Steel Roof Structure Terminology

The width of the flanges is usually between 1 5 times and 3 times less than the depth of the web.

Steel roof structure terminology.

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. A floor or roof covering made out of gage metal attached by welding or mechanical means to joists beams purlins or other structural members and can be galvanized painted or unpainted. A building product which supplements a basic solid panel building such as a door window light transmitting panel roof vent cupola soffit wainscot overhang etc. Also known as slope pitch is the measure of how steep a roof is.

A roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. Basic terms and descriptions. Metal buildings a brief history technology terminology. Usually steel sections in the shape of i.

The terms pitch and slope are simply two different ways of expressing the same measurement. A metal v shaped gutter is fixed in this area to direct water to the gutter. Valley the internal angle formed by two inclined slopes of a roof. As a result of these name changes there has arisen confusion are we talking about a structural steel building a modular building a prefabricated building a pre engineered.

Terminology commonly used in the metal building industry. 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. That portion of the roof structure that extends beyond the exterior walls of a building. Architectural roofing is metal roofing systems that are non weightload bearing and must be installed over solid decking rather than battens or purlins.

Truss roof the prefabricated self supporting triangulated structural framework commonly used for all types of roofs. Deck type the specific type of deck to be specified such as type b wide rib type f intermediate type n deep rib type a narrow rib composite. The section has a web in the middle and two flanges. For example if a roof is a 4 12 pitch the roof rises 4 inches for every horizontal run of 12 inches.

The same roof has a 4 12 or 1 3 pitch. 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. Metal roofing always has this feature.