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Mechanical Properties
Mechanical Properties Metric Imperial
Tensile Strength, Ultimate 400 - 550 MPa 58000 - 79800 psi
Tensile Strength, Yield 250 MPa 36300 psi
Elongation at Break (in 200 mm) 20.0 % 20.0 %
Elongation at Break (in 50 mm) 23.0 % 23.0 %
Modulus of Elasticity 200 GPa 29000 ksi
Bulk Modulus (typical for steel) 140 GPa 20300 ksi
Poissons Ratio 0.260 0.260
Shear Modulus 79.3 GPa 11500 ksi
Ultimate Tensile Strength 572 MPa 83000 psi AA; Typical
Tensile Yield Strength 503 MPa 73000 psi AA; Typical
Elongation at Break 11 % 11 % AA; Typical; 1/16 in. (1.6 mm) Thickness
Elongation at Break 11 % 11 % AA; Typical; 1/2 in. (12.7 mm) Diameter
Modulus of Elasticity 71.7 GPa 10400 ksi AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Shear Modulus 26.9 GPa 3900 ksi
Shear Strength 331 MPa 48000 psi AA; Typical
randyvs
Do they make airplanes to with stand the impact of a building ?
Do they make buildings to with stand the impact of a plane ?
How much do blimps weigh Zaph ?
I can't believe you would even try to argue the point.
I'm still waiting for an explanation how a much lighter plane, going much slower, is going to somehow be able to go all the way through a concrete building, yet a much heavier plane, going much faster can't penetrate steel.
Please, tell me. Small planes can go through buildings, but larger heavier planes can't. That's amazing.
Because you claim that there's no way that a plane the size of a 767 can possibly have gone through the WTC. But yet we've seen much smaller lighter planes, going much slower, go into, and through buildings. So why couldn't the 767 do it, when they could?
Zaphod58
reply to post by randyvs
Because you claim that there's no way that a plane the size of a 767 can possibly have gone through the WTC. But yet we've seen much smaller lighter planes, going much slower, go into, and through buildings. So why couldn't the 767 do it, when they could?
leostokes
wmd_2008
leostokes
wmd_2008
leostokes
wmd_2008
reply to post by leostokes
Sure approx 96,000 tons of steel and about 80-90,000 tons of concrete for the floor slabs in each tower add in services ie pipework, cables, h&v, glazing and cladding it works out at about 220-235,000 tons in each tower.
Thanks for your reply. This link says 1,500,000 is the weight (of the two?) towers. Others say 500,000 tons each. Morgan Reynolds says 1,000,000.
WTC stats
Most of the 1,000,000 plus guesstimates are based on info regarding the cubic mtrs of concrete delivered to the site BUT that included things like the BATHTUB which is not part of the buildings also the floorslabs had a less dense mix of concrete than say would be used for a structural mix so the 220-235,000 ton estimates will be more accurate.
Ok. Next question is what did the structure weigh when it fell? Including all of the furnishings of the tenants?
WHY? it would be a LOW percentage of the total weight!
So that we can compare the twin towers with a known controlled demolition.
The Seattle King dome was 125,000 tons. When it collapsed due to controlled demolition it registered like a 2.3 earth quake. Compare this with the twin towers. If theirs was a controlled demolition one would expect a larger seismic number. It did not happen.
Furthermore, the twin towers produced only a single surface (seismic) wave unlike the King dome that produced the usual family of waves we see in an earth quake.
Also, the King dome collapse lasted 16.8 seconds. The wtc towers (seismic) wave lasted 8 or 9 seconds. One would expect the towers to last longer as they fell from a much greater height.
The King dome produced a dust cloud that was gone after 20 minutes.
The King dome produced a pile of rubble about 12% of the original height. The WTC rubble was about 4%. The volume of the towers was many times that of the King dome. Where is the rubble?edit on 3-12-2013 by leostokes because: (no reason given)edit on 3-12-2013 by leostokes because: (no reason given)
This damage was caused by a B-25 hitting the Empire State Building. It was traveling at low speed, as it was trying to land. One engine went completely through the building and out the other side.
Apples with Apples as the saying goes you CAN'T compare totally different structures as the same as for things like dust many on here claim steel was turned to dust BS, think of all the materials in the structure that could produce dust do you want that listed as well ?