Roof Members Details

The top members of a truss are known generically as the top chord bottom members as the bottom chord and the interior members as webs in historic carpentry the top chords are often called rafters and the bottom chord is often referred to as a tie beam there are two main types of timber roof trusses.

Roof members details.

Determining the length of a roof rafter a brace or any other member that forms the hypotenuse of an actual or imaginary right triangle. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework. Figure 2 5 view b shows you how the framing square is used to determine the length of the hypotenuse of a right triangle with the other sides each 12 inches. The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart.

In the uk a concrete tiled roof would normally have rafters at 600 mm 24 in centers roof battens at 300 mm 12 in centers and ceiling joists at 400 mm 16 in centers. Roof trusses provide support for the roof deck the framing and counteract wind load. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Commercial roofing specs and details find the resources you need to design the best roofing system for your project.

It is a waterproofing layer made of regular felt stacked above the solid. Roof trusses are generally fabricated offsite reducing price and speeding up the construction of your roof frame. Whether you re in the design phase or on the roof we can provide the tools and support to get the project done right.