In structural steel or aluminum construction p urlins usually w shapes or channels transfer roof loads to the major structural elements supporting the roof.
Steel roof purlin design.
The type and spacing of purlins is a design consideration which depends upon the incident roof loads as well as the limiting lengths of sheeting to be used.
We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge.
The safe spans below are suitable for sheds and class 1 structures with the following assumptions.
Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern.
Next and the last video of this series will be on.
Cpe 0 9 and cpi 0 2.
The topic we want to discuss today is the purlin installation.
They give added support to the roof and also provide a nailing surface for the end panels and drip edge.
Roof purlin are members used to directly support roof sheeting materials and could be made of timber or steel.
In timber construction purlins are nailed to the rafter or supporting trusses while in steel roof construction they are welded or bolted to the rafters or trusses by the means of cleats.
They give added support to the roof and also provide a nailing surface for the end panels and drip edge.
Only design of purlin is explained in this video in a very simple way.
The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.
High pressure zones kl 1 5 and 2 0 included.
All spans to have 1 row of bridging.
Metal roof purlins are installed horizontally under metal roofs.
They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
The shape of cee purlins does not allow end lapping they are butted together.
Purlins are 2 by 4 feet and are installed much like metal roofing.
Engineered purlin metal mart offers a complete line of engineered purlin material.
Safe roof purlins spans.
Steel roof purlins and wall girts are produced and available in house.
Contact flexospan for information on custom purlin and girt structural steel dimensions.
Cee purlins are secondary steel framing members most commonly used as roof purlins wall girts and header jamb and sill for windows and doors on metal buildings.
Welded together they can be used as columns braces and ties.
Available in cee or zee shape red oxide primed or galvanized 16 14 or 12 gauge sizes from 4 up to 12 flange widths of 1 1 2 up to 4 cut to your specified lengths hole punching available load tables available for all material.
Purlins are 2 by 4 feet and are installed much like metal roofing.
Purlins are installed horizontally under metal roofs.
To watch how to calculate the load on purlin then plss watch this video.
