1.2 Stick Frame System Curtain Wall

All assembly components and the system in its entirety shall be designed to withstand a wind pressure of 33M/sec. or specified. Air infiltration, structural movement and stresses, and it's performance, shall confirm to BSS.

This system shall be based on "Rain Screen Principle" by providing weep holes on the face and underside of pressure plates, caps, and cill transoms, ensuring that the air pressure within glazing space equal to or approaching that of the external atmosphere. Outer gasket is located in stripped form as an integral part of the pressure plates providing primary weather seal. The external glazing gasket shall act as the weather seal, and the inner as the air seal. The inner gasket shall be constructed as a complete frame incorporating fully moulded corners to withstand air infiltration at high pressure.

The thermal insulation shall be achieved by using thermal breaks between pressure plates and main sections. It shall also work as a means of draining water downwards and as a cavity ventilation.

The glass shall lay on setting blocks mounted on sloping glazing platforms and drips shall be provided on transom nosing directing water into the gutter of pressure plate. End of transom shall be sealed with the mullion thereby separating each pain and forming discontinued air chambers for efficient drainage and pressure equalization.

Mullions shall be provided with primary structural support by means of insert tie backs precast to the structure, spanning in between floors in either tension or compression, and with joint sleeves at floor levels adjacent to the backs maintaining continuity of the mullion. Transoms shall be mechanically fixed by means of spigots and wet seals using appropriate sealants. All bolts, fasteners and fixings, shall be of stainless steel.

In-fills shall float with the framing matrix being located on extruded setting block at sill transoms. In-fills are mechanically retained by continuous pressure plates incorporating extruded gaskets which interlocks as a frame. Fixings shall be in stainless steel and a cover shall be snapped over pressure plate to express the required profile.

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