Wood Roof Framing Elements

Roofs must also be strong enough to withstand high winds.

Wood roof framing elements.

The interconnection of all framing elements of the lateral and vertical force. Find out what the different parts of a roof frame are called and what purpose they serve. In this section we ll cover the most common types of roofs and. Deck exterior and interior load bearing walls beams girders posts and floor framing.

Transfers the loadof the roof through the raftersto walls below. The primary object of a roof in any climate is protection from the elements. Framing must transfer all gravity uplift and lateral loads to the foundation. Most wood used in light frame residential construction takes the form of dimensional lumber.

Wfcm 1 3 definitions continuous load path. Wfcm 2 1 2 a continuous load path shall be provided to transfer all lateral and vertical loads from the roof wall and floor systems to the foundation. Using i joists requires the same basic understanding of rafter layout and roof design. Ridge board ridge beam.

Parts of a roof decking or sheathing roof edge or eaves edge attic saddle ridge valley underlay membrane eaves membrane underlay membrane drip edge roof vents deflector plumbing vent flashing joint covers shingles. 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. Decking is 2 to 4 inches thick and loaded in the weak axis of bending for a roof floor or wall surface. A ridge board is a horizontal member of the roof frame.

The point at which all the raftersare attached to. Collar ties rafter ties tension beams structural ridge beams. Roof slope and rigidness are for shedding water and bearing any extra additional weight. Ridge board v s beam.

Some of these can support the roof and prevent ridge sagging and wall spreading. Ridge beam sits below the rafters. Supported by lally columns. Types of roofs and define common roof framing terms.

Parts of a roof. From purlins to beams props struts rafters ties crowns and fascias. Truss roof framing is cov ered in section 17 4. Roof components ridge truss static connection of the rafters rafter the basic load bearing component of the roof collar tie prevents rafters from moving roof battens these fasten the vapour barrier to the inside of the rafters interior lining is fastened onto them interior lining lining.

Posts and timbers are a minimum of 5 inches thick and the width does not exceed the thickness by more than 2 inches.