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Originally Posted by vvq
funny thread we have here. lot of people arguing. none of which are engineers or even have college degrees in the subjects related to this discussion.
stick to porn guys.
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What makes you think no one in porn has an engineering degree?
I know of at least two of us that do.Shemp and I.
However,I only dabbled in metallurgy as a mechanical engineer primarily in tool steels,not construction grade matériels.There is quite a bit of technical information available online these days regarding the loss of tensile strength in low carbon(construction) steels when exposed to heat.It's certainly not a reach to see that the initial explosion destroyed enough of the ablative matériel on the truss clips to effectively reduce the holding power.Factor in that the plane itself severed at least 20% of the vertical structural members.The remaining columns took the load until the clips finally failed after being exposed to heat.(they anneal/get softer).
I've never heard anyone technically qualified talk about or run the numbers
on the inertia generated to calculate how fast a tower like that would actually collapse.My guess it would be iffy at best.These towers were not empty shells.Elevator shafts,HVAC,large diameter sprinkler pipes,furniture glass in tension.,etc....all these things would factor in.Logic says it would start slow,as each floor collapsed and the weight became greater it would gain momentum. If the planes would've hit lower on the structure,doing the same amount of initial damage,they would have collapsed much faster than they actually did.