Roof Joist Definition

Joists are traditionally made from timber.

Roof joist definition. A joist is a horizontal structural member used in framing to span an open space often between beams that subsequently transfer loads to vertical members. Joists are often doubled or tripled placed side by side where conditions warrant such as where wall partitions require support. Joists are either made of wood engineered wood or ste. The design span is the length of the joist measured from the face of the supports at either end.

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 simplest is a planar truss which is used as a roof support system. Called according to its position or use binding joist bridging joist ceiling joist trimming joist etc. A roof joist is a structural member which provides support for the roof and distributes its weight so that it is even.

When incorporated into a floor framing system joists serve to provide stiffness to the subfloor sheathing allowing it to function as a horizontal diaphragm. When sizing a joist or determining its span builders must examine the design span rather than the total span. To fit or furnish. Any of the small timbers or metal beams ranged parallel from wall to wall in a structure to support a floor or ceiling.

Of double framed floor under double a. The joist also called bandsill supports the load which the floor is built to bear. It is like the skeleton a building. 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.

Joists may make up the structural framing of a roof. A long thick piece of wood metal or concrete used in buildings to support a floor or ceiling. Joist noun a piece of timber laid horizontally or nearly so to which the planks of the floor or the laths or furring strips of a ceiling are nailed.