Roof Celine Joists

A broken roof joist is a serious problem that must be taken care of immediately.

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. Ceiling joist loads ceiling joists are sized based on one of two tables found in the code. Before we look at these tables we need to make sure the correct design loads are determined prior to selecting the correct table.

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. 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. 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.

These span tables list allowable ceiling joist spans for common lumber sizes based on what design load scenario is applied. In this design the tops of the rafters attach to a load bearing ridge beam that runs along the length of the roof. We were told that the joists are not providing structural support and were merely for affixing the flat ceiling. The roof joist is what makes up the ceiling of a home.

Joists are traditionally made from timber.