Not sure how to quote your post BridgeSmith but to answer your question the Purlin im describing is labeled as the "under purlin" in this diagram and the "purlin support" is labeled as the "prop" beneath the under purlin in this diagram.
The following diagram also gives a pretty good idea of...
Oh sorry its been about 15 years since I was roofing so my terminology/spelling might be a bit off. Its spelled Purlin and it is a beam which supports the weight of the roof at the center of the rafters.
In the second picture the "pearl line support" text is too far to the right for some reason, it should be over that support that comes down at an angle to the left of the beam.
Hello everyone.
So my main experience is in carpentry but have an avid interest in engineering so i tend to get a funny feeling when i see something that looks a bit strange.
A friend of mine recently had a load bearing wall removed which included a chimney breast. The roof pearl lines split...
