EFCO 8800 Series Assembly Instructions Vol.3 - Manual (Page 10)

EFCO 2009 Page 10
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 7 - B. Outside 90° Corner Unit Frame Assembly
16. Assemble the mitered 17H1 stack heads using (4) SFQ5 fasteners and a 2” long piece of the 17J5 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.
17. Apply a continuous fillet weld at the miter of the stack heads as shown in Figure 19, and remove the mullion weld fixture after the weld has cooled and set.
18. Assemble the mitered 17H0 stack sills using (4) SFQ5 fasteners and a 2” long piece of the 17J5 corner mullion as a welding fixture.
19. Apply a continuous square groove at the miter of the stack sills as shown in Figure 22, and remove the mullion weld fixture after the weld has cooled and set.
Figure 17 Figure 18 Figure 19
Figure 20 Figure 21 Figure 22
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
Apply a continuous
square groove weld
as shown.
2” long piece
of corner
mullion used
as welding
fixture.
Stack Sills
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.