Modular Glazing 70 Range

Classification
A system of narrow sight line mullions based on the 'stick principle' with integral drainage channels primarily designed for atria glazing installations.
Provision is made within the system for the collection and control of condensation as far as is possible. Condensation is collected in horizontal transom members and drained into purpose designed channels within the glazing bars for dispersal to the outside of the building at the base of the glazing.
Single glass and 24mm double glazed units can be fitted, although not in conjunction with the same mullion/transom.
Various types of opening ventilators, louvres etc. can be incorporated into the system to provide smoke control or natural ventilation.

Construction
The glazing mullions shall comprise of extruded aluminium box or cruciform profile sections. Projecting legs shall have integral extruded gasket retaining grooves and channel to receive clamp fixing screws. Concealed drainage channels and condensation collection channels are included.
Extruded aluminium transoms incorporate projecting legs to seat glazing tape and shall interlock into the mullions and drain into the mullion drain channels. Transoms are seated on a polymeric mastic tape and are screwed into the mullions.
Glass shall be retained in mullions and transoms by means of extruded external clamping members secured by means of stainless steel self tapping screws.
The external mullion clamps are covered by a cosmetic clip-on cover which projects from the glazing face by 22mm.
The horizontal transom joints are achieved using an extruded aluminium flat clamp screwed and sealed to transom members. This external member is designed to be as close to the glass face as possible yet maintain the horizontal seals to allow watershed to be unhindered.
Ridge, hip, verge and eaves conditions are closed off using purpose designed pressed metal profiles, and filler pieces.
Joints in mullions where necessary are sleeved with a welded joint sleeve spigot and allowance has been made for thermal movement within the joint. Purpose designed angle cleats connect mullions structurally and form tie back brackets to structure.

Materials & Finish
Aluminium sections shall be extruded in accordance with BS: 1474 from 6063 alloy in the TF condition. Associated pressed metal trims shall be from aluminium sheets in accordance with BS: l470.
A) Designation 1200 for mill and paint finish
B) Designation 5005 for anodised
All screws or bolts used externally shall be stainless steel designation 304 SL7 in accordance with BS: 3111 part 2.
Screws or bolts used internally shall be mild steel or high tensile steel, zinc plated and passivated in accordance with BS: 3382 & BS: 6338.
Glazing gaskets and thermal barriers shall be of extruded black EPDM in accordance with BS: 4255.
Pre-formed glazing tape shall be a highly adhesive and elastic butyl based hybrid tape, incorporating a continuous integral spacer shim of EPDM specifically designed for compression glazing in sloping applications.
Glass shall be manufactured in accordance with BS: 952 and fixed in accordance with BS: 5516.
Steel fixing cleats shall be mild steel, shotblasted and de-greased and either galvanised to BS 729, zinc phosphated and stove painted, or zinc sprayed and sealed for site painting.
Aluminium fixing cleats shall be extruded aluminium alloy ref 6082 in the TF condition. They shall be mill finish as standard offer but paint or anodised finishes will be considered.
Exposed surfaces of aluminium may be finished in stove paint or anodised aluminium.
Stove paint finish shall be powder polyester to a minimum thickness of 40 microns and shall be in accordance with BS: 6496 and the recommendations of Syntha Pulvin Ltd.
Anodising shall be natural black or bronze to the Anolok range and specification and shall be in accordance with BS: l615 and BS: 3987.