Cavity BarrierĮither timber/wire reinforced mineral wool blanket or polythene sleeved mineral wool used to seal off the cavities into zones Chevron Bracingĭiagonal bracing that is nailed to the truss in the plane of specified webs to add stability to a roof Concrete ScreenĪn in situ flooring of cement mortar that is laid to an accurate flat surface through screeding. The part of a structural member or truss that extends beyond it’s bearing. CamberĪn upward vertical displacement built into a truss that will compensate for any anticipated deflection caused by applied loads. The person responsible for the structural stability and integrity of a building as a whole. Galvanised steel lintels that get fixed to the external timber frame panel and support brickwork, blockwork over the window and door openings in timber frames. It does not however allow the passing of vapour in the opposite direction. BracingĪ man made materials that is usually attached to the outside face of an external timber frame panel that allows water vapour to pass through from the inside to the outside of a timber frame wall. The lower member of a Truss, normally horizontal, which carries the ceiling construction, storage loads and water tank. BirdsmouthĪ notch in the underside of a loose rafter to allow a Horizontal setting at a point of support (not usually used On Truss Rafters except with a Raised Tie Truss). The part of a truss receiving structural support, usually a wallplate but can be an internal wall etc. Bearerĭesigned to distribute loads across a number of trusses Bearing These are small timber members spanning over roof trusses to help support tiles, slates and any other type of material that may be used. Uncommon build type in the UK for timber frame where the panels are built to roof/wall plate level and the floor is then hung internally from pole plates or hangers. Timber sections are generally larger than a standard Truss. Characterised by a central, habitable area free from web members.

Asymmetric TrussĪ truss that has two rafters that meet at the APEX, which has a different pitch on both sides Attic Truss/Room-in-the-RoofĪ Truss forming the storey of a dwelling.

Rafter raised tie roof