Timber Roof Structure Construction

Except in group f 1 h m and s 1 occupancies fire protection of structural members in roof construction shall not be required including protection of primary structural frame members roof framing and decking.

Timber roof structure construction.

Heavy timber rafters typically spaced 240 cm 8 ft to 370 cm 12 ft apart are called principal rafters. Are not normally required. The roof framing is the structure that supports your roof. But this type of roof is seldom as attractive as the pitched form as it can result in a blocky stunted appearance.

There are two basic methods of pitched roof construction. Uses relatively small timber sections. The supporting structure and the covering. We will then discuss the framing square and learn how it s used to solve some basic construction problems.

This house s roof construction used prefabricated trusses from turner timber with dormer windows factored into the design on the front elevation image credit. Fire resistance ratings of primary structural frame and bearing walls are permitted to be reduced by 1 hour where supporting a roof only. We work in commercial and industrial construction and specialize in glulam beam panelized roof structures wood floor systems and seismic retrofit work. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc.

Timber is by far the most common material for house framing in australia. But before discussing roof framing we will first review some basic terms and definitions used in roof construction. There are two basic components of a timber roof. Finishes for flat roofs are also more limited.

Fire resistance ratings of primary structural frame and bearing walls are permitted to be reduced by 1 hour where supporting a roof only. Archibald timber structures started into business in 1981 and incorporated in 1984. The roof structure is integral to the design of the roof cassettes so trusses beams joists purlins etc. A truss roof using factory made trusses which are delivered to site complete and just erected.

Pre manufactured roof trusses come in a wide variety of styles. Timber vs metal frames. Roof framing in this chapter we will introduce you to the fundamentals of roof design and construction. Trussed roofs are available in fink truss and open or attic truss options detailed below.

They are designed by the manufacturer for each specific building. Except in group a e f 1 h i l m r 1 r 2 r 2 1 and s 1 occupancies high rise buildings and other applications listed in section 1 11 regulated by the office of the state fire marshal fire protection of primary structural. 1 foot 304 8 mm. Timber trusses also are built in a variety of styles using wood or metal joints.

The main decision that needs to be made with erecting a roof is which material to use for its construction. For homebuilders a timber frame for a flat roof is usually the cheapest option and the easiest to build.