Plywood Floor Joist Spacing

Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span.

Plywood floor joist spacing.

There is a picture of this below. It is possible to build with wider spacing. A 3 4 inch sheet of plywood weighs approximately 75 lbs. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.

For example in the 50 s and 60 s many homes were built with 4x10 joists at 4 oc. But larger is not always better when builders are constructing a home or adding a room addition. Your goal is to have the plywood end exactly half way across the joist so that the new plywood can start on this spot. Floor joist spacing has traditionally been 24 inches on center or from center to center of the joists.

The answer is that it depends on several factors. The vast majority of floor joist systems are built with 16 oc on center spacing. However such construction used 2x6 t g or 1 and 1 4 plywood subfloor material. Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.

Measure and dry set the first piece. So how far apart should floor joist be for a shed. Newer construction has floor joists spaced at 16 inches on center.