YES 600 Thermal Clip Storefront System SCREW SPLINE ASSEMBLY SNAP IN FILLER SPLINE SCREWS SCREW SPLINE MULLION SETTING BLOCK HEAD WATER DEFLECTOR JOINT PLUG INTERMEDIATE HORIZONTAL THERMAL SILL FACE COVER SILL FLASHING The Screw Spline Assembly method uses a two piece vertical mullion. This allows the frame to be constructed in units and installed using screws driven through the back of the vertical mullions into the screw splines of the horizontal members. Effective Date: April 28, 2020 | 02-1005-04 Page-3