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.

The joists are horizontal pieces of lumber that span the distance from one side of the home to the other. These joists are below the beam and are tied to it by 2x4. The ceiling joist 2x4s are running at right angles to the beam and rafters across the 12ft span of the room. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor.

They are used to support a ceiling above or the floor below. A broken roof joist is a serious problem that must be taken care of immediately. The roof joist is what makes up the ceiling of a home. Ceiling joist loads ceiling joists are sized based on one of two tables found in the code.

A structural ridge is the standard alternative to ceiling joists. Joists are the parallel horizontal beams that run across an open space joining opposite walls in a building to support both the ceiling below and the floor above. Joists are traditionally made from timber. In this design the tops of the rafters attach to a load bearing ridge beam that runs along the length of the roof.

Before we look at these tables we need to make sure the correct design loads are determined prior to selecting the correct table.