Steel Roof Structure Terminology

The roof steel structure in the terminal 2 building of yancheng nanyang airport has a large span and a considerably difficult construction.

Steel roof structure terminology.

Eaves on a sloped roof the horizontal underside that projects out from the house wall. A proprietary reidsteel name for a patented form of tied arch with pitched or parabolic roof slopes which can be used to span large spans cost effectively. Usually steel sections in the shape of i. The section has a web in the middle and two flanges.

Sometimes called hat channel because of its shape. A metal v shaped gutter is fixed in this area to direct water to the gutter. Beams columns braces plate trusses and fasteners. Collar ties rafter ties tension beams structural ridge beams.

Architectural roofing is metal roofing systems that are non weightload bearing and must be installed over solid decking rather than battens or purlins. Terminology applied to structural steel members the use of these members the methods by which they are connected and the basic sequence of events which occurs during erection. Truss roof the prefabricated self supporting triangulated structural framework commonly used for all types of roofs. Valley the internal angle formed by two inclined slopes of a roof.

Some of these can support the roof and prevent ridge sagging and wall spreading. An l shaped metal strip positioned along a roof s edges to allow water to run off the roof without running down the eaves or siding. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. A roof that is formed by sloping planes from all four sides.

The line formed at the intersection of two adjacent sloping planes of a roof. To ensure construction safety a construction monitoring scheme was. The width of the flanges is usually between 1 5 times and 3 times less than the depth of the web. In some instances they are also steel lengths measuring about an inch or so wide that have an elevated middle where one screws the metal roofing into.

According to the project characteristics the construction scheme of the roof steel structure follows the principle of subareas and substeps with the truss lifting in segmentation. Structural steel the structural elements that make up the frame that are essential to supporting the design loads e g. Batten or purlins can be 1 x2 x4 wood strips nailed to the roof or rafters upon which the roofing is attached.