Graphical Construction Glossary >> Roofs and roofing. >> Roof Framing >> fascia purlin
The main advantage of using fascia purlins is that apart from being used to fix the bottom edge of the roof sheeting and giving a vertical face to the last purlin, which is fairly obvious, the same member is also used to fix the top edge of wall sheeting, thus saving the cost of using a separate wall girt.
This layout is common in industrial and smaller shed type buildings.
Offset against this cost saving is the fact that there is very little or no eaves overhang if they are used as a girt also.
Different manufacturers do slightly different features, like having grooves on the vertical face or having greater depth to the wall sheeting, but they all generally follow a similar pattern.
The top flange that the roof sheets are fixed to seems to be generally wider than the flanges on standard purlins.
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