
   

CD-ROM #: 19
Item Title Date
209 Core steel.
Accession number: 2004.02.0317 		undated
   

CD-ROM #: 19
Item Title Date
210 Helicopter view of site and lower Manhattan from the west.
Accession number: 2004.02.0321 		undated
   

CD-ROM #: 19
Item Title Date
211 Helicopter view of both towers from the southwest.
Accession number: 2004.02.0322 		undated
   

CD-ROM #: 20
Item Title Date
212 Similar to 2004. 02. 0322.
Accession number: 2004.02.0323 		undated
   

CD-ROM #: 20
Item Title Date
213 Helicopter view of both towers from the southwest.
Accession number: 2004.02.0324 		undated
   

CD-ROM #: 20
Item Title Date
214 Topping out. Last piece of steel is being lifted. 12. 23. 1970.
Accession number: 2004.02.0325 		1970
   

CD-ROM #: 20
Item Title Date
215 Different angle of 2004. 02. 0325. 12. 23. 1970.
Accession number: 2004.02.0326 		1970
   

CD-ROM #: 20
Item Title Date
216 Different angle of 2004. 02. 0325. 12. 23. 1970.
Accession number: 2004.02.0327 		1970
   

CD-ROM #: 20
Item Title Date
217 A group of engineers/managers on the job site.
Accession number: 2004.02.0328 		1970
   

CD-ROM #: 20
Item Title Date
218 Different angle of 2004. 02. 0325. 12. 23. 1970.
Accession number: 2004.02.0329 		1970
   

CD-ROM #: 20
Item Title Date
219 Different angle of 2004. 02. 0325. 12. 23. 1970.
Accession number: 2004.02.0331 		1970
   

CD-ROM #: 20
Item Title Date
220 Different angle of 2004. 02. 0328.
Accession number: 2004.02.0333 		undated
   

CD-ROM #: 20
Item Title Date
221 The South Tower. Façade cladding.
Accession number: 2004.02.0334 		undated
   

CD-ROM #: 21
Item Title Date
222 Christmas tree. 12. 23. 1970.
Accession number: 2004.02.0336 		1970
   

CD-ROM #: 21
Item Title Date
223 Christmas tree is held in a steel frame, lights already put in place. 12. 23. 1970.
Accession number: 2004.02.0339 		1970
   

CD-ROM #: 21
Item Title Date
224 Topping out steel has been lifted to the 3rd floor. 12. 23. 1970.
Accession number: 2004.02.0342 		1970
   

CD-ROM #: 21
Item Title Date
225 The steel holding the Christmas tree has been lifted to the 5thfloor. 12. 23. 1970.
Accession number: 2004.02.0343 		1970
   

CD-ROM #: 21
Item Title Date
226 Topping out steel and the steel holding the Christmas tree. 12. 23. 1970.
Accession number: 2004.02.0344 		1970
   

CD-ROM #: 21
Item Title Date
227 People looking up at the topping out steel and Christmas treebeing lifted. 12. 23. 1970.
Accession number: 2004.02.0345 		1970
   

CD-ROM #: 21
Item Title Date
228 People looking up at the topping out steel and Christmas treebeing lifted. 12. 23. 1970.
Accession number: 2004.02.0346 		1970
   

CD-ROM #: 21
Item Title Date
229 People looking up at the topping out steel and Christmas treebeing lifted. 12. 23. 1970.
Accession number: 2004.02.0351 		1970
   

CD-ROM #: 21
Item Title Date
230 Different angle of 2004. 02. 0351. 12. 23. 1970.
Accession number: 2004.02.0352 		1970
   

CD-ROM #: 21
Item Title Date
231 Continuing an action from 2004. 02. 0344. Christmas tree liftedfurther. 12. 23. 1970.
Accession number: 2004.02.0355 		1970
   

CD-ROM #: 21
Item Title Date
232 Christmas tree being lifted. Seen from the inside of one of thetop floors. 12. 23. 1970.
Accession number: 2004.02.0356 		1970
   

CD-ROM #: 22
Item Title Date
233 Christmas tree being lifted. Seen from the top of the building. 12. 23. 1970.
Accession number: 2004.02.0357 		1970
   

CD-ROM #: 22
Item Title Date
234 Favco 2700 Tower Crane at the roof level, surrounded by aframework of steel beams.
Accession number: 2004.02.0358 		undated
   

CD-ROM #: 22
Item Title Date
235 Steelwork at the mansard level of the North Tower.
Accession number: 2004.02.0359 		undated
   

CD-ROM #: 22
Item Title Date
236 Steelwork at the mansard level of the North Tower.
Accession number: 2004.02.0360 		undated
   

CD-ROM #: 22
Item Title Date
237 View to the south from the roof level of the North Tower.
Accession number: 2004.02.0361 		undated
   

CD-ROM #: 22
Item Title Date
238 View to the southwest from roof level of the North Tower,
Accession number: 2004.02.0362 		undated
   

CD-ROM #: 22
Item Title Date
239 Mansard steelwork.
Accession number: 2004.02.0363 		undated
   

CD-ROM #: 22
Item Title Date
240 Mansard steelwork.
Accession number: 2004.02.0364 		undated
   

CD-ROM #: 22
Item Title Date
241 The roof of the South Tower as seen from the North Tower.
Accession number: 2004.02.0365 		undated
   

CD-ROM #: 22
Item Title Date
242 Different angle of 2004. 02. 0365.
Accession number: 2004.02.0366 		undated
   

CD-ROM #: 22
Item Title Date
243 The roof of the South Tower as seen from the North Tower. In
Accession number: 2004.02.0367 		undated
   

CD-ROM #: 22
Item Title Date
244 View to the northeast, showing Brooklyn and Manhattan bridges.
Accession number: 2004.02.0368 		undated
   

CD-ROM #: 22
Item Title Date
245 View to the east, showing East River and Brooklyn.
Accession number: 2004.02.0369 		undated
   

CD-ROM #: 23
Item Title Date
246 View to the northeast, showing the Woolworth Building.
Accession number: 2004.02.0370 		undated
   

CD-ROM #: 23
Item Title Date
247 Worker measuring crack on external wall steel column.
Accession number: 2004.02.0373 		undated
   

CD-ROM #: 23
Item Title Date
248 Construction view looking east from within the job site.
Accession number: 2004.02.0381 		undated
   

CD-ROM #: 23
Item Title Date
249 Elevation of two towers.
Accession number: 2004.02.0382 		undated
   

CD-ROM #: 23
Item Title Date
250 View of the two towers from ground level.
Accession number: 2004.02.0383 		undated
   

CD-ROM #: 23
Item Title Date
251 Elevation of the two towers.
Accession number: 2004.02.0384 		undated
   

CD-ROM #: 23
Item Title Date
252 Construction view from within the job site.
Accession number: 2004.02.0385 		undated
   

CD-ROM #: 23
Item Title Date
253 Fabricated mast on the grade ready to be hoisted.
Accession number: 2004.02.0387 		undated
   

CD-ROM #: 23
Item Title Date
254 Fabricated mast on the grade ready to be hoisted.
Accession number: 2004.02.0389 		undated
   

CD-ROM #: 23
Item Title Date
255 Fabricated mast on the grade ready to be hoisted.
Accession number: 2004.02.0391 		undated
   

CD-ROM #: 23
Item Title Date
256 Fabricated mast on the grade ready to be hoisted.
Accession number: 2004.02.0394 		undated
   

CD-ROM #: 23
Item Title Date
257 Steel at mansard level supporting the antenna.
Accession number: 2004.02.0396 		undated
   

CD-ROM #: 23
Item Title Date
258 Steel at mansard level supporting the antenna.
Accession number: 2004.02.0397 		undated
   

CD-ROM #: 24
Item Title Date
259 Mansard steelwork.
Accession number: 2004.02.0398 		undated
   

CD-ROM #: 24
Item Title Date
260 Mansard steelwork. The floor is boarded out.
Accession number: 2004.02.0400 		undated
   

CD-ROM #: 24
Item Title Date
261 Core steelwork at mansard level.
Accession number: 2004.02.0401 		undated
   

CD-ROM #: 24
Item Title Date
262 Elevations of two towers.
Accession number: 2004.02.0403 		undated
   

CD-ROM #: 24
Item Title Date
263 Top of the South Tower.
Accession number: 2004.02.0404 		undated
   

CD-ROM #: 24
Item Title Date
264 Roof steelwork, with a north view in the background.
Accession number: 2004.02.0405 		undated
   

CD-ROM #: 24
Item Title Date
265 Roof steelwork.
Accession number: 2004.02.0406 		undated
   

CD-ROM #: 24
Item Title Date
266 The base of the mast.
Accession number: 2004.02.0407 		undated
   

CD-ROM #: 24
Item Title Date
267 The base of the mast.
Accession number: 2004.02.0408 		undated
   

CD-ROM #: 24
Item Title Date
268 Roof steelwork.
Accession number: 2004.02.0409 		undated
   

CD-ROM #: 24
Item Title Date
269 Roof steelwork.
Accession number: 2004.02.0410 		undated
   

CD-ROM #: 25
Item Title Date
270 The base of the mast, with one of the cranes.
Accession number: 2004.02.0411 		undated
   

CD-ROM #: 25
Item Title Date
271 Different angle of 2004. 02. 0411.
Accession number: 2004.02.0412 		undated
   

CD-ROM #: 25
Item Title Date
272 Different angle of 2004. 02. 0411.
Accession number: 2004.02.0413 		undated
   

CD-ROM #: 25
Item Title Date
273 Different angle of 2004. 02. 0411.
Accession number: 2004.02.0414 		undated
   

CD-ROM #: 25
Item Title Date
274 Roof perimeter of the North Tower.
Accession number: 2004.02.0415 		undated
   

CD-ROM #: 25
Item Title Date
275 Roof perimeter of the North Tower, showing the perimetersteelwork.
Accession number: 2004.02.0416 		undated
   

CD-ROM #: 25
Item Title Date
276 Roof perimeter of the North Tower, showing a view to thenorthwest.
Accession number: 2004.02.0417 		undated
   

CD-ROM #: 25
Item Title Date
277 Roof of the North Tower.
Accession number: 2004.02.0418 		undated
   

CD-ROM #: 25
Item Title Date
278 The base of the mast.
Accession number: 2004.02.0419 		undated
   

CD-ROM #: 25
Item Title Date
279 The base of the mast. A pair of men working at the top.
Accession number: 2004.02.0420 		undated
   

CD-ROM #: 25
Item Title Date
280 Roof steelwork on the North Tower. A man walking along aboarded area.
Accession number: 2004.02.0421 		undated
   

CD-ROM #: 26
Item Title Date
281 Roof steelwork on the North Tower. A man walking along abeam.
Accession number: 2004.02.0422 		undated
   

CD-ROM #: 26
Item Title Date
282 The base of the mast. A man working on a temporary platformheld up by rope is checking the riveting machine.
Accession number: 2004.02.0423 		undated
   

CD-ROM #: 26
Item Title Date
283 The base of the mast. A man working on a temporary platformheld up by rope is swinging a mallet.
Accession number: 2004.02.0424 		undated
   

CD-ROM #: 26
Item Title Date
284 Different angle of 2004. 02. 0424.
Accession number: 2004.02.0425 		undated
   

CD-ROM #: 26
Item Title Date
285 The base of the mast. A man working on a temporary platform ischecking rivets.
Accession number: 2004.02.0426 		undated
   

CD-ROM #: 26
Item Title Date
286 The base of the mast. A man working on a temporary platformheld up by rope is swinging a mallet.
Accession number: 2004.02.0427 		undated
   

CD-ROM #: 26
Item Title Date
287 Roof steelwork.
Accession number: 2004.02.0428 		undated
   

CD-ROM #: 26
Item Title Date
288 Roof steelwork and the base of the mast. A man is walking alonga beam.
Accession number: 2004.02.0429 		undated
   

CD-ROM #: 26
Item Title Date
289 The base of the mast with men working on it.
Accession number: 2004.02.0430 		undated
   

CD-ROM #: 26
Item Title Date
290 Roof steelwork.
Accession number: 2004.02.0431 		undated
   

CD-ROM #: 26
Item Title Date
291 The welding on a steel truss.
Accession number: 2004.02.0454 		undated
   

CD-ROM #: 27
Item Title Date
292 The welding on a steel truss.
Accession number: 2004.02.0455 		undated
   

CD-ROM #: 27
Item Title Date
293 The welding on a steel truss.
Accession number: 2004.02.0456 		undated
   

CD-ROM #: 27
Item Title Date
294 Group of men discussing a drawing.
Accession number: 2004.02.0459 		undated
   

CD-ROM #: 27
Item Title Date
295 Off-site testing to prove that cracking in steel columns was dueto water freezing inside them.
Accession number: 2004.02.0460 		undated
   

CD-ROM #: 27
Item Title Date
296 A man is looking into the testing machinery.
Accession number: 2004.02.0461 		undated
   

CD-ROM #: 27
Item Title Date
297 The steel from the side. The bulge is evident.
Accession number: 2004.02.0465 		undated
   

CD-ROM #: 27
Item Title Date
298 The bulge in the steel before the cutout is made.
Accession number: 2004.02.0466 		undated
   

CD-ROM #: 27
Item Title Date
299 The straight lines of steel before freezing.
Accession number: 2004.02.0468 		undated
   

CD-ROM #: 27
Item Title Date
300 The bulge in profile.
Accession number: 2004.02.0470 		undated
   

CD-ROM #: 27
Item Title Date
301 Off-site testing. Cutout.
Accession number: 2004.02.0481 		undated
   

CD-ROM #: 27
Item Title Date
302 Chalk annotations on the side of the plate before cutout.
Accession number: 2004.02.0482 		undated
   

CD-ROM #: 28
Item Title Date
303 Slump test being done on concrete. In the background is aconcrete truck.
Accession number: 2004.02.0485 		undated
   

CD-ROM #: 28
Item Title Date
304 Two men are standing in front of a completed concrete slumptest.
Accession number: 2004.02.0486 		undated
   

CD-ROM #: 28
Item Title Date
305 Concrete being poured from a truck and a group of men standingaround a cube test.
Accession number: 2004.02.0487 		undated
   

CD-ROM #: 28
Item Title Date
306 Exposed reinforcement bar on a concrete slab, which has beendamaged during off-site testing.
Accession number: 2004.02.0490 		undated
   

CD-ROM #: 28
Item Title Date
307 The two towers as seen from a helicopter.
Accession number: 2004.02.0495 		undated
   

CD-ROM #: 28
Item Title Date
308 Different angle of 2004. 02. 0495.
Accession number: 2004.02.0496 		undated
   

CD-ROM #: 28
Item Title Date
309 Different angle of 2004. 02. 0495.
Accession number: 2004.02.0497 		undated
   

CD-ROM #: 28
Item Title Date
310 The base of the big antenna with a smaller antenna behind it.
Accession number: 2004.02.0502 		undated
   

CD-ROM #: 28
Item Title Date
311 The top of the elevation of the South Tower as seen from theNorth Tower roof.
Accession number: 2004.02.0504 		undated
   

CD-ROM #: 28
Item Title Date
312 The base of the big antenna and a smaller antenna.
Accession number: 2004.02.0505 		undated
   

CD-ROM #: 28
Item Title Date
313 The base for a small antenna.
Accession number: 2004.02.0506 		undated
   

CD-ROM #: 29
Item Title Date
314 Interior of the mechanical roof at 108 or 109th floor is seen withthe fireproofing work.
Accession number: 2004.02.0507 		undated
   

CD-ROM #: 29
Item Title Date
315 Interior of the mechanical roof at 108 or 109th floor. Mechanicalductwork is stored on the perimeter. A pipe bending machine is visible.
Accession number: 2004.02.0508 		undated
   

CD-ROM #: 29
Item Title Date
316 Plaza with the Sphere.
Accession number: 2004.02.0513 		undated
   

CD-ROM #: 29
Item Title Date
317 Tree columns.
Accession number: 2004.02.0514 		undated
   

CD-ROM #: 29
Item Title Date
318 The top of a crane arm, used to lift materials from the street afterthe construction cranes were removed.
Accession number: 2004.02.0519 		undated
   

CD-ROM #: 29
Item Title Date
319 The base of a crane arm used to lift materials from the street after the construction cranes were removed.
Accession number: 2004.02.0520 		undated
   

CD-ROM #: 29
Item Title Date
320 The mast base.
Accession number: 2004.02.0521 		undated
   

CD-ROM #: 29
Item Title Date
321 View to the north from the North Tower.
Accession number: 2004.02.0524 		undated
   

CD-ROM #: 29
Item Title Date
322 Antenna system.
Accession number: 2004.02.0528 		undated
   

CD-ROM #: 29
Item Title Date
323 Antenna system on roof.
Accession number: 2004.02.0529 		undated
   

CD-ROM #: 29
Item Title Date
324 Antenna system on roof.
Accession number: 2004.02.0530 		undated
   

CD-ROM #: 30
Item Title Date
325 Antenna system.
Accession number: 2004.02.0531 		undated
   

CD-ROM #: 30
Item Title Date
326 Antenna system on roof.
Accession number: 2004.02.0533 		undated
   

CD-ROM #: 30
Item Title Date
327 Antenna system on roof.
Accession number: 2004.02.0534 		undated
   

CD-ROM #: 30
Item Title Date
328 Antenna system on roof.
Accession number: 2004.02.0537 		undated
   

CD-ROM #: 30
Item Title Date
329 Antenna system on roof.
Accession number: 2004.02.0540 		undated
   

CD-ROM #: 30
Item Title Date
330 Installing a column.
Accession number: 2004.02.0541 		undated
   

CD-ROM #: 30
Item Title Date
331 Tree column is being lifted into place. A man on a temporaryplatform (a board held up by a rope) aligns it with the column below.
Accession number: 2004.02.0543 		undated
   

CD-ROM #: 30
Item Title Date
332 Wall panels and a floor truss have been put into place. BarclayVesey Building is seen.
Accession number: 2004.02.0544 		undated
   

CD-ROM #: 30
Item Title Date
333 Follows on from 2004. 02. 0035.
Accession number: 2004.02.0545 		undated
   

CD-ROM #: 30
Item Title Date
334 Construction cranes hoisting steel.
Accession number: 2004.02.0552 		undated
   

CD-ROM #: 31
Item Title Date
335 Hoisting steel.
Accession number: 2004.02.0553 		undated
   

CD-ROM #: 31
Item Title Date
336 Cladding.
Accession number: 2004.02.0554 		undated
   

CD-ROM #: 31
Item Title Date
337 Refrigerator plant - operating level, low zone refrigerationmachine.
Accession number: 2004.02.0558 		undated
   

CD-ROM #: 31
Item Title Date
338 Refrigerator plant - operating level, high and low zonerefrigeration machine.
Accession number: 2004.02.0559 		undated
   

CD-ROM #: 31
Item Title Date
339 Dampers.
Accession number: 2004.02.0560 		undated
   

CD-ROM #: 31
Item Title Date
340 Dampers.
Accession number: 2004.02.0561 		undated
   

CD-ROM #: 31
Item Title Date
341 Dampers.
Accession number: 2004.02.0562 		undated
   

CD-ROM #: 31
Item Title Date
342 Sunset, semi-transparent towers.
Accession number: 2004.02.0564 		undated
   

CD-ROM #: 31
Item Title Date
343 Completed towers.
Accession number: 2004.02.0579 		undated
   

CD-ROM #: 31
Item Title Date
344 Construction cranes hoisting steel.
Accession number: 2004.02.0552 		undated
   

CD-ROM #: 31
Item Title Date
345 Cladding.
Accession number: 2004.02.0554 		undated
   

CD-ROM #: 31
Item Title Date
346 Refrigerator plant - operating level, low zone refrigerationmachine.
Accession number: 2004.02.0558 		undated
   

CD-ROM #: 31
Item Title Date
347 Refrigerator plant - operating level, high and low zonerefrigeration machine.
Accession number: 2004.02.0559 		undated
   

CD-ROM #: 31
Item Title Date
348 Dampers.
Accession number: 2004.02.0560 		undated
   

CD-ROM #: 31
Item Title Date
349 Dampers.
Accession number: 2004.02.0561 		undated
   

CD-ROM #: 31
Item Title Date
350 Dampers.
Accession number: 2004.02.0562 		undated
   

CD-ROM #: 31
Item Title Date
351 Sunset, semitransparent towers.
Accession number: 2004.02.0564 		undated
   

CD-ROM #: 31
Item Title Date
352 Completed Towers view.
Accession number: 2004.02.0579 		undated
   

CD-ROM #: 31
Item Title Date
353 View looking down on plaza showing the Sphere covered.
Accession number: 2004.02.1362 		undated
   

CD-ROM #: 32
Item Title Date
354 View looking down on plaza.
Accession number: 2004.02.1365 		undated
   

CD-ROM #: 32
Item Title Date
355 Sunlight cast diagonally across view of plaza.
Accession number: 2004.02.1368 		undated
   

CD-ROM #: 32
Item Title Date
356 Sunlight cast diagonally across view of plaza.
Accession number: 2004.02.1371 		undated
   

CD-ROM #: 32
Item Title Date
357 Sunlight cast diagonally across view of plaza.
Accession number: 2004.02.1373 		undated
   

CD-ROM #: 32
Item Title Date
358 Sunlight cast diagonally across view of plaza.
Accession number: 2004.02.1378 		undated
   

CD-ROM #: 32
Item Title Date
359 View at plaza level showing gravel and concrete construction.
Accession number: 2004.02.1383 		undated
   

CD-ROM #: 32
Item Title Date
360 View at plaza level showing wood supports for plaza covering.
Accession number: 2004.02.1387 		undated
   

CD-ROM #: 33
Item Title Date
361 View at plaza level showing wood supports in foreground andplaza covering in background.
Accession number: 2004.02.1390 		undated
   

CD-ROM #: 33
Item Title Date
362 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1391 		undated
   

CD-ROM #: 33
Item Title Date
363 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1392 		undated
   

CD-ROM #: 33
Item Title Date
364 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1393 		undated
   

CD-ROM #: 33
Item Title Date
365 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1400 		undated
   

CD-ROM #: 33
Item Title Date
366 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1401 		undated
   

CD-ROM #: 33
Item Title Date
367 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1403 		undated
   

CD-ROM #: 33
Item Title Date
368 Different angle of 2004. 02. 0390.
Accession number: 2004.02.1405 		undated
   

CD-ROM #: 33
Item Title Date
369 View of plaza at ground level.
Accession number: 2004.02.1416 		undated
   

CD-ROM #: 33
Item Title Date
370 Plaza level with metal beams in foreground and sand piles inbackground.
Accession number: 2004.02.1419 		undated
   

CD-ROM #: 34
Item Title Date
371 Plaza level with sand piles in close-up.
Accession number: 2004.02.1420 		undated
   

CD-ROM #: 34
Item Title Date
372 Plaza level with cart.
Accession number: 2004.02.1422 		undated
   

CD-ROM #: 34
Item Title Date
373 Plaza level with blocks in background.
Accession number: 2004.02.1425 		undated
   

CD-ROM #: 34
Item Title Date
374 Plaza level with pyramid shaped wooden frame along sidebuilding.
Accession number: 2004.02.1428 		undated
   

CD-ROM #: 34
Item Title Date
375 Plaza level with pyramid shaped wooden frame along sidebuilding.
Accession number: 2004.02.1429 		undated
   

CD-ROM #: 34
Item Title Date
376 Plaza level with pyramid shaped wooden frame along sidebuilding, close-up.
Accession number: 2004.02.1430 		undated
   

CD-ROM #: 34
Item Title Date
377 Plaza level with gravel spread over asphalt rubber in preparationfor laying tiles.
Accession number: 2004.02.1434 		undated
   

CD-ROM #: 34
Item Title Date
378 Plaza with covered sculpture and gravel tiles.
Accession number: 2004.02.1446 		undated
   

CD-ROM #: 34
Item Title Date
379 Plaza with gravel and tiles.
Accession number: 2004.02.1450 		undated
   

CD-ROM #: 34
Item Title Date
380 Plaza with gravel spread out, tree columns are in background.
Accession number: 2004.02.1547 		undated
   

CD-ROM #: 35
Item Title Date
381 Plaza with gravel spread out, tree columns are in background,wooden supports in foreground.
Accession number: 2004.02.1549 		undated
   

CD-ROM #: 35
Item Title Date
382 Plaza with gravel spread out, tree columns are in background,wooden supports in foreground.
Accession number: 2004.02.1550 		undated
   

CD-ROM #: 35
Item Title Date
383 Plaza with view of covered sculpture, 7 WTC is in background.
Accession number: 2004.02.1551 		undated
   

CD-ROM #: 35
Item Title Date
384 Stacked tiles on plaza with tree columns in background.
Accession number: 2004.02.1558 		undated
   

CD-ROM #: 35
Item Title Date
385 Man on scaffolding working on wall.
Accession number: 2004.02.1568 		undated
   

CD-ROM #: 35
Item Title Date
386 Wooden supports holding base of wall.
Accession number: 2004.02.1569 		undated
   

CD-ROM #: 35
Item Title Date
387 The Sphere.
Accession number: 2004.02.1590 		undated
   

CD-ROM #: 35
Item Title Date
388 Plaza viewed from above through window.
Accession number: 2004.02.1591 		undated
   

CD-ROM #: 35
Item Title Date
389 Outside tower wall.
Accession number: 2004.02.1592 		undated
   

CD-ROM #: 35
Item Title Date
390 View of windows and bare ceiling.
Accession number: 2004.02.1619 		undated
   

CD-ROM #: 36
Item Title Date
391 Group of men wearing hard hats looking north throughunfinished facade.
Accession number: 2004.02.1631 		undated
   

CD-ROM #: 36
Item Title Date
392 Group of men wearing hard hats looking through unfinishedfacade.
Accession number: 2004.02.1632 		undated
   

CD-ROM #: 36
Item Title Date
393 Three men standing around wooden and steel beams.
Accession number: 2004.02.1655 		undated
   

CD-ROM #: 36
Item Title Date
394 Steel construction of beams.
Accession number: 2004.02.1700 		undated
   

CD-ROM #: 36
Item Title Date
395 Steel construction of beams.
Accession number: 2004.02.1701 		undated
   

CD-ROM #: 36
Item Title Date
396 Cylindrical steel support on angle.
Accession number: 2004.02.1704 		undated
   

CD-ROM #: 36
Item Title Date
397 Steel structure of tall columns and intersecting poles.
Accession number: 2004.02.1714 		undated
   

CD-ROM #: 36
Item Title Date
398 Model of WTC.
Accession number: 2004.02.2288 		undated
   

CD-ROM #: 37
Item Title Date
399 Model of WTC from high angle.
Accession number: 2004.02.2290 		undated
   

CD-ROM #: 37
Item Title Date
400 Long shot of WTC model.
Accession number: 2004.02.2292 		undated
   

CD-ROM #: 37
Item Title Date
401 Bird's eye view of tower model with wind tunnel wiring.
Accession number: 2004.02.2293 		undated
   

CD-ROM #: 37
Item Title Date
402 Man lifting one tower model.
Accession number: 2004.02.2295 		undated
   

CD-ROM #: 37
Item Title Date
403 Two men examining tower model.
Accession number: 2004.02.2296 		undated
   

CD-ROM #: 37
Item Title Date
404 Electronic Recording machines.
Accession number: 2004.02.2298 		undated
   

CD-ROM #: 37
Item Title Date
405 Electronic Recording machines.
Accession number: 2004.02.2299 		undated
   

CD-ROM #: 37
Item Title Date
406 Testing steel.
Accession number: 2004.02.2300 		undated
   

CD-ROM #: 37
Item Title Date
407 Model of lower Manhattan from high angle.
Accession number: 2004.02.2302 		undated
   

CD-ROM #: 37
Item Title Date
408 Model of lower Manhattan from high angle.
Accession number: 2004.02.2304 		undated
   

CD-ROM #: 37
Item Title Date
409 Model of lower Manhattan from high angle.
Accession number: 2004.02.2305 		undated
   

CD-ROM #: 38
Item Title Date
410 Level view of lower Manhattan model.
Accession number: 2004.02.2308 		undated
   

CD-ROM #: 38
Item Title Date
411 Model of lower Manhattan from high angle.
Accession number: 2004.02.2312 		undated
   

CD-ROM #: 38
Item Title Date
412 Transparent WTC model.
Accession number: 2004.02.2313 		undated
   

CD-ROM #: 38
Item Title Date
413 Model of lower Manhattan in blue spotlight.
Accession number: 2004.02.2320 		undated
   

CD-ROM #: 38
Item Title Date
414 Level view of lower Manhattan model.
Accession number: 2004.02.2321 		undated
   

CD-ROM #: 38
Item Title Date
415 Level view of lower Manhattan model with WTC on right.
Accession number: 2004.02.2322 		undated
   

CD-ROM #: 38
Item Title Date
416 Model of two towers atop orange base.
Accession number: 2004.02.2327 		undated
   

CD-ROM #: 38
Item Title Date
417 Model of two towers atop orange base.
Accession number: 2004.02.2329 		undated
   

CD-ROM #: 38
Item Title Date
418 Detail of air mechanism in model of tower.
Accession number: 2004.02.2331 		undated
   

CD-ROM #: 38
Item Title Date
419 Detail of air mechanism in model of tower.
Accession number: 2004.02.2332 		undated
   

CD-ROM #: 38
Item Title Date
420 Detail of air mechanism in model of tower.
Accession number: 2004.02.2333 		undated
   

CD-ROM #: 39
Item Title Date
421 Wiring of air mechanism.
Accession number: 2004.02.2335 		undated
   

CD-ROM #: 39
Item Title Date
422 Air mechanism detail.
Accession number: 2004.02.2336 		undated
   

CD-ROM #: 39
Item Title Date
423 Air mechanism detail.
Accession number: 2004.02.2337 		undated
   

CD-ROM #: 39
Item Title Date
424 Model of floor truss system.
Accession number: 2004.02.2345 		undated
   

CD-ROM #: 39
Item Title Date
425 Steel tree fabrication.
Accession number: 2004.02.2378 		undated
   

CD-ROM #: 39
Item Title Date
426 Steel wall fabrication.
Accession number: 2004.02.2383 		undated
   

CD-ROM #: 39
Item Title Date
427 Minimum deflection/Height ratio/Return period graph.
Accession number: 2004.02.2427 		undated
   

CD-ROM #: 39
Item Title Date
428 Peak acceleration/Return period graph.
Accession number: 2004.02.2429 		undated
   

CD-ROM #: 40
Item Title Date
429 Sketch of 2 three-dimensional rectilinear boxes.
Accession number: 2004.02.2431 		undated
   

CD-ROM #: 40
Item Title Date
430 Occupant sensitivity/return period.
Accession number: 2004.02.2432 		undated
   

CD-ROM #: 40
Item Title Date
431 Unrecognizable.
Accession number: 2004.02.2433 		undated
   

CD-ROM #: 40
Item Title Date
432 Air leak system, Fig. 13.
Accession number: 2004.02.2438 		undated
   

CD-ROM #: 40
Item Title Date
433 ViscoElastic Damping System, Fig. 12.
Accession number: 2004.02.2442 		undated
   

CD-ROM #: 40
Item Title Date
434 Detail of damper color drawing.
Accession number: 2004.02.2443 		undated
   

CD-ROM #: 40
Item Title Date
435 Floor truss and damper schematic drawing.
Accession number: 2004.02.2446 		undated
   

CD-ROM #: 40
Item Title Date
436 ViscoElastic layer. Fig. 12.
Accession number: 2004.02.2447 		undated
   

CD-ROM #: 40
Item Title Date
437 Installed location of damping unit, Fig. 2.
Accession number: 2004.02.2448 		undated
   

CD-ROM #: 41
Item Title Date
438 Schematic building cross section diagram.
Accession number: 2004.02.2449 		undated
   

CD-ROM #: 41
Item Title Date
439 Schematic building cross Section diagram.
Accession number: 2004.02.2453 		undated
   

CD-ROM #: 41
Item Title Date
440 Schematic drawing of truss and dampers.
Accession number: 2004.02.2455 		undated
   

CD-ROM #: 41
Item Title Date
441 Drawing of four hollow squares.
Accession number: 2004.02.2458 		undated
   

CD-ROM #: 41
Item Title Date
442 Fig. 8. Comparison of data on thresholds of perception ofvibration.
Accession number: 2004.02.2462 		undated
   

CD-ROM #: 41
Item Title Date
443 Fig. 6. Cumulative frequency distributions of perceptionthresholds in HATS-I.
Accession number: 2004.02.2463 		undated
   

CD-ROM #: 41
Item Title Date
444 Fig. 2. Geometric means of perception thresholds inexperiment HATS-I.
Accession number: 2004.02.2464 		undated
   

CD-ROM #: 41
Item Title Date
445 Steel box with door in brick room viewed from above. Takenfrom lost photograph.
Accession number: 2004.02.2465 		undated
   

CD-ROM #: 41
Item Title Date
446 Wheel between wall and steel beam. Taken from lostphotograph.
Accession number: 2004.02.2466 		undated
   

CD-ROM #: 41
Item Title Date
447 Recording machine with wave monitor. Taken from lostphotograph.
Accession number: 2004.02.2467 		undated
   

CD-ROM #: 42
Item Title Date
448 Man looking through viewing machine. Taken from lostphotograph.
Accession number: 2004.02.2468 		undated
   

CD-ROM #: 42
Item Title Date
449 Steel beams, 'E' inscribed on one in lower left. Taken from lostphotograph.
Accession number: 2004.02.2469 		undated
   

CD-ROM #: 42
Item Title Date
450 Machine in soundproof chamber. Taken from lost photograph.
Accession number: 2004.02.2470 		undated
   

CD-ROM #: 42
Item Title Date
451 Oregon Research Institute Planar Motion Chamber and recordingdevices. Taken from lost photograph.
Accession number: 2004.02.2471 		undated
   

CD-ROM #: 42
Item Title Date
452 Man examining machine. Taken from lost photograph.
Accession number: 2004.02.2472 		undated
   

CD-ROM #: 42
Item Title Date
453 Four men in research laboratory. Taken from lost photograph.
Accession number: 2004.02.2473 		undated
   

CD-ROM #: 42
Item Title Date
454 Wiring in laboratory. Taken from lost photograph.
Accession number: 2004.02.2474 		undated
   

CD-ROM #: 42
Item Title Date
455 Fig. 2. Typical wind pressures on cladding.
Accession number: 2004.02.2475 		undated
   

CD-ROM #: 42
Item Title Date
456 Fig. 3. Pressure difference across curtain wall still air.
Accession number: 2004.02.2479 		undated
   

CD-ROM #: 42
Item Title Date
457 Fig. 4. Diagram of stack effect-temperature alone.
Accession number: 2004.02.2483 		undated
   

CD-ROM #: 43
Item Title Date
458 Diagram of stack effect-temperature alone.
Accession number: 2004.02.2486 		undated
   

CD-ROM #: 43
Item Title Date
459 Stack effect, temperature alone-diagram of airflow,simplified building.
Accession number: 2004.02.2487 		undated
   

CD-ROM #: 43
Item Title Date
460 Stack effect, temp alone-diagram of pressure differenceacross façade.
Accession number: 2004.02.2488 		undated
   

CD-ROM #: 43
Item Title Date
461 Fig. 5. Diagram of mean wind pressure.
Accession number: 2004.02.2489 		undated
   

CD-ROM #: 43
Item Title Date
462 Fig. 6. Diagram of mean external pressure.
Accession number: 2004.02.2493 		undated
   

CD-ROM #: 43
Item Title Date
463 Fig. 8. Stack effect, wind alone-diagram of airflow, simplifiedbuilding.
Accession number: 2004.02.2495 		undated
   

CD-ROM #: 43
Item Title Date
464 Fig. 11. Definition sketches for separated flows.
Accession number: 2004.02.2496 		undated
   

CD-ROM #: 43
Item Title Date
465 Fig. 13. Airflow and rain drop trajectories.
Accession number: 2004.02.2499 		undated
   

CD-ROM #: 43
Item Title Date
466 Fig. 14. Airflow around a tall building.
Accession number: 2004.02.2502 		undated
   

CD-ROM #: 44
Item Title Date
467 Two graphs. Twenty minute average gradient wind speed(MPH) greater than stated value.
Accession number: 2004.02.2504 		undated
   

CD-ROM #: 44
Item Title Date
468 One page diagram. Primary frame, primary floor, secondaryfloor, sliding supports and dampers illustrated.
Accession number: 2004.02.2506 		undated
   

CD-ROM #: 44
Item Title Date
469 Figure 1. Time changes of wind speed and rate of rainfall in thesever typhoon (at Miyakojima Sept. 5, 1996. ).
Accession number: 2004.02.2509 		undated
   

CD-ROM #: 44
Item Title Date
470 Figure 1. Time changes of wind speed and rate of rainfall in thesever typhoon (at Miyakojima Sept. 5, 1996. ).
Accession number: 2004.02.2512 		undated
   

CD-ROM #: 44
Item Title Date
471 Figure 2. Increase of air density from raindrops in the air as thefunction of the rate of rainfall.
Accession number: 2004.02.2526 		undated
   

CD-ROM #: 44
Item Title Date
472 Figure 3. Time constant of raindrop motion in winds. Timeconstant plotted against drop radius.
Accession number: 2004.02.2534 		undated
   

CD-ROM #: 44
Item Title Date
473 Figure 4. Stability of water drops in the air (after Komabayashi,et al. )" average life time of drop plotted against drop radius.
Accession number: 2004.02.2549 		undated
   

CD-ROM #: 44
Item Title Date
474 Figure 7. An example of time changes of observed wind speed,vertical and horizontal.
Accession number: 2004.02.2561 		undated
   

CD-ROM #: 44
Item Title Date
475 Figure 7. An example of time changes of observed wind speed,vertical and horizontal rainfalls and their related quantities.
Accession number: 2004.02.2572 		undated
   

CD-ROM #: 44
Item Title Date
476 Figure 8. Variation of the ration of vertical and horizontalrainfall with wind speed, when wind is perpendicular to the wall (SSE, S and SSW).
Accession number: 2004.02.2573 		undated
   

CD-ROM #: 45
Item Title Date
477 Figure 8. Variation of the ratio of vertical and horizontal rainfalland wind speed when the wind is perpendicular to the wall.
Accession number: 2004.02.2581 		undated
   

CD-ROM #: 45
Item Title Date
478 Pressure differences due to stack effects.
Accession number: 2004.02.2590 		undated
   

CD-ROM #: 45
Item Title Date
479 Fig. 1. 1. The rainfall source diagram for Manchester.
Accession number: 2004.02.2601 		undated
   

CD-ROM #: 45
Item Title Date
480 Graph of wind effects on entrances during spring using Beaufort numbers.
Accession number: 2004.02.2612 		undated
   

CD-ROM #: 45
Item Title Date
481 Graph of wind effects on entrances during winter using Beaufort numbers.
Accession number: 2004.02.2624 		undated
   

CD-ROM #: 45
Item Title Date
482 Graph of tentative comfort criteria for windiness.
Accession number: 2004.02.2632 		undated
   

CD-ROM #: 45
Item Title Date
483 Diagram of wind gradients in different height environments.
Accession number: 2004.02.2637 		undated
   

CD-ROM #: 45
Item Title Date
484 World Trade Center (South Tower), exterior wall panel schedule, 1966.
Accession number: 2004.02.2639 		1966
   

CD-ROM #: 45
Item Title Date
485 World Trade Center (South Tower), exterior wall-type 100 columns diagram, 1966.
Accession number: 2004.02.2644 		1966
   

CD-ROM #: 45
Item Title Date
486 The World Trade Center structural drawing index-Tower A.
Accession number: 2004.02.2646 		undated
   

CD-ROM #: 46
Item Title Date
487 U. S. S. Office Building, diagonal bracing schedules-3rd to 63rd Floors.
Accession number: 2004.02.2647 		undated
   

CD-ROM #: 46
Item Title Date
488 Floor plan.
Accession number: 2004.02.2649 		undated
   

CD-ROM #: 46
Item Title Date
489 World diagram looking down from north pole.
Accession number: 2004.02.2651 		undated
   

CD-ROM #: 46
Item Title Date
490 Diagram of differing steel strengths.
Accession number: 2004.02.2652 		undated
   

CD-ROM #: 46
Item Title Date
491 Comparative diagram of wind pressures-New York buildingcode, proposed revised standard, World Trade Center.
Accession number: 2004.02.2653 		undated
   

CD-ROM #: 46
Item Title Date
492 Comparative diagram of wind pressures-New York building code, proposed revised standard, World Trade Center.
Accession number: 2004.02.2654 		undated
   

CD-ROM #: 46
Item Title Date
493 Graph of magnification factor vs. building depth.
Accession number: 2004.02.2655 		undated
   

CD-ROM #: 46
Item Title Date
494 Diagram of tall buildings, arranged according to year constructed.
Accession number: 2004.02.2656 		undated
   

CD-ROM #: 46
Item Title Date
495 Unrecognizable.
Accession number: 2004.02.2658 		undated
   

CD-ROM #: 46
Item Title Date
496 Elevation diagram of The Wolman Project and the World Trade Center.
Accession number: 2004.02.2660 		undated
   

CD-ROM #: 47
Item Title Date
497 Elevation diagram of The Wolman Project, West and North Façade.
Accession number: 2004.02.2661 		undated
   

CD-ROM #: 47
Item Title Date
498 Diagram of structural beam layout.
Accession number: 2004.02.2663 		undated
   

CD-ROM #: 47
Item Title Date
499 Diagram of wall stress in response to wind.
Accession number: 2004.02.2664 		undated
   

CD-ROM #: 47
Item Title Date
500 Figure 12. Six plan shapes of Aeroelastic models.
Accession number: 2004.02.2665 		undated
   

CD-ROM #: 47
Item Title Date
501 Diagram of concourse in relation to steel type.
Accession number: 2004.02.2666 		undated
   

CD-ROM #: 47
Item Title Date
502 Graph of New York skyscrapers, number of stories vs. lbs. per square foot with diagonal economy arrow indicator.
Accession number: 2004.02.2667 		undated
   

CD-ROM #: 47
Item Title Date
503 Floor plan-tower building.
Accession number: 2004.02.2668 		undated
   

CD-ROM #: 47
Item Title Date
504 Comparative diagram of wind pressures-New York building code, proposed revised standard, World Trade Center.
Accession number: 2004.02.2669 		undated
   

CD-ROM #: 47
Item Title Date
505 Diagram of approaching wind and drag force on structure.
Accession number: 2004.02.2670 		undated
   

CD-ROM #: 47
Item Title Date
506 Diagram of shear flow, chord forces, and out of plumbness forces.
Accession number: 2004.02.2671 		undated
   

CD-ROM #: 48
Item Title Date
507 Diagram of tensile tie and diaphragm shear below edge of concrete.
Accession number: 2004.02.2672 		undated
   

CD-ROM #: 48
Item Title Date
508 Diagram of building forces with and w/o shear lag with application of lateral force.
Accession number: 2004.02.2673 		undated
   

CD-ROM #: 48
Item Title Date
509 Diagram of belt trusses, framed tube, and shear lag with application of lateral force.
Accession number: 2004.02.2674 		undated
   

CD-ROM #: 48
Item Title Date
510 Diagram of beams with low shear stiffness and high shear stiffness.
Accession number: 2004.02.2675 		undated
   

CD-ROM #: 48
Item Title Date
511 Detailed diagram of column in tension and compression with application of lateral force.
Accession number: 2004.02.2676 		undated
   

CD-ROM #: 48
Item Title Date
512 Figure 1. Addition of steady-state and dynamic components of structure motion.
Accession number: 2004.02.2677 		undated
   

CD-ROM #: 48
Item Title Date
513 Cryptic wave graph including direction, time and force.
Accession number: 2004.02.2679 		undated
   

CD-ROM #: 48
Item Title Date
514 Wave graph of the World Trade Center including direction, time and force.
Accession number: 2004.02.2680 		undated
   

CD-ROM #: 48
Item Title Date
515 Drawing of wind force on building.
Accession number: 2004.02.2683 		undated
   

CD-ROM #: 48
Item Title Date
516 Detailed drawing of wind force on building including formulas.
Accession number: 2004.02.2684 		undated
   

CD-ROM #: 49
Item Title Date
517 Formula of time, mass, and force.
Accession number: 2004.02.2686 		undated
   

CD-ROM #: 49
Item Title Date
518 Formulas including variables M, F, H, W, and T.
Accession number: 2004.02.2687 		undated
   

CD-ROM #: 49
Item Title Date
519 Formula of MF in terms of H and T.
Accession number: 2004.02.2688 		undated
   

CD-ROM #: 49
Item Title Date
520 Diagram and formula of MF in terms of variables W, R, W, and H.
Accession number: 2004.02.2689 		undated
   

CD-ROM #: 49
Item Title Date
521 Formula for MF with H equal to 12. 2N and T(0) zvN.
Accession number: 2004.02.2690 		undated
   

CD-ROM #: 49
Item Title Date
522 Equation for T(0) in terms of H, W, g and k.
Accession number: 2004.02.2693 		undated
   

CD-ROM #: 49
Item Title Date
523 Formula for OSQ proportion.
Accession number: 2004.02.2694 		undated
   

CD-ROM #: 49
Item Title Date
524 Graph of oscillation of elevator cables.
Accession number: 2004.02.2695 		undated
   

CD-ROM #: 49
Item Title Date
525 Diagram of composite beam.
Accession number: 2004.02.2704 		undated
   

CD-ROM #: 49
Item Title Date
526 Diagram of two scales; one scale comparing WTC and Sears Tower, the other scale a detailed structural drawing of one tower.
Accession number: 2004.02.2787 		undated
   

CD-ROM #: 50
Item Title Date
527 U. S. S. Office Building, core interior column schedule.
Accession number: 2004.02.2792 		undated
   

CD-ROM #: 50
Item Title Date
528 Group of men. Three men with yellow hard hats and one with red hat standing in the distance.
Accession number: 2004.02.2795 		undated
   

CD-ROM #: 50
Item Title Date
529 Group of men. Four men standing in the background turned away from the camera and towards the steel trees of the tower's façade.
Accession number: 2004.02.2796 		undated
   

CD-ROM #: 50
Item Title Date
530 Wall and floor panels. View looking down on construction members and partially completed exterior wall.
Accession number: 2004.02.2797 		undated
   

CD-ROM #: 50
Item Title Date
531 Wall and floor panel connection. View east at high elevation through the partially assembled wall.
Accession number: 2004.02.2798 		undated
   

CD-ROM #: 50
Item Title Date
532 View of floor panel being lifted or placed overhead.
Accession number: 2004.02.2799 		undated
   

CD-ROM #: 50
Item Title Date
533 North tower.
Accession number: 2004.02.2800 		undated
   

CD-ROM #: 50
Item Title Date
534 Topping out. The final beam with the American flag being lifted up the tower. 12. 23. 1970.
Accession number: 2004.02.2801 		undated
   

CD-ROM #: 50
Item Title Date
535 Favco 2700 Tower Cranes.
Accession number: 2004.02.2802 		undated
   

CD-ROM #: 50
Item Title Date
536 View of lobby under construction.
Accession number: 2004.02.2803 		undated
   

CD-ROM #: 51
Item Title Date
537 Base of the mast.
Accession number: 2004.02.2804 		undated
   

CD-ROM #: 51
Item Title Date
538 Base of the mast.
Accession number: 2004.02.2805 		undated
   

CD-ROM #: 51
Item Title Date
539 Floor panels.
Accession number: 2004.02.2806 		undated
   

CD-ROM #: 51
Item Title Date
540 Yamasaki model of the World Trade Center in larger context model.
Accession number: 2004.02.2807 		undated
   

CD-ROM #: 51
Item Title Date
541 Man taking measurement of glass strength.
Accession number: 2004.02.2808 		undated
   

CD-ROM #: 51
Item Title Date
542 Favco 2700 Tower Cranes.
Accession number: 2004.02.2809 		undated
   

CD-ROM #: 51
Item Title Date
543 View of Sphere sculpture located in the WTC plaza.
Accession number: 2004.02.2810 		undated
   

CD-ROM #: 51
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