YES 45 TU/FT Thermal Storefront System YES 45 TU FRONT SET OUTSIDE GLAZED SHEAR BLOCKâASSEMBLY SHEAR BLOCK MOUNTING SCREWS HEAD TUBULAR MULLION GLASS STOP INTERMEDIATE HORIZONTAL END DAM SHEAR BLOCK MOUNTING FASTENERS SHEAR BLOCK SNAP-IN FILLER END DAM FASTENERS THERMAL SILL FLASHING Page-14 SILL 02-1003-12 | Effective Date: July 9, 2020