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A soffit is an exterior architectural feature, generally the horizontal, aloft underside of the roof edge. Its archetypal form, sometimes incorporating or implying the projection of rafters or trusses over the exterior of supporting walls, is the underside of eaves (to connect a supporting wall to projecting edge(s) of the roof ).
The finished surface below the fascia and rafters is called the soffit or eave. In classical architecture, the fascia is the plain, wide band (or bands) that make up the architrave section of the entablature, directly above the columns. The guttae or drip edge was mounted on the fascia in the Doric order, below the triglyph.
Soffit Any architectural element's underside, especially the board connecting the walls of a structure to the fascia or the end of the roof, enclosing the eave. Sommer or Summer A girder or main "summer beam" of a floor: if supported on two storey posts and open below, also called a "bress" or "breast-summer".
The underside of the eaves may be filled with a horizontal soffit fixed at right angles to the wall, the soffit may be decorative but it also has the function of sealing the gap between the rafters from vermin and weather. Eaves must be designed for local wind speeds as the overhang can significantly increase the wind loading on the roof. [7]
The beams are continuously formed, so the length of the beam is limited only to the maximum length that can be handled and transported. Typical widths are 3 + 1 ⁄ 2, 5 + 1 ⁄ 4 or 7 inches (89, 133 or 178 mm); typical depths are 9 + 1 ⁄ 2, 11 + 7 ⁄ 8, 14, 16 and 18 inches (240, 300, 360, 410 and 460 mm). Typically the beams are made to a ...
Timber framing (German: Fachwerkbauweise) and "post-and-beam" construction are traditional methods of building with heavy timbers, creating structures using squared-off and carefully fitted and joined timbers with joints secured by large wooden pegs.
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In this example the lookouts are covered when the soffit is finished, as can be seen on the right hand side of the image. A lookout , [ 1 ] lookout rafter or roof outlooker [ 2 ] is a wooden joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface ...