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.

The terms pitch and slope are simply two different ways of expressing the same measurement. That portion of the roof structure that extends beyond the exterior walls of a building. The section has a web in the middle and two flanges. 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.

For example if a roof is a 4 12 pitch the roof rises 4 inches for every horizontal run of 12 inches. 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. 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. Terminology commonly used in the metal building industry.

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. 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. 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. The terminology used to describe steel buildings over the years has changed as the technology for designing and producing these buildings has matured.

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. Architectural roofing is metal roofing systems that are non weightload bearing and must be installed over solid decking rather than battens or purlins. 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. Glossary of steel terminology. The same roof has a 4 12 or 1 3 pitch. Metal roofing always has this feature.

Valley the internal angle formed by two inclined slopes of a roof. A structure designed and constructed to house farm implements hay grain poultry livestock. Also known as slope pitch is the measure of how steep a roof is.