Using Pressure Treated Wood For Floor Joists

The first piece of lumber commonly attached to the top of a house foundation is often called a sill plate.

Using pressure treated wood for floor joists.

Be sure also to use ground contact pressure treated wood for any framing that will touch the ground. The allowable stresses of pt lumber are lower than non treated lumber which means it can not span as far. But the 2015 irc included a new one table r507 5 that will make it easy for deck builders to spec a joist size for a given span and joist spacing. 45 mm 1 70 mm 1 95 mm 1 120 mm 1.

Girders in crawl spaces are closer than 12 to the ground. You can watch an informative video that shows a treated lumber sill plate and how it rests on a foundation. Use decay resistant wood. However doing this does not fix the slant that the floor has taken since the old joists got damaged.

Any wood on a foundation wall and is less than 8 from the exposed ground. Until a few years ago the irc didn t have deck joist span tables. 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. 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.

Yes pt lumber can be used for framing including floors. Take some extra time and jack the damaged area up so that the new lumber doesn t need to be notched. The ends of wood girders entering into masonry foundation walls with less than 1 2 clearance. Pressure treated lumber is also essential for exposed areas of the shed that may be exposed to the weather and water.

The table includes spans for. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber. Exterior grade nails can be used but heavy traffic will cause them to slightly flex out and eventually. Decks get wet and may be framed with incised treated lumber so spans may have to be adjusted.

A floor close to the ground won t last as long using non pressure treated wood. Interior walls are within a climate controlled environment and are presumed to be free of moisture. Kiln dried treated carcassing 9 width. Also pt lumber is corrosive so connections need to be such that they resist corr.

Floor joists in crawl spaces are closer than 18 to the ground. Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. Just click here sill plate video. Cleaning equipment pressure washers vacuum cleaners dryers floor cleaning.

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