Roof Ceiling Joists

Ceiling joists are normally horizontal members however under special circumstances they can be fixed on a slope.

Roof ceiling joists.

The roof joist is what makes up the ceiling of a home. Ceiling joists provide support for more than one surface in your home. They are spaced according to the material they support. The other surfaces are the walls which the joists span the distance between providing a source of support to keep the walls from shifting.

The first surface is unsurprisingly the ceiling the materials of which attach directly to the joists. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. A broken roof joist is a serious problem that must be taken care of immediately. If this is the case with your structure use the floor joist table to determine maximum joist length load.

Ceiling joist spans for southern yellow pine douglas fir and eastern spruce. Before we look at these tables we need to make sure the correct design loads are determined prior to selecting the correct table. 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. Standard size of joists.

Joists are traditionally made from timber. These span tables list allowable ceiling joist spans for common lumber sizes based on what design load scenario is applied. 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. Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists.

They are used to support a ceiling above or the floor below. The joists are horizontal pieces of lumber that span the distance from one side of the home to the other.