They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
Roof purlin dimensions.
Roof hugger retrofit sub purlins are zee shaped structural members that are typically 10 to 12 feet in length.
Purlin plates are beams which support the mid span of rafters and are supported by posts.
Metal roof purlins are installed horizontally under metal roofs.
They give added support to the roof and also provide a nailing surface for the end panels and drip edge.
Steel z purlins and z girts are also available with other depths and flange widths.
Steel roof purlins and wall girts are produced and available in house.
We manufacture any component from 1 2 steel subgirts to 12 section up to 10 gauge.
Secondary structural steel members z purlins and girts.
Like the z purlin the c purlin takes its name from its shape.
Pre engineered metal building components.
The standard of purlin length will vary anywhere between 100 to 300 mm while the thickness will vary anywhere between 1 to 3 mm.
Purlin plates in wooden construction.
Generally it will be manufactured due the requirement of the customers.
A purlin plate in wood construction is also called an arcade plate in european english under purlin and principal purlin.
Available in a variety of sectional properties lengths and sizes.
Z purlins and girts c purlins and girts eave struts open track angle purlin and girt clips standing seam roof panel.
The typical spacing standards for residential and commercial buildings are about 1 to 2 foot.
Metal mart offers a complete line of engineered purlin material.
They are made from 16 ga 0 060 min 50 ksi structural grade g 90 galvanized steel and specifically notched to fit over the ribs of the existing metal roof panels.
For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap.
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.
The term plate means a major horizontal supporting timber.
By supporting the rafters they allow longer spans than the rafters alone.
Purlins are 2 by 4 feet and are installed much like metal roofing.
Purlins are installed horizontally under metal roofs.
Purlins are 2 by 4 feet and are installed much like metal roofing.
For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.
They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
Contact flexospan for information on custom purlin and girt structural steel dimensions.
