Rafters

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Ridge rafters displaced in the base (blue)

A rafter is a special rafter on two intersecting roof surfaces when they form a roof ridge . The hip rafter is the counterpart to the valley rafter on a roof valley . A hip rafter is usually made of construction timber , but for higher loads and / or span, it is also made of profile steel . The carpenter makes a rafter as a connection point for the shifters in the roof structure , for example a hipped roof .

Special features and execution

Elaborated ridge point of a rafter

A hip rafter is longer and around half higher than a normal rafter on the same roof . It has a lower incline than the rafters and shifters of the adjacent roof surfaces. A rafter can be tilted in the room. In order to lie flat in both adjoining roof areas, it must be trimmed or lowered. If a rafter does not run to the eaves, it is said to have decayed . The eaves section of a rafter can be given a hexagon cut in order to be able to attach a circumferential eaves plank or to obtain a uniform appearance. For the determination of the two portions of the claws and the burring , it is necessary a plan and a profile of the roof to tear . Tearing open and scribing rafters are part of the craft technology Schiftung .

literature

  • Bund Deutscher Zimmermeister (Ed.): Training in the carpenter's trade . Writing according to the area method. Bruderverlag, 1998.

Individual evidence

  1. ^ Schneider (Hrsg.): Construction tables for engineers . Werner Verlag, 2004, p. 4.128 .