Z-Purlin Lap Detail
Z-Purlin Lap Detail
(OP)
It makes sense to ensure lapped purlins have the same width flange, but is that necessarily so? And only the purlin thicknesses can vary along a premanufactured building?
I seem to recall a certain ease for stripping a flange if it were necessary.
Even if the flange widths match, the member thickness itself will cause interference at the lap.
I seem to recall a certain ease for stripping a flange if it were necessary.
Even if the flange widths match, the member thickness itself will cause interference at the lap.





RE: Z-Purlin Lap Detail
RE: Z-Purlin Lap Detail
I drew the picture of the varied flangewidth. This manuf provides the varied width and same width purlins. I see they nest better and may be rotated along the line for that advantage. That's the key to the cleanest lap joint.