Roof Joist Vs Truss

However in canada the most common material used in residential framing is wood so that is the material we will discuss here.

Roof joist vs truss.

Trusses are gradually replacing the conventional rafters to the point that nowadays more than 80 percent of new residential construction uses trusses to support the roof. It is like the skeleton a building. Roof framing has undergone a quiet revolution over the past half century. Both floor trusses and floor joist systems provide suitable structural support.

The simplest is a planar truss which is used as a roof support system. Joists joists are supports that run between walls or beams to support the weight of floors roofs and ceilings. This structural support comes in the form of roofing joists ceiling joists rafters or trusses and can be made from a variety of materials including wood metal reinforced concrete etc. Because they are manufactured off site according to the specifications of the project the need for alterations is almost completely eliminated.

As trusses are prefabricated they may be costlier than rafters however the installation and labor cost involved in roof rafters is comparatively higher than trusses. While joists support the weight of floors and ceilings trusses have a wide variety of applications including supporting roofs and in bridge design. Floor trusses though are an economical alternative to joists. These triangulated structures with a high degree of strength and stability due to the geometry used form both the joist and rafter components of a building.

Why has this change occurred and what are the advantages and disadvantages of rafters vs trusses. Joists are used in floors and as column support. Roof trusses in many modern construction projects prefabricated roof trusses are used. The joist also called bandsill supports the load which the floor is built to bear.

Trusses are of many types.