Fabricated and installed custom layout cap for roof curb duct work penetrations. Using 16ga galvanized angle steel, a grid was built under cap to provide support for new cap. This support grid was then built up with 22ga 1-1/2” zee to bypass threads and bolts supporting duct work. For the perimeter trim, we used stainless steel and edges were built to the height of the new zee grid, then the layout work began for the 24 ga. galvanized cap. All metal laps and joints were sealed with butyl tape, stainless rivets, and nitrate sealant due to tight spaces. Handy Mechanic help by: Gary Barrow Jr. Downtown – New Orleans, LA