Raised Floor in Flood Area, Drywall Framing, and Water in Holes

This Monday the Pole Barn Guru answers reader questions about post frame with a raised floor use in a flood area, framing for drywall in a post frame house, and post holes full of water could be bigger soil issue.

DEAR POLE BARN GURU: Do you have a kit that can be used in a flood area to raise floor about 10 feet. RAY in HOUSTON

DEAR RAY: Yes we do – they are stilt houses and have to be custom engineered for each individual circumstance. Rear more here: https://www.hansenpolebuildings.com/2017/09/stilt-houses/

 

DEAR POLE BARN GURU: We’re considering post frame construction for our residence. I’m sill researching and learning. One big question I have is: why does is seem like most people are putting stud walls against the exterior walls of the structure? Are the existing walls not sound enough to support the weight of drywall or wood finishing? Is it necessary for running plumbing/electrical? Is it overkill? WILL in ISLANDTON

DEAR WILL: Congratulations upon considering post frame construction as your structural design solution. Sadly, most kit providers and builders are selling building shells based upon cheapest price, rather than meeting their client’s needs. With this low price, most often comes what is known as externally mounted wall girts – wall framing to support siding being attached wide face to wind on outside of columns. While this is quick, easy and takes little thought, it rarely meets Building Code requirements for meeting deflection criteria. There is a way to solve wall framing to be a one step process – bookshelf wall girts every 24 inches. This creates a very stiff wall structurally, provides an insulation cavity and requires no extra framing to add interior finishes.

 

DEAR POLE BARN GURU: Holes for barn posts were full of water. Installed drain tile and water ran off. Now the post holes are very soft and I don’t believe they will support the structure. Ideas? STEVE in FELCH

DEAR STEVE: If you place a 2×4 vertically in a hole and push downward on it and it just keeps sinking, you have a challenge going on. Your best solution then is going to be to hire a geotechnical engineer to visit your site and do a determination of how to adequately support your building based upon actual soil conditions. It may be able to be solved by use of larger diameter footings, or use of rebar within your slab (tied to columns), piers down to solid bedrock or some combination of these. Your building will only be as strong as your foundation, so this is not a place to mess around or guess.

Should your 2×4 above only go down a few inches, then you only need to remove loose soil at bottom of holes and pour concrete pads as indicated on your engineer sealed plans.

 

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