Hairpin & Floor Mesh Reinforcing
Hairpin & Floor Mesh Reinforcing
(OP)
I've been designing PEMB (Pre-Engineered Metal Building) foundations with hairpins for 20 years.
I've always specified either #4 bar at 12" o.c. or less or 6x6-#6 or #10 WWM.
The contractor informed me that the owner and sub-contractor want to use #4 at 24" o.c.
The numbers in my calcs work!
BUT... is there any concern for having the reinforcing at greater than 12" o.c.?
Thank you!
I've always specified either #4 bar at 12" o.c. or less or 6x6-#6 or #10 WWM.
The contractor informed me that the owner and sub-contractor want to use #4 at 24" o.c.
The numbers in my calcs work!
BUT... is there any concern for having the reinforcing at greater than 12" o.c.?
Thank you!






RE: Hairpin & Floor Mesh Reinforcing
A bit of a dilemma; if owner wants @24, I would send him a note that you would recommend against it and that your spacing is more appropriate. If you use your spacing make sure the sawcutting is done at the correct timing and that the contractor is aware that timing is critical. If you use your spacing and delay sawcutting, you will likely end up with unwanted cracks, the very thing you warned the client about...
Dik
RE: Hairpin & Floor Mesh Reinforcing
I would say: no. Hairpins are built around "engaging" a certain width of slab (with enough reinforcement to handle the force from the hairpin). If the slab is properly reinforced.....there should be no issue.
RE: Hairpin & Floor Mesh Reinforcing
Dik
RE: Hairpin & Floor Mesh Reinforcing
RE: Hairpin & Floor Mesh Reinforcing
Dik
RE: Hairpin & Floor Mesh Reinforcing
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Hairpin & Floor Mesh Reinforcing
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