Just round out from photos that the roof Zee purlins in a 30 Y.O. building were installed with the top flanges pointing down hill. Remembering from 50 years ago Structures class that loads should pass through the shear center to prevent torsion buckling. With Zee section on 2:12 pitched roof, it...
Architect is using W16x40 to put a horizontal band around the roof edge of a 1 story building. The length will be about 150 feet!
Initially he showed a 1/4 x 1/4" groove machined on the underside of the bottom flange. I didn't think that was very economical and suggested a piece of bar stock...
I am involved with re-rooofing of an historic barn built in 1948. The roof is in the form of a gothic arch, framed with nail laminated arches made up of 4 -1x8's nailed together with staggered joints - the roof face sawn to a radius. It was reinforced in the 90's by installing glulam arches and...
