Ads
related to: collar tie vs rafters for roof tiles
Search results
Results From The WOW.Com Content Network
The simplest form of roof framing is a common rafter roof. This roof framing has nothing but rafters and a tie beam at the bottoms of the rafters. The next step in the development of roof framing was to add a collar, called a collar beam roof. Collar beam roofs are suitable for spans up to around (4.5 meters). [5]
Key: 1: principal rafters, 2: collar beam, 3: arch braces. Lacking a tie beam, [11] the arch-braced (arched brace) [12] truss gives a more open look to the interior of the roof. The principal rafters are linked by a collar beam supported by a pair of arch braces, which stiffen the structure and help to transmit the weight of the roof down ...
This is accomplished by using metal ties fastened to each rafter or truss. This is not normally a problem in areas not prone to high wind or extreme weather conditions. In the UK, a concrete tiled roof would normally have rafters at 600 mm (24 in) centers, roof battens at 300 mm (12 in) centers and ceiling joists at 400 mm (16 in) centers.
A lack of rafter ties is a serious structural issue in a conventionally-framed roof. The 15th-century tie-beam roof at St Mary's Church, Radnage, Buckinghamshire in England. A wooden beam serving this purpose is known as a tie-beam, and a roof incorporating tie-beams is known as a tie-beam roof. [10]
A hammer-beam is a form of timber roof truss, allowing a hammerbeam roof to span greater than the length of any individual piece of timber.In place of a normal tie beam spanning the entire width of the roof, short beams – the hammer beams – are supported by curved braces from the wall, and hammer posts or arch-braces are built on top to support the rafters and typically a collar beam.
Crown post roof in the solar at Old Soar Manor in 2009: the crown post is the upright above the tie beam. It carries a beam called the crown plate which in turn supports the collar beams. There are braces between the collar beams and common rafters and from the crown posts to these braces.
Ad
related to: collar tie vs rafters for roof tiles