What are Metsec purlins?
Metsec’s Purlins Division is the UK’s largest designer and manufacturer of light gauge galvanised steel purlins, side rails and mezzanine floor systems.
What are the sections normally used as purlins?
Channels, angle sections, and old formed Z-sections are widely used as purlins.
How many types of purlin are there?
These types of purlins are having good structural properties and supersedes above two varieties of purlins. Sigma section purlins are built to shape a building shell structure’s walls and floor joists, making them also suitable for supporting the beams required for flooring.
What is a purlin structure?
In architecture, structural engineering or building, a purlin (or historically purline, purloyne, purling, perling) is a horizontal beam or bar used for structural support in buildings, most commonly in a roof. Purlins are supported either by rafters or the walls of the building.
How is purlin weight calculated?
WEIGHT (KGS ) = WIDTH X WIDTH X 0.00000785 X LENGTH. Example : A Square of size 25mm and length 1 metre then the weight shall be.
What type of member is purlin?
A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common purlin.
What is the difference between a joist and a purlin?
As nouns the difference between purlin and joist is that purlin is a longitudinal structural member two or more rafters of a roof while joist is a piece of timber laid horizontally, or nearly so, to which the planks of the floor, or the laths or furring strips of a ceiling, are nailed.
What is the minimum spacing of purlins?
How to Install Purlins. In order for the sheets to be easily fixed to the purlins, as a rough guide they should be at least 50mm wide. When positioned, roof purlins should be spaced no further than 1.2 metres apart when using sheeting with a thickness of 0.7mm, and 1 metre when using 0.5mm sheeting.
How far can you span Z purlins?
A four-inch purlin can span 12 feet. A six-inch purlin can span 18 feet. An eight-inch purlin can span 25 feet. A ten-inch purlin can span 30 feet.