Using Pressure Treated Wood For Floor Joists

Any wood on a foundation wall and is less than 8 from the exposed ground.

Using pressure treated wood for floor joists.

Floor joists in crawl spaces are closer than 18 to the ground. Cleaning equipment pressure washers vacuum cleaners dryers floor cleaning. Yes pt lumber can be used for framing including floors. This treated lumber is bolted to the foundation and the floor joists typically rest on it.

Just click here sill plate video. 45 mm 1 70 mm 1 95 mm 1 120 mm 1. Be sure also to use ground contact pressure treated wood for any framing that will touch the ground. The chemicals used in pressure treating lumber including fire retardant chemicals are corrosive to bare steel and could weakend joist hangers potentially leading to collapse during fire.

The first piece of lumber commonly attached to the top of a house foundation is often called a sill plate. A floor close to the ground won t last as long using non pressure treated wood. In situations when sistering damaged floor joists with lumber of similar dimensions it can be easy to notch and slide the sister board into place. Decks get wet and may be framed with incised treated lumber so spans may have to be adjusted.

Use pressure treated plywood that is attached to floor joists with exterior grade screws. Also pt lumber is corrosive so connections need to be such that they resist corr. You can watch an informative video that shows a treated lumber sill plate and how it rests on a foundation. Girders in crawl spaces are closer than 12 to the ground.

Take some extra time and jack the damaged area up so that the new lumber doesn t need to be notched. Until a few years ago the irc didn t have deck joist span tables. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber. Pressure treated lumber is also essential for exposed areas of the shed that may be exposed to the weather and water.

However doing this does not fix the slant that the floor has taken since the old joists got damaged. The allowable stresses of pt lumber are lower than non treated lumber which means it can not span as far. Kiln dried treated carcassing 9 width. Fsc standard kiln dried regularised c16 treated carcassing 220 x 45mm.

Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. The table includes spans for. Use decay resistant wood. Exterior grade nails can be used but heavy traffic will cause them to slightly flex out and eventually.

Interior walls are within a climate controlled environment and are presumed to be free of moisture.