An awning or overhang is a secondary covering attached to the exterior wall of a building. It is typically composed of canvas woven of acrylic, cotton or polyester yarn, or vinyl laminated to polyester fabric that is stretched tightly over a light structure of aluminium, iron or steel, possibly coot or transparent material (used to cover solar thermal
panels in the summer, but that must allow as much light as possible in
the winter).
The configuration of this structure is something of a truss, space frame or planar frame. Awnings are also often constructed of aluminium understucture with aluminium sheeting.
These aluminium awnings are often used when a fabric awning is not a
practical application where snow load as well as wind loads may be a
factor.
The location of an awning on a building may be above a window, a door, or above the area along a sidewalk. With the addition of columns an awning becomes a canopy, which is able to extend further from a building, as in the case of an entrance to a hotel. Restaurants
often use awnings broad enough to cover substantial outdoor area for
outdoor dining, parties, or reception.
In commercial buildings, an
awning is often painted with information as to the name, business, and address, thus acting as a sign or billboard as well as providing shade, breaking strong winds,
and protecting from rain or snow. In areas with wintry weather, most
awnings do not have to be taken down at the end of the summer – they can
remain retracted against the building all winter long, or be designed
and built for those conditions.
Types :
Propulsion
Wind tolerance and construction
Aluminium awnings
Retractable awnings
Retractable patio cover systems
Retractable lateral arm awnings
Retractable side or drop arm awnings
Portable, pop-up canopies
Retractable solar shade screens
Retractable solar window awnings
Shade sails
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