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Windows. Definitions. Definitions. Definitions. Definitions. Window Types. Window Types. Widow Types. Window Types. Window Types. BCA Requirements. Lighting – Habitable Rooms 10% of room floor area. Must be clear lighting i.e. glass area - PowerPoint PPT Presentation
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Windows
Definitions
Definitions
Definitions
Definitions
Window Types
Window Types
Widow Types
Window 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 protectivecoat is formed to prevent further corrosion.
This differs to Iron where the coating formed byoxidisation flakes of and exposes new metal tothe 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 0.1m2
• 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 0.5m2
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