Hairpin in Metal Building Slabs
Hairpin in Metal Building Slabs
(OP)
How do you deal with lateral forces (thrust) in a metal building frame that is at the corner of the building? With the center frames there is plenty of room to put a hairpin. Is the only option a tie between the columns? Thanks for the insight.






RE: Hairpin in Metal Building Slabs
RE: Hairpin in Metal Building Slabs
A hairpin is a piece of rebar bent in the shape of a hairpin to resist thrust forces. They are usually found in slabs and foundations
RE: Hairpin in Metal Building Slabs
RE: Hairpin in Metal Building Slabs
Please note that the use of hairpins is typically for the smaller, shorter span metal buildings.
RE: Hairpin in Metal Building Slabs
DaveAtkins
RE: Hairpin in Metal Building Slabs
I agree with jike and DaveAtkins, I have used this detail. Another detail I have used is instead of using a "Vee" shaped hairpin, straighten out one leg of the "Vee" so that it is parallel to the outside face of the grade beam (the other leg is still at a 30 or 45 degree angle).
RE: Hairpin in Metal Building Slabs
RE: Hairpin in Metal Building Slabs
If you specifically need to design the gable frame as a portal (for example if you are designing for future extension), you could simply design the foundation to resist this horizontal load in addition to the vertical load.
VB