Roof Celine Joists

Ceiling joist spans for southern yellow pine douglas fir and eastern spruce joist span tables use these tables to determine lengths sizes and spacing of ceiling joists.

Roof celine joists.

Ceiling joist loads ceiling joists are sized based on one of two tables found in the code. These joists are below the beam and are tied to it by 2x4. The joists are horizontal pieces of lumber that span the distance from one side of the home to the other. Joists are traditionally made from timber.

The ceiling joist 2x4s are running at right angles to the beam and rafters across the 12ft span of the room. The roof joist is what makes up the ceiling of a home. They are used to support a ceiling above or the floor below. In this design the tops of the rafters attach to a load bearing ridge beam that runs along the length of the roof.

A structural ridge is the standard alternative to ceiling joists. A broken roof joist is a serious problem that must be taken care of immediately. We were told that the joists are not providing structural support and were merely for affixing the flat ceiling. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor.

They are nominally 2 inches thick actual width usually 1 1 2 inches and come in a variety of widths from 8 to 12 inches.