Windows

Definitions

Window Types

Widow Types

Window Types

BCA Requirements Lighting – Habitable Rooms 10% of room floor area. Must be clear lighting i.e. glass area – Not be closer than 900mm to provide unrestricted lighting

BCA Requirements Ventilation – All habitable rooms require ventilation – Bathrooms, Laundries also require ventilation – Any other room that be occupied by a person will require ventilation. – Ventilation must be 5% of floor area – If natural ventilation is not possible, mecanical ventilation can be used – Ventilation may be drawn from an adjoining room so long as it not a toilet or airlock

BCA Requirements Note – Toilet cannot open directly onto a food preparation area without an airlock

Materials Aluminium

Finishes Naturally when Aluminium oxidises a protective coat is formed to prevent further corrosion. This differs to Iron where the coating formed by oxidisation flakes of and exposes new metal to the elements

Finishes Anodising – Is the process where this oxidisation process is accelerated and enhanced to build up the thickness off the oxidised layer – Electrolysis in an acid bath is used and dyes are added to provide colouring

Finishes Powder Coating – Paint is applied dry by use of electrical charges ie paint is a negative charge and the window is positively charged. – The item is then cured by baking to form a hardened skin

Materials Timber – May be rebated solid sections or hollow box sections – Durable timbers must be used

Solid Frames

Float Glass Floating molten glass is laid out on molten tin The molten glass then achieves its desired thickness as it settles under its own weight A uniform thickness is then achieved

Drawn Sheet Glass Molten Glass is drawn thru annealing rollers to achieve its size Some variance will result, giving the appearance of distortion.

Safety Glasses Float and Drawn glass when broken will leave sharp and jaggered edges which are very dangerous The BCA limits where can float or drawn glasss

Doors 3mm & 4mm Float & Drawn glass maximum area 0.1m 2 Maximum width 125mm Float & Drawn glass not allowed in wet areas

Door Side Panels 3mm Float & Drawn glass above 1.2 above floor Below 1.2 above floor no matter thickness max area allowable 0.5m 2

View Glazing Handout

Safety Glass Types Toughened Glass Laminated Glass Wired Glass

Toughened Glass Float Glass is cut to required size Placed in furnace to just above melting point but not flowing (Gel like) It is then rapidly cooled causing stressing on the surface particularly on edges Becomes stronger (4 to 6 times) Hard impact will cause the glass to shatter into sizes of about the size of 5 cent pieces

Laminated Glass Two layers of glass held together by a transparent membrane between the glass When broken the membranes holds the glass sheets together. Membrane will hold together and hard impact will cause holes

Wired Glass