313 Curtain Wall - Ali Systems Limited

Assembly & Installation
Fitting of mullions
If not already fitted in the factory, fit 313110 rail brackets
at each rail fixing position on every mullion using 4 No 10
x 1.1/4” pan head self tapping screws, except at till where
one screw is omitted as shown. Before fitting mullions a
313/l 7 mullion plug must be completely sealed into the
front mullion tube using small joint sealant, and then
pushed up so that there is 50mm of clear space below it.
This procedure must be repeated at the extreme top of
the curtain walling.
Drop the first mullion onto the mullion locator on the till.
Secure the top of the mullion into the Tie Back Fixing
Bracket using the lower two Ml0 x 80mm bolts.
The two top Ml0 x 80mm bolts should be withdrawn. The
lower end of the upper mullion should now be placed into
the Tie Back Fixing Bracket and the bolts re-applied. The
head of this mullion should be retained by fitting it into the
next Tie Back Fixing Bracket or by sliding in the head
retaining bracket 313/25 and fixing it securely to the
structure, using Ml0 bolts of an adequate length.
At this point the bolts connecting the Tie Back Fixing
Bracket to the structure should be loosened. Insert a
Smm dia bar through the mullion expansion gap which
will position the Tie Back Fixing Bracket in its correct
vetticat position. Fullytightenthetwo Ml0 bolts attaching
the Tie Back Fixing Bracket to the structure.
Repeat with the next mullion. Before proceeding with the
next mullion, fit bottom rail between two mullions by firstly
removing the backing paper from 2 off 31313 joint
mouldings and fitting to both ends oi the rail. Then lightly
smearthe surfaces of the joint moulding which mate with
the cut out in the mullions with petroleum jelly and
carefully slide the rail on from the front. Lightly tap the
gasket on each shoulder of the rail in turn with a mallet
until the rail is fully home. Fit internal rail capping 17531
or 17533 (see page 6-3). Lower mullions and check that
till bulb seal is in placeand compressed. Clean off excess
sealant from bottom of mullions.
Fix rail to mullions using 2 No 8 x 1” pan head self tapping
screws per bracket by tightening each screw in turn until
the gasket groove shoulders of the rail sit flush with the
mullion shoulders. Using a Stanley knife or similar, cut the
shoulders of the rail joint gasket off flush with the mullion
and rail gasket groove shoulders.
Fit next mullion and the rail in between. Continue with this
procedure until all first floor mullions are fitted. When all
rails have been fitted and tightened. the flanges of the joint
moulding which protrude past the gasket groove of the
mullions and rails must be trimmed back flush.
5-2
No 8 x 1” pan
hd self tap screws