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Elevator producers

Refuse to

adjust salary for inflation

Lobby to suppress

unions' power

Found severe safety violations

Strike

Unions of maintenance workers

Conflict!

Companies satisfy all demands

Unsatisfied with compensation

Can't get

home

Old and disabled people

Evolution of

Elevator

Cities can

better deal with overpopulation

World

population

Tall

Buildings

Can use building as part of the brand

Companies

Trump Tower,

New York

Commercial

success

Architects

Technological

shaping!

Got more opportunities for creativity

Marina Bay Sands,

Singapore

Companies using building as their brand

Rockefeller Building

420 m/min (1922)

Electric-powered

elevator

Want something faster than ridiculous

12 m/min

General public

Conflict!

Invention of

safety systems

Social shaping!

Hydraulic

elevator

Counterbalance

type of elevator

Frost and Stutt

"Teagle"

Otis Safety

Break

Crystal Palace,

New York 1853

Being able to

enjoy views from

some altitude

Danger & Doubt

Tourists

in London

Afraid of such

elevators;

danger of

failure and

drop

Steam-powered

elevator

Building

owners

Making buildings

more appealing/

accessible

Conflict!

General public

Closure !

First elevators for (elite) passengers

Nobility

System

based

on the

screw drive

To avoid using

stairs

First elevator

for objects

1000 BC

Lifting

battering ram

to destroy a

fortress

Soldiers in Islamic Spain

ORIGIN OF ELEVATOR

A platform

powered by

men, animals

and mills.

230 BC

Construction teams in Ancient Rome

Transporting

heavy, objects, water

and

construction materials

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