Roof Ceiling Joists

The roof joist is what makes up the ceiling of a home.

Roof ceiling joists.

Joists are traditionally made from timber. Standard size of joists. Ceiling joists provide support for more than one surface in your home. If this is the case with your structure use the floor joist table to determine maximum joist length load.

A broken roof joist is a serious problem that must be taken care of immediately. These span tables list allowable ceiling joist spans for common lumber sizes based on what design load scenario is applied. The first surface is unsurprisingly the ceiling the materials of which attach directly to the joists. Before we look at these tables we need to make sure the correct design loads are determined prior to selecting the correct table.

They are used to support a ceiling above or the floor below. 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. The other surfaces are the walls which the joists span the distance between providing a source of support to keep the walls from shifting. 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.

Typically the material is plasterboard which can span 450 mm. They are spaced according to the material they support. Ceiling joist spans for southern yellow pine douglas fir and eastern spruce. The joists are horizontal pieces of lumber that span the distance from one side of the home to the other.

Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists. Ceiling joist loads ceiling joists are sized based on one of two tables found in the code.