Wood frame building over concrete tilt up
Wood frame building over concrete tilt up
(OP)
I have an architect who wants to put a one story wood frame building over a one story (20' high)concrete tilt up building. Three of the exterior wood shear walls would set on the tilt up walls, the fourth would be over a truss girder. The difference in textures and appearance is appealing to the architect.
Has anyone ever hear of this being done? I can't find any prohibitions to it in the code and think the only issue might be high seismic forces in the wood frame portion. This would also be an essential facility building.
Any thoughts?
Has anyone ever hear of this being done? I can't find any prohibitions to it in the code and think the only issue might be high seismic forces in the wood frame portion. This would also be an essential facility building.
Any thoughts?






RE: Wood frame building over concrete tilt up
1) I imagine that all of your wood to concrete anchorage would be via post installed anchors.
2) Bringing two distinctly different trades on will add cost. It might be a steep price to pay for some texture.
3) The wood diaphragm installed at the top of the tilt up may wind up being a transfer diaphragm for lateral loads.
4) You'll be inventing a lot of unconventional new details which always introduces some risk. Tread carefully.
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: Wood frame building over concrete tilt up
Depending on the year of the tilt-up design and reinforcing pattern, this could be a problem, particularly if it was designed using the PCA Slender Wall design procedure.
Mike McCann, PE, SE (WA)
RE: Wood frame building over concrete tilt up
RE: Wood frame building over concrete tilt up
RE: Wood frame building over concrete tilt up
RE: Wood frame building over concrete tilt up
Mike McCann, PE, SE (WA)
RE: Wood frame building over concrete tilt up
I'm only doing the feasibility study on this, so I thought I get input from other engineers. A tilt up specialist will probably get the design in the end.
RE: Wood frame building over concrete tilt up
RE: Wood frame building over concrete tilt up