Bathroom Floor Joists
Typically made of plywood or osb and ranging in thickness from 19 32 to 1 1 8 thick the subfloor is truly structural second only to joists in this respect.
Bathroom floor joists. If you have a concrete slab floor the slab may be considered the subfloor. To improve the strength of the subfloor these joins should be staggered. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
Beam and joist arrangements can form a supporting frame for a floor. A layer of 3 4 in. Beams are thicker and longer and are laid vertically.
True floor joist span calculations can only be made by a structural engineer or contractor. Bathroom floor joists in principle there would be no problem to lower the bathroom floor framing because you could build your bathroom floor safely using only 2 6 joists instead of the regular ones 2x8s that can be actually in the place. Sometimes a joist needs to be longer than one piece of timber.
As a joist bends downward the lower edge bends slightly to one side or the other. Continue this pattern across the subfloor. Plywood firmly fastened to the undersides of joists helps prevent this side to side bending and stiffens the floor.
Floor joists should be spaced no more than 16 inches 41 cm apart from center to center to provide adequate stability. Continue to step by step instructions. Joists are typically shorter and lay across the beams to give them horizontal support.
Make another notch every 16 inches 41 cm to confirm the distance between each next joist. The screws should be no more than 4 in. Drywall screws through the plywood and into joists.
So you can simply trim 2 inches off from the joist top edge. You ll learn how to find the high spots on your joists and the best way to plane your joists down. The subfloor is the bottom most layer and it rests on the joists.
Install the short end of the joist on one side for the first joist then swap sides for the second joist. We ll show you how to level a subfloor yourself using a straight edge and a plane. Use a tape measure to measure 16 inches 41 cm in from the edge of the rim joist and draw a small notch.
