313 Curtain Wall - Ali Systems Limited

Dealer Information
Technical Bulletin No 216
Modification to 313 mullion profiles
December 1994
To improve the quality of the finish on the side walls of the curtain wall mullions, the central
web is being removed to prevent die blend lines. (see typical mullion 17508 shown below)
This means that an adaptor block will be required at the head and cill to take up the difference
between the head and cill brackets and the back of the various mullions. The adaptor block
is fixed to the structure through the cill using an Ml0 bolt as shown except in the case of the
adaptorfor mullion 17502 where a no.12 selftapping screw is used to secure the block directly
to the cill. At the head there are now various retaining brackets from the range of mullions.
The 313/17 mullion plug can still be used with the 17500 mullion, but for all other mullions a
new plug (313/37) is being introduced which is partially cut for easy breaking off for each
mullion depth.
The range of mullions are listed below together with the appropriate cill adaptor block and
head retaining brackets. Also shown below is a typical head and cill detail showing the use
of the adaptor block.
Mullion Adaptor Block Head Bracket
17500 None 313/25
17502 17503 313/41 313/40 %:z
17504 313/42 313/48
17508 373/43 313/49
PLEASE ENSURE THIS INFORMATION IS CIRCULATED TO ALL DEPARTMENTS
FOR ACTION AS APPROPRIATE
Glostal Limited, Ashchurch Tewkesbury, Glos. G L 8NB. Telephone: 0684 297073 Fax: 0684 293904