The Purpose Of Roof Framing Is

The main decision that needs to be made with erecting a roof is which material to use for its construction.

The purpose of roof framing is.

Sloped to shed water. Timber vs metal frames. Purlin plates are beams which support the mid span of rafters and are supported by posts. Framing in construction is the fitting together of pieces to give a structure support and shape.

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. Collar ties rafter ties tension beams structural ridge beams. This chapter will familiarize carpenters with the most common types of roof construction and materials. 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.

Also called the bird s mouth. Some of these can support the roof and prevent ridge sagging and wall spreading. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Framing materials are usually wood engineered wood or structural steel the alternative to framed construction is generally called mass wall construction where horizontal layers of stacked materials such as log building masonry rammed earth adobe etc.

Are used without framing. By supporting the rafters they allow longer spans than the rafters alone. The roof s main purpose is to keep out the rain cold or heat. Timber is by far the most common material for house framing in australia.

A purlin plate in wood construction is also called an arcade plate in european english under purlin and principal purlin. A horizontal member of a roof frame that is placed on edge at the ridge and into which the upper ends of rafters are fastened. A type of roof that slopes in one direction only. It is a waterproofing layer made of regular felt stacked above the solid.

The term plate means a major horizontal supporting timber. And in areas of heavy snow it must be constructed more rigidly to bear the extra weight. A cut on the rafter that is a combination of a level cut and a plumb cut.