Flat Roof Truss Section

But flat roofs take a pounding from harsh weather which is why they rarely last as long as a good sloped roof.

Flat roof truss section. Flat roofs are always built at a slight incline at least 1 8 inch per foot. This type of truss is commonly used to construct roofs in houses. Pitched and flat roof trusses pitched and flat roof trusses with average loading and spacing of 15 to 20 ft are infrequently used for spans in excess of 80 ft. Roof trusses are engineered wood alternatives to hand framed rafters.

This difference is greater for long spans and or heavy loads. Some roofs actually slope in several directions ensuring optimal water runoff. For the same steel weight it is possible to get better performance in terms of resistance and stiffness with a truss than an i beam. The flat roof is economical to construct because ceiling joists are elimi nated and rafters are used to support both the roof and ceiling loads.

Figure 20 8 shows the materials commonly used to frame a flat roof. And their horizontal lines abound in the west and in urban areas. Widely known for producing a quality product for over 20 years barlow truss provide any type of wooden roof truss you need. A pitch truss with a truncated or flat apex so that it can support more load.

Economical spans are usually limited by the available sizes and lengths of solid sawed or glued laminated timber and by the potential capacity of the web member connections. They support live and dead loads by efficiently transferring the loads to the building walls or supports. Is a family owned and operated designer and manufacturer of wooden roof trusses in north central idaho. Figure 20 9 shows how a flat roof could be repre sented on the roof plan.

Examples of live loads are snow wind rain and temporary construction loads. Live loads are not always present. Traditional homes often have sections of flat roof over shed dormers above porches and garages and on balconies. Modern architecture has traditionally been characterized by flat roofs flat roofs create long horizontal planes reminiscent of the broad horizon line seen often in nature.

You can do this with a foam layer that exactly fits your roof. They re simple in form and function and are a good example of the modernist principle of clean lines. Often the flat roof has a slight pitch in the rafters. This will help you create a flat roof framing plan.

The modern flat roof.