[DOC] [TLE] J! Archive - Show #1273, aired 1990-02-28 [PAR] Jerome Siegel & Joe Shuster created this superhero when they were teenagers 
.... Metal beams, electric motors & this invention made the construction of... [DOC] [TLE] Skyscraper History - Infoplease [PAR] Then in 1853, an American inventor named Elisha Graves Otis developed a 
safety ... And later in the century, the switch to an electric motor made the elevator 
a ... A new method of building was developed that used a grid of steel beams and 
... 1973 while the tower was still under construction, when huge panels of glass,... [DOC] [TLE] How skyscraper is made - material, history, used, components ... [PAR] Among them were the ability to mass produce steel, the invention of safe and ... 
and 1930s, skyscraper development was further spurred by invention of electric 
arc ... The other primary raw material for skyscraper construction is steel, which is 
an .... 5 If steel columns and cross-bracing are used in the building, each beam is
... [DOC] [TLE] building construction - Early steel-frame high-rises | Britannica.com [PAR] Dec 9, 2014 ... Building construction is an ancient human activity. ... many floors, and timber 
piles (a Roman invention) were driven down to bedrock. ... the frame of rolled 
steel I beams with bolted or riveted connections, diagonal .... The development of 
the electric motor by George Westinghouse in 1887 made possible the... [DOC] [TLE] World Steel Association - Ever taller skyscrapers made possible by ... [PAR] Steel as a key construction material will inevitably have a role to play in the ... The 
use of steel made the evolution of skyscrapers possible by allowing them to 
reach ... steel beams and concrete act as support to the steel structure of the 
building ... The Willis Tower uses a tubular steel structure, a design concept 
invented by... [DOC] [TLE] Chicago School of Architecture: Skyscraper Design [PAR] Chicago School of Skyscraper Architecture (c.1880-1910): Adler & Sullivan, ... 
First, in the mid-1880s, came the introduction of the electric motor for Elisha Otis's 
safety ... army, to devise a foundation "raft" of timbers, steel beams, and iron I-
beams. ... made, Chicago architects invented a new set of skyscraper aesthetics, 
the... [DOC] [TLE] Building UP by Jill Jonnes  Winter 2012: Lessons of the Great ... [PAR] Jan 17, 2012 ... Skyscrapers, a love story. ... The skyscraper's ever greater heights were possible 
only because ... 1880s the electric motor was incorporated into inventor Elisha 
Otis's safety elevator ... the towers dislodged asbestos sprayed on the steel 
support beams to ... AboutContactWilson Center     Made with Marquee. [DOC] [TLE] Skyscrapers - Q-files Encyclopedia [PAR] Their weight is supported by a steel frame rather than outside walls. ... US) by 
Elisha Graves Otis in 1854 made it possible for people to get up tall buildings 
easily. ... It has a hull and core constructiona strong central concrete core with 
an open ... Lifts are winched up and down on a steel cable pulley by an electric 
motor. [DOC] [TLE] High-Rise Building Definition, Development, and Use - Elsevier Store [PAR] The tower was constructed using brick for stone and tar (asphalt) for mortar. .... 
motor by George Westinghouse in 1887 made possible the invention of the high-
speed .... vator, and the development of structural steel, gave rise to the 
skyscraper. 18 ... Composite floors comprise slabs and beams acting compositely 
together. [DOC] [TLE] Patent WO2008000054A1 - Autoliftable bridge crane system for ... [PAR] Jan 3, 2008 ... Skyscraper construction would be the branch of the civil construction industry .... 
Proposing a system of bridge cranes, the invention makes possible the ... cranes 
(01) fitted with movable winches (02) activated by electric motors. ..... These are 
small metal beams made in a range of stepped lengths, fitted to... [DOC] [TLE] Skyscrapers - ahky-referty.sk [PAR] Then in 1853, an American inventor named Elisha Graves Otis developed a 
safety ... And later in the century, the switch to an electric motor made the elevator 
a ... But in order

Question: Metal beams, electric motors & this invention made the construction of skyscrapers possible
Answer: Elevator