EFCO 945 Series - Manual (Page 21)

945 Quick Set
SUBSILL
2G22
SUBSILL
2G22
BAB 11/2001
PAGE 19
SECTION V - SUBSILL FABRICATION
(CON’T)
INCLUDES CAPTURED AND STRUCTURAL GLAZED MULLION SYSTEMS
STEP 11) SUBSILL SPLICING
Verify that the subsill has been installed according to the instructions on Pages 9
through 14. Splice areas are to be centered at a vertical mullion only. Maximum
subsill length between splices is 20’. If a splice is required, leave a 1/4" gap between
the subsill ends at the splice area. Install and anchor the next run of subsill. Use a
silicone type sealant and a strip of, WM01, bond breaker tape 2" wide and
approximately 7 3/4" long to create the splice material. Apply silicone to both sides
of the subsill ends and fill the void between the subsills as shown in Figure 17.
Ensure that the bond breaker tape is centered over the 1/4" gap, and set the bond
breaker tape into the sealant. Tool the silicone over the bond breaker tape to create
a water tight seal. If more sealant is required to cover the bond breaker tape, apply
the required amount. Ensure that the splice joint does not interfere with the anchor
legs of the sill and subsill. This is done by making sure that the splice joint is located
at the center of the vertical mullions. Refer to the shop drawings or architectural
drawings for mullion center lines.
AFTER INSTALLING THE BOND BREAKER TAPE,
TOOL THE SEALANT OVER THE EDGE OF THE TAPE
TO PRODUCE A WATER TIGHT SEAL.
FILL VOID BETWEEN
SUBSILLS WITH A SILICONE
TYPE SEALANT FROM THE
INTERIOR LEG TO THE BACK
OF THE EXTERIOR LEG.
APPLY SILICONE TYPE
SEALANT TO CREATE A
THIN BED TO SET THE
BOND BREAKER TAPE
INTO.
AFTER THE SPLICE IS INSTALLED, APPLY
A COSMETIC SEAL TO THE INTERIOR
GAP, VERTICALLY.
[FIG. 17]