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Eaves must be designed for local wind speeds as the overhang can significantly increase the wind loading on the roof. [7] The line on the ground under the outer edge of the eaves is the eavesdrip, or dripline, and in typical building planning regulations defines the extent of the building and cannot oversail the property boundary.
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.
Overhangs on two sides of Pennsylvania Dutch barns protect doors, windows, and other lower-level structures. Overhangs on all four sides of barns and larger, older farmhouses are common in Swiss architecture. An overhanging eave is the edge of a roof, protruding outwards from the side of the building, generally to provide weather protection.
Its function is similar to that of overhangs or eaves; it adorns and protects entrances, arches, and windows from the outside elements, and provides shade from radiation. [2] Chhajjas also aid in the facade-making in Rajasthani architecture. [2] Some styles of roof can be considered large chhajja as well. [1]
A piece added at the foot to create an overhang or change the roof pitch is called a sprocket, or coyau in French. The projecting piece on the gable of a building forming an overhang is called a lookout. A rafter can be reinforced with a strut, principal purlin, collar beam, or, rarely, an auxiliary rafter (see below). Rafter types include:
Cornice of Maison Carrée (Nîmes, France), a Roman temple in the Corinthian order, with dentils nearest the wall.. In Ancient Greek architecture and its successors using the classical orders in the tradition of classical architecture, the cornice is the topmost element of the entablature, which consists (from top to bottom) of the cornice, the frieze, and the architrave.
Simple gable roofs are also problematic, as the lower low eaves made possible by a shallow pitched hip roof provide the opportunity for both shade and rain protection in the form of an overhang or latticed porch. The shade these create keeps a structure cooler, their covered space is an attractive place for relaxation and escape from heat ...
The roofs of the three-bay barns frequently have no overhang on the eaves or sidewalls, but some New England barns have original, built in roof overhangs. There is a rare class of barn which are framed like an English barn but originally designed with the doors on the gable end.