Hopper windows (also known as bottom hung open in windows) are hinged at the sill & open to the inside. Maximum height 1400 mm – Maximum width 1000 mm. The degree of opening can be pre set to as much or as little as required. Movement of sash is generally restricted to 30 degrees. They can be integrated with Fixedlight windows and glass door systems.
APPLICATIONS
Hopper windows are popular in commercial buildings such as restaurants, clubs, bars, etc as they allow ventilation where open out windows are not possible due to restricted space or access i.e. security grills on the outside of windows or walkways.
GLAZING
Frames can be designed to provide internal or external glazing installation. Glass type & thickness determined by Australian Standard AS1288. Maximum glass thickness is 10.38mm. Glass can be retained by face putty, screw on or clip on bead methods.
HARDWARE
Hardware options are standard keyed lever handle or spring catch (non-keyed). The use of spring catches also allows high level applications where windows are opened & closed by use of a boat hook.
FINISHES
Steel window frames are hot dip galvanized as standard and do not require painting for corrosion protection. However, their appearance is greatly enhanced by special polyurethane paint colours applied on site by appropriate contractors after installation is completed.
INSTALLATION
Steel windows are suitable for fixing into all standard construction details. The perimeter section can be varied to suite all masonry and concrete wall construction details. More specialised construction including steel sub-frames can also be accommodated. Mechanical fixing via fixing lugs and dynabolts is most common. Where building construction is suitable dynabolt fixing through the perimeter frame is an option.
