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If you`ve ever watched the show `life after people` that is how our buildings would slowly be ruduced to rubble. Concrete is porous and water would seep into it, contact the rebar inside (or in this case a support beam) and rust it away.....
I've watched the show several time and each time it gave me the creeps.
It would seem the above floor was a parking lot. You would think it would have been underground instead of above.
I believe they rush while building it. Time is money they say.
The load of a car isn't on 6 feet x 10 feet, it's only on the part of the 4 tires touching the ground. Cars also bring in salt and oil deposits that weaken the surface......and actually, cars aren't that heavy when you calculate their pounds per sq ft/inch....figure a 3000 lb car measures about 6 feet x 10 feet that's 60 sq ft. that's about 50 lbs psf. a person is about 3 sq ft and is around 150 lbs...50 lbs psf....
The load of a car isn't on 6 feet x 10 feet, it's only on the part of the 4 tires touching the ground. Cars also bring in salt and oil deposits that weaken the surface.
No pissing match, I'll ask an engineer if I remember.that's true, but the tires are spaced apart over that 60 sq ft and the load rating of the pad they are sitting on is evenly distributed over the entire area, it isn't supported just under the tires.....btw, before you start a pissing match, talk to an engineer, that's how they calculate the load rating on a parking structure....i know this because I asked this very question of one I used to work with......
Did you know that when calculating the live load on a structure that will be used by people they don't use simply the size of a person's feet? they use the approximate area the person would occupy. THey also calculate 200 lbs psf since you don't really know the size of a person who will be using the structure.
Falling concrete from Gardiner Expressway hits car
The damaged car was driving beneath the Gardiner Expressway on Lakeshore Blvd. at Yonge St. when a chunk of falling concrete smashed through its windshield.
No one was injured in the incident, Staff Sgt. Warren Stein said.
The driver of the vehicle called police around 10:30 a.m. after the concrete shattered their car's windshield.
Reports of falling concrete from the belly of the Gardiner Expressway have come in since May 7. Until now, no vehicles had been hit by the falling debris