6
J-bolt mounting is done very similar to lag screw
mounting except instead of drilling into the center
of a rafter, a hole must be drilled directly beside a
rafter. The size of the hole must be slightly larger
than the bolt diameter. This is more easily
accomplished if the attic man would drill a pilot
hole through the roof along side the chosen rafter.
Fit the bolt through the mounting brackets and insert
the bolt (J side first) through the hole in the roof.
Work the J underneath the rafter. Pull the J-bolt
snug against the rafter before tightening the nut.
Use double nuts or lock-washers to securely fasten
the mounting bracket to the J-bolt (Figure 8).
Figure 8. J-Bolt Mounting
5.
MOUNTING HARDWARE SPACING
AE-Series
Center Line to Center Line (in.)
Model
Size (ft)
Outside Box Dim. (in.)
AE-MH
AE-FM
AE-RM
AE-21
3 x 7
35.1875 x 85.1875
88.4375
88.9375
86.9375
AE-24
3 x 8
35.1875 x 97.1875
100.4375
100.9375
98.9375
AE-26
4 x 6.5
47.1875 x 77.1875
80.4375
80.9375
78.9375
AE-28
4 x 7
47.1875 x 85.1875
88.4375
88.9375
86.9375
AE-32
4 x 8
47.1875 x 97.1875
100.4375
100.9375
98.9375
AE-40
4 x 10
47.1875 x 121.1875
124.4375
124.9375
122.9375
MSC-Series
Center Line to Center Line (in.)
Model
Size (ft)
Outside Box Dim. (in.)
MSC-MH
MSC-FRM
MSC-FM
MSC-21
3 x 7
35.8750 x 86.1250
90.5
87.375
37.125
MSC-24
3 x 8
35.8750 x 98.1250
102.5
99.375
37.125
