EFCO 8800 Series Assembly Instructions Vol.3 - Manual (Page 19)

EFCO 2009 Page 19
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
18. Assemble the mitered 17H1 stack heads using (4) SFQ5 fasteners and a 2” long piece of the 17J4 corner mullion as a welding fixture. Ensure the assembly
is completely square. Take measures to make certain the surrounding exposed finished surfaces are protected from weld spatter.
19. Apply a continuous fillet weld at the miter of the stack heads as shown in Figure 50, and remove the mullion weld fixture after the weld has cooled and set.
20. Assemble the mitered 17H0 stack sills using (4) SFQ5 fasteners and a 2” long piece of the 17J4 corner mullion as a welding fixture.
21. Apply a continuous fillet weld at the miter of the stack sills as shown in Figure 53, and remove the mullion weld fixture after the weld has cooled and set.
Figure 48 Figure 49 Figure 50
Figure 51 Figure 52 Figure 53
Stack Heads
2” long piece
of corner
mullion used
as welding
fixture.
SFQ5 Frame
Screws
Stack Heads
assembled
for welding.
Corner Mullion
Corner Mullion
Welding Fixture
Stack Sills
2” long piece
of corner
mullion used
as welding
fixture.
SFQ5 Frame
Screws
Stack Sills
assembled
for welding.
Corner Mullion
Corner Mullion
Welding Fixture
Stack Heads
Stack Sills
Apply a continuous
square groove weld
as shown.
Apply a continuous
square groove weld
as shown.