When made of wood it is usually covered with some sort of weatherproofing and sometimes an insulation material.
Roof purlins images.
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146032598 roof made of rafter type roof truss close up view from the inside.
2 356 purlin stock photos vectors and illustrations are available royalty free.
The strip of iron attached to the purlin.
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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.
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The roof deck is the wood panel ply board or metal sheeting that creates the surface of the roof.
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Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses.
The longitudinal horizontal beam that is sitting on a post or the principal rafter of a truss and used to support common rafters.
Jan 12 2016 explore bw industries s board roof purlins on pinterest.
Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart.
Purlin plates under purlin principal purlins and common purlins.
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The purlins of a roof support the weight of the roof deck.
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See more ideas about roof porch roof screened porch designs.