10
Combine 2 Mounting Rails together using the BT8390-EXT
Insert Sliding Nuts
i. On the intended front facing side of the mounting rail (part D1) insert 4 x joining
bars (part E1) half-way into each slot, on the back side insert 1 x joining bar into
the top slot and 1 x joining bar into the third slot. Loosely fasten the 2 grub screws
(part E2) on each joining bar fixing it to the mounting rail.
ii. Slide another mounting rail (part D1) onto the joining
bars and tighten all the grub screws, combining the rails
securely. Repeat procedure for the other 4 rails.
2
D1
BACK
BACK
FRONT
GRUB
SCREW
JOINING
BAR
On the back side of each of the combined mounting rails, insert the M8
sliding nuts (part C2) into either end, 3 in the bottom slot and 3 in the second
from top slot. 1 x M8 sliding nut in each slot should be positioned near the
centre of the rails, the remaining 4 near the end of rail.
C2
D1
C2
D1
E1
C2
D1
3
3 x Combined Rails
D1
D1
D1
E1
E2
E3
BACK
BACK
FRONT
E1
