Steel Roof Structure Terminology

Some of these can support the roof and prevent ridge sagging and wall spreading.

Steel roof structure terminology.

The section has a web in the middle and two flanges. Eaves on a sloped roof the horizontal underside that projects out from the house wall. Sometimes called hat channel because of its shape. The line formed at the intersection of two adjacent sloping planes of a roof.

The roof steel structure in the terminal 2 building of yancheng nanyang airport has a large span and a considerably difficult construction. 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. 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. Structural steel having a yield stress in excess of 36 000 pounds per square inch.

Structural steel the structural elements that make up the frame that are essential to supporting the design loads e g. Glossary of steel terminology. 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. Valley the internal angle formed by two inclined slopes of a roof.

Batten or purlins can be 1 x2 x4 wood strips nailed to the roof or rafters upon which the roofing is attached. 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. Truss roof the prefabricated self supporting triangulated structural framework commonly used for all types of roofs. A metal v shaped gutter is fixed in this area to direct water to the gutter.

Beams columns braces plate trusses and fasteners. The width of the flanges is usually between 1 5 times and 3 times less than the depth of the web. Usually steel sections in the shape of i. 30 lb felt was the standard underlayment for quality metal roofing systems and is still used but has been replaced in many areas by the newer synthetic underlayments it is typically made of a polyester fleece and infused with tar.

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. To ensure construction safety a construction monitoring scheme was.