Products / MSC Panels

The Chief MSC (Mechanically Seamed Construction) panel is a field-seamed standing seam steel roof panel with concealed floating clips, an interlocking 3-inch seam and factory-applied hot melt mastic in the high ribs. Chief's guide specification gives 24-inch or 18-inch net coverage in 24- or 22-gauge, 50,000 psi steel, with an acrylic-coated Galvalume finish or a PVDF or FEVE topcoat over an ASTM A792 AZ50 Galvalume substrate; published color SRI values run from 28 to 81. The guide specification calls for roof panel assemblies with a UL 580 Class 90 uplift rating, a UL 790 Class A fire rating and a UL 2218 Class 4 impact rating, testing to ASTM E1592, E1680 and E1646, and an optional Factory Mutual Class 1 rating. The guide specification states a 25-year Galvalume panel warranty against perforation and a 35-year PVDF/FEVE finish warranty.