Page 1 of 2

Print 4 Times

2Tower

www.PaperModelsInc.com Patent PendingPaper Models, Inc.

WORLD TRADE TOWERS

World Trade CenterNew York, New York, U.S.A.

Statistics:• Built: 1970 – April, 1977• Location: New York, New York, USA• Completion Date: 1972 (Tower One), 1973 (TowerTwo); destroyed September 11, 2001• Budget: $500 million• Cost: $400 million• Height: 1,368 feet (Tower One), 1,362 feet (TowerTwo)• Stories: 110 each• Structural Materials: Steel• Facing Materials: Aluminum, steel• Architect(s): Minoru Yamaski & Associates, Architect,with Emery Roth and Sons• Engineer(s): Skilling, Helle, Christiansen & Robertson• Tower One was 1,368 feet (414 meters) tall;• Tower Two was 1,362 feet (412 meters) tall;• The Tower facades were constructed of aluminum andsteel lattice;• The Tower floors were prefabricated trussed steel, 33inches deep;• The Towers used tube construction with closely spacedcolumns and beams on the outer walls;• There were no interior columns in the Tower officespaces;• The Towers rested on solid bedrock. The foundationsextended more than 70 feet below ground;• Each tower contained 104 passenger elevators;• Both towers had 43,600 windows;• Approximately 50,000 people worked in the WorldTrade Center complex;• The two towers contained nine million square feet ofoffice space (nearly one acre per floor);• Owned and operated by the Port Authority of New Yorkand New Jersey.• The site contained 16 acres with buildings groupedaround a five acre central plaza;• The site is bounded by Vesey Street on the north,Church Street on the east, Liberty Street on the south, andWest Street on the west, about three blocks north of theNew York Stock Exchange.• The Observation deck, South Tower, WTC 2, floor 107(summer hours were 9:30am to 11:30pm).• Skylobbies on floors 44 and 78 were served by highspeed elevators.• The site contained seven underground levels includingservices, shopping, and a subway station.The two nine story Plaza Buildings, with roughly ell-shaped plans, flanked the main entrance to the complexfrom Church Street, with WTC 4 on the south and WTC 5

Print 4 Times

1Tower

www.PaperModelsInc.com Patent PendingPaper Models, Inc.

WORLD TRADETOWERS Tower

1

Tower2

Page 2 of 2

The

Wor

ldT

rade

Cen

ter

was

loca

ted

inlo

wer

Man

hatta

nan

dco

nsis

ted

oftw

o,11

0st

orie

sto

wer

s(k

now

nas

the

“Tw

inT

ower

s”)

and

five

smal

ler

build

ings

.T

hese

tow

ers

wer

eth

eta

llest

build

ings

inN

ewY

ork

City

and

the

3rd

talle

stsk

y-sc

rape

rsin

the

wor

ld.

Gro

undb

reak

ing

for

cons

truc

tion

was

onA

ugus

t5t

h,19

66.S

teel

cons

truc

tion

bega

nin

Aug

ust

1968

.Fir

stte

nant

occu

-pa

ncy

ofO

neW

TC

was

Dec

embe

r,19

70,a

ndoc

cupa

ncy

ofT

wo

WT

Cbe

gan

inJa

nuar

y19

72.R

ibbo

ncu

tting

was

onA

pril

4,19

73.

Bot

hth

eG

alle

ryon

the

107t

hfl

oor

and

the

Obs

erva

tion

Dec

kon

the

110t

hfl

oor

(the

wor

ld‘s

high

est

open

-air

view

ing

plat

form

)pr

ovid

edbr

eath

taki

ngvi

ews

ofal

lof

New

Yor

kC

ity.

The

sebu

ildin

gsw

ere

com

plet

edin

Apr

il19

73.

The

build

ings

wer

elig

ht,e

cono

mic

alst

ruct

ures

desi

gned

toke

epth

ew

ind

brac

ing

onth

eou

tsid

esu

rfac

es.

Con

stru

cted

byth

ePo

rtA

utho

rity

ofN

ewY

ork

and

New

Jers

eyin

the

earl

y19

70s,

the

Wor

ldT

rade

Cen

ter

tow

ers

wer

e,fo

rth

eir

time,

the

best

know

nex

ampl

esof

tube

build

ings

.Tub

ebu

ildin

gsar

est

reng

then

edby

clos

ely

spac

edco

l-um

nsan

dbe

ams

inth

eou

ter

wal

ls.

The

clos

ely

spac

edco

lum

nsan

dbe

ams

inea

chto

wer

form

eda

stee

ltu

beth

at,

toge

ther

with

anin

tern

alco

re,w

ithst

ood

the

trem

endo

usw

ind

load

sth

ataf

fect

build

ings

this

tall.

Asi

defr

omw

ithst

andi

ngen

orm

ous

win

dlo

ads,

the

Wor

ldT

rade

Cen

ter

tow

ers

wer

eal

soco

nstr

ucte

dto

with

stan

dse

t-tle

men

tlo

ads.

Bec

ause

the

tow

ers

wer

ebu

ilton

six

acre

sof

land

fill,

the

foun

datio

nof

each

tow

erha

dto

exte

ndm

ore

than

70fe

etbe

low

grou

ndle

velt

ore

ston

solid

bedr

ock.