Awnings, Canopies & Tents

An awning 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 aluminum, iron or steel or possibly wood. more...

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The configuration of this structure is something of a truss, space frame or planar frame. Awnings are also often constructed of aluminum understucture with aluminum sheeting. These aluminum 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 in addition to providing shade from the sun, break from steep winds and protection 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.

History

Awnings were first used by the ancient Egyptian and Syrian civilizations. They are described as "woven mats" that shaded market stalls and homes. A Roman poet Lucretius, in 50 BC, said "Linen-awning, stretched, over mighty theatres, gives forth at times, a cracking roar, when much 'tis beaten about, betwixt the poles and cross-beams".

North America

They became common during the first half of the 19th century. At that time they consisted of timber or cast iron posts set along the sidewalk edge and linked by a front cross bar. To lend support to larger installations, angled rafters linked the front cross bar to the building facade. The upper end of the canvas was connected to the facade with nails, with grommets and hooks, or by lacing the canvas to a head rod bolted to the facade. The other (projecting) end of the canvas was draped over, or laced to, a front bar with the edge often hanging down to form a valance. On ornate examples, metal posts were adorned with filigree and the tops decorated with spear ends, balls or other embellishments. On overcast days or when rain did not threaten, the covering was often rolled up against the building facade; during the winter months proper maintenance called for the removal and storage of awnings. Photographs from the mid-1800s often show the bare framework, suggesting that the covering was extended only when necessary. Canvas duck was the predominant awning fabric. A strong, closely woven cotton cloth used for centuries to make tents and sails.

Read more at Wikipedia.org