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.

The section has a web in the middle and two flanges. Glossary of steel terminology. Truss roof the prefabricated self supporting triangulated structural framework commonly used for all types of roofs. 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.

Valley the internal angle formed by two inclined slopes of a roof. A metal v shaped gutter is fixed in this area to direct water to the gutter. Structural steel the structural elements that make up the frame that are essential to supporting the design loads e g. Sometimes called hat channel because of its shape.

The line formed at the intersection of two adjacent sloping planes of a roof. To ensure construction safety a construction monitoring scheme was. 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. 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.

The vertical framing members located at the sides of an opening. 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. The width of the flanges is usually between 1 5 times and 3 times less than the depth of the web. Beams columns braces plate trusses and fasteners.

The connecting area of a column and roof beam of a structural frame such as a rigid frame. Structural steel having a yield stress in excess of 36 000 pounds per square inch. Eaves on a sloped roof the horizontal underside that projects out from the house wall. Steel sections angels channels w shapes etc which are formed by rolling mills while the steel is in a semi molten state.

Usually steel sections in the shape of i. 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 shapes standard steel configurations produced by steel mills such as wide flanges channels angles pipe tubes etc. Architectural roofing is metal roofing systems that are non weightload bearing and must be installed over solid decking rather than battens or purlins.

Batten or purlins can be 1 x2 x4 wood strips nailed to the roof or rafters upon which the roofing is attached.