## 9.1.16.2 Metal Windows and Doors 

Metal windows and doors shall be of good quality and robust and shall be to the approval of the Engi- neer. Metal windows and doors shall be handled with care and until fixed shall be stacked on edge on clean surf aces. 

In brick openings, frames shall be fitted with fixing lugs in adequate number, and bedded in mortar. In concrete openings, frames shall be plugged to the walls using zinc-coated screws. 

To avoid corrosion of Aluminium alloy frames, screws and other metal fixing in contact with them shall be of Aluminium, zinc or cadmium plated. In no circumstances shall copper fixings be used. 

Frames shall not be used as centring for brickwork or to support a lintel. Frames shall be carefully pointed in 1: 3 cement mortar and, after raking out the gap, shall be pointed with mastic. 

The main elements of aluminium solid section outer frame shall be not less than 2.0 mm thick. The thickness of all other structural elements of the sections shall be not less than 1.2 mm except for weather-stripping retaining flanges and glazing beads which may be thinner. 

All aluminium alloy parts shall be finished satin matt and anodised conforming to Turkish Standards. 

Weather-stripping shall 

 be made from materials known to be compatible with aluminium 

 not shrink or warp nor adhere to sliding surfaces or closing surfaces 

 not promote corrosion when in contact with the aluminium alloy used 

 be resistant to deterioration by weathering 

Joints in frames shall be made neatly and accurately either by welding or by mechanical means (e.g. cleating and screwing) and may have flush stepped or lapped surfaces. Welded joints shall be cleaned off smooth on the surfaces which are exposed when the window or door is in closed position or where they come into contact with glazing. 

Hinges and pivots shall be either of suitable corrosion resistant materials or, if not compatible with aluminium, shall be separated from the aluminium by material that is compatible with it. Hardware including its fixings shall be of suitable corrosion resistant materials. Materials or finishes which are not compatible with aluminium shall not be used unless they are satisfactorily separate from the alu- minium by materials that are compatible with it. Screws (self-tapping and wood), nuts, bolts, washers and other fastenings shall be of stainless steel or aluminium. 

Glazing beads gaskets glass adapters and glazing compounds shall be materials compatible with alu- minium and finished thereon. 

Windows and doors shall be such that glazing or re-glazing on site is possible without the need to re- move the outer frame from the structure of the building. 

All opening windows and shall be fitted with suitable insect screens. 

The Contractor shall submit details of manufacture including sections of the frame members and no orders shall be placed until such details have been approved by the Engineer. 

