Contractor Error Introduced Sweep in Steel Beam
Contractor Error Introduced Sweep in Steel Beam
(OP)
Good afternoon,
I am currently reviewing a construction deficiency and was hoping for some additional guidance. The contractor has installed a heavy W760 that spans ~8.0 m and has introduced a sweep in the top flange of approximately 25-50 mm and has installed the precast concrete floor. This exceeds the Permissible Variation in Straightness limitation of L/1000 in ASTM A6.
With this limitation in mind I am unsure how to proceed without removing the attached floor slab and having the structural steel contractor plumb the beam. Do you have any additional resources or suggestions on how one might proceed?
Thank you,
MF
I am currently reviewing a construction deficiency and was hoping for some additional guidance. The contractor has installed a heavy W760 that spans ~8.0 m and has introduced a sweep in the top flange of approximately 25-50 mm and has installed the precast concrete floor. This exceeds the Permissible Variation in Straightness limitation of L/1000 in ASTM A6.
With this limitation in mind I am unsure how to proceed without removing the attached floor slab and having the structural steel contractor plumb the beam. Do you have any additional resources or suggestions on how one might proceed?
Thank you,
MF






RE: Contractor Error Introduced Sweep in Steel Beam
RE: Contractor Error Introduced Sweep in Steel Beam
Are you the EOR for this job? If not, my first step would be to go ask them to review their calcs with the current condition in mind. For a beam with continuous top flange support (from the precast deck), there's a good chance it's OK structurally.
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The name is a long story -- just call me Lo.
RE: Contractor Error Introduced Sweep in Steel Beam
What do you mean by "sweep"? I'm not sure I get the situation here.
RE: Contractor Error Introduced Sweep in Steel Beam
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The name is a long story -- just call me Lo.
RE: Contractor Error Introduced Sweep in Steel Beam
Does it induce torsion into the beam that affects its integrity? If the answer to all of those questions is "no", I don't see a need for corrective action. If it needs to be straightened, I would consider using heat straightening. However, if you plan to straighten it, I would think you need to provide separation between the precast floor and the beam in order to allow the beam to move.