huangyhg

site fire from woodwork to steelwork-re use my steelwork?
my dear pals
this is an experience worth sharing and your point of view will be highly appreciated. please allow me to post this one to steel engineering as well
a steel structure about 2 story high is assembled, floors and wall not yet clad, so it is lightweight.
on the ground, a pile of steel beams and trusses are stored next to a freshly removed pile of wood formwork removed from concrete walls.
and the pile of wood, big enough catches fire with the following consequences:
a) the pile of stacked up steel beams get all the heat, a few bend, the paint removed in some portions, blackened in others. none is completely burnt and so there is curvature due to temperature differences
b) the erected steelwork close to the pile of wood gets blackened but no distortions or deflections observed.
my judgement says:
1) the steel is not over heated since the paint can resist up to 200degrees celsius prior to complete flaking.here it is only blackened.
2)no remoulding happened because curvature of piled steelwork shows that the steel took an almost elastic shape.
3)the steel in some portion has hardened after uniform cooling in 20degree celsius air due to close contact with hot wood and air, but not to the extent that it can be brittle
so i can go on, correct the paint, the curvature with a little heat treatment and re-use my steel.
talking about a remote area and engineering limits with all the rationality, and no life safety concerned-only material behavior under fire and after fire
your discussion will be highly appreciated.
regs
find a job or post a job opening
you haven鈥檛 mentioned the type steel involved but you are in good shape unless you have something exotic in the way of structural steel. if the steel isn鈥檛 鈥渂urnt鈥? , chunks fly off when struck with a hammer you are ok.
i鈥檝e straightened many a piece of steel both in and out of position with no problems. it is done everyday even at the mills. just have someone well versed in the art straighten it and get the permission of everyone involved.
here are just two of the companies that do straightening. look at the column in steel straightening鈥檚 website.

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