Wood Frame Roof Structure

It is the form most commonly used by.

Wood frame roof structure.

Shed gable hip gambrel and mansard. Framing a roof is the last step in framing new construction. Bending for a roof floor or wall surface. Balloon framing was used until the mid 1950s.

Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. The majority of roofs are framed using wood trusses 1 with a few using wood with steel bracing. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

However it is also possible to build larger roofs using steel framing. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Wood frame construction is the predominant method of building homes and apartments in the united states enabling this nation to have the world s best housed popu lation. Common types of roofs and basic framing terms.

An example of each is shown in figure 2 1. Wood frame buildings are economical to build heat and cool and provide maximum. Gable a gable roof has a ridge at the center and slopes in two directions. Lumber grades lumber is graded in accordance with standardized grading rules that consider the effect of natural growth characteristics and defects such as knots.

While lumber may have a cost of 4 per board foot 2 steel may be as much as 8 a board foot 2. The united states is well supplied with timber and has a diversified industry that manufac tures lumber and other wood products used in the house. Collar ties rafter ties tension beams structural ridge beams. Steel has a much higher cost than wood nearly twice as much for materials.

Roofs are basically five types. Since the 1830s two methods of wood framing have been used to facilitate building a structure. Wood members are cut and joined to create floors walls and the roof of a structure according to the set of construction documents and local building codes. Balloon framing and platform framing.

Some of these can support the roof and prevent ridge sagging and wall spreading. Increasingly wood framing is also being used in com mercial and industrial buildings. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. The modern conventional wood frame house with wood or wood product covering materials is economical long lasting and can be constructed in any location.

Most wood used in light frame residential construction takes the form of dimension lumber.