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• Install the interior horizontal gaskets,pressing their ends into the butyl sealant and up against the <br /> vertical gaskets. <br /> Step #2: Install the glass <br /> • Position the glass in the frame. <br /> • Raise the glass off the bottom horizontal, and place a setting block(P-1132) at each quarter point(2 <br /> setting blocks per light). <br /> • Lower the glass onto the setting blocks. <br /> Step #3: Cut and install the exterior gaskets <br /> • Cut the exterior vertical gaskets to D.L.O. + 1"+shrinkage allowance (see page 43). <br /> • Install the exterior vertical gaskets. The vertical gasket should start 1/2" above the surface of the <br /> upper horizontal, and should extend 1/2"below the surface of the lower horizontal. <br /> • Apply butyl sealant to the vertical gaskets where the ends of the horizontal gaskets will contact <br /> them. <br /> • Cut the exterior horizontal gaskets to D.L.O. +shrinkage allowance (see page 43). <br /> • Install the exterior horizontal gaskets, pressing their ends into the butyl sealant and up against the <br /> vertical gaskets. <br /> Step #4: Seal perimeter of installation <br /> • Insert backer rod into the gap between the frame and the building substrate on top, sides, and bottom <br /> of the installation. <br /> • Apply sealant to fill the void. <br /> • Tool the sealant smooth. <br /> TUBELITE 0 <br /> STOREFRONT,CURTAINWALL&ENTRANCES <br /> DEPENDABLE <br /> Tubelite Inc. <br /> 3056 Walker Ridge Drive NW, Suite G <br /> Walker, Michigan 49544 <br /> Phone 800.866.2227 <br /> Fax 877.299.2414 <br /> Page 44 of 44 14000 Series—Revision December 01, 2009 <br />