Resisting Uplift
Resisting Uplift
(OP)
Due to the lack of buildable lots in our area many of our clients are coming in with odd design shapes. For example a home 64X20. This leaves us no choice but to have some interior shear walls in the middle of these homes. It is not uncommom for uplift to be around 9 or 10 kps sometimes higher. Contractors have problems when we run foundations through the center of the house as it hampers access and if you were to design so that you had enough concrete to react 9kps, well use your own imagination at 150 psf. Does anyone have any creative solutions assuming we have no other walls to distribute shear forces to?
Code: 97 UBC
Code: 97 UBC






RE: Resisting Uplift
1. Continuous footings that tie into and engage other adjacent foundations.
2. Uplift anchors. Similar to tiebacks in retaining wall construction, but installed vertically. Helical piles seem to work well.
3. Count on more tributary area for uplift than for downward loading. In order for the wall or frame to overturn, it has to take the adjacent framing with it.
RE: Resisting Uplift
RE: Resisting Uplift
RE: Resisting Uplift
I've used a concrete tie beam across the foundation. Maybe this can work multiple ways in the structural system.
RE: Resisting Uplift