Is There A Difference Between Floor Joists And Trusses

The joist also called bandsill supports the load which the floor is built to bear.

Is there a difference between floor joists and trusses.

What s the difference between joist and truss. The dimensional stability of tji joists help them resist warping twisting and shrinking that can lead to squeaky floors. Trusses are of many types. Trus joist tji joists are a key part of making a high performance floor.

While joists support the weight of floors and ceilings trusses have a wide variety of applications including supporting roofs and in bridge design. Trusses and rafters have many common parts including the sloping rafter boards and a bottom joists that form the ceiling of the space below. When there is an issue with the floor truss expect some type of delay. Joists joists are supports that run between walls or beams to support the weight of floors roofs and ceilings.

Residential construction has seen a tremendous increase in the use of floor trusses over the past several years. As nouns the difference between truss and joist is that truss is baggage while joist is 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. However most of the increase results from the national builders market share growth. Though i joist sales per housing start have increased about 6 over the last two years the trend has slowed considerably.

Floor trusses are not to be confused with the traditional construction method of using floor joists. Some of the small gain is due to the continuation of the replacement of solid sawn joists. The major functional difference between the two is that trusses are built mostly with 2x4s in place of the wider dimensional boards. The advantages of open web floor trusses are beginning to decelerate the growth of ewp.

However in canada the most common material used in residential framing is wood so that is the material we will discuss here. Tji joists are lightweight and come in long lengths which makes them faster and easier to install than traditional framing and saves you both. 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. Joists are used in floors and as column support.

It is like the skeleton a building. The simplest is a planar truss which is used as a roof supp. Hopefully with these few detailed examples of both. Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.

Although both are systems designed to provide structural support to a floor system the two are markedly different in a number of ways. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example. The truss has to be designed sealed built and then delivered from the same truss manufacturer.