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 E1) insert 4 x joining
bars (part F1) 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. Loosley fasten the 2 grub
screws (part F2) on each joining bar fixing it to the mounting rail.
ii. Slide another mounting rail (part E1) onto the joining bars
and tighten all the grub screws, combining the rails securely.
Repeat this procedure for the other 4 rails.
2
E1
E1
F1
F2
F3
E1
BACK
BACK
FRONT
BACK
BACK
FRONT
GRUB
SCREW
JOINING
BAR
F1
On the back side of each of the combined mounting rails, insert the M8 sliding
nuts (part D2) in 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
rail, the remaining 4 near the end of rail.
D2
E1
D2
E1
D2
F1
D2
E1
3
3 x Combined Rails
E1
