Northern Steel Doorsets.
A range of quality steel doorsets designed for internal and external use, to cover a wide range of applications including personnel doors, fire resistant doors, escape doors, entrance doors and security doors.
Doorsets are factory prepared to receive ironmongery and are light and easy to handle on site, but are able to withstand heavy use and long exposure to the elements.
Fire resistant doorsets are tested to BS 476: Part 22 (1987) by the Loss prevention Council and are available as single or double leaf arrangements with up to 4 hours fire resistance.
Acoustic, insulated and special doorsets are available: for further information, contact Northern Doors Technical Department.

Dimensions (Standard Single Doorsets):
2100 x 900mm overall frame (structural opening size: 2105 x 910mm).
2100 x 1000mm overall frame (structural opening size: 2105 x 1010mm).
Dimensions of standard pair doorsets:
2100 x 1800mm overall frame (structural opening size: 2105 x 1810mm).
2100 x 1922mm overall frame (structural opening size: 2105 x 1932mm).
Standard frame size: 147 x 57mm overall.
Non-standard size doorsets and frame profiles are available, manufactured to individual project requirements.

Standard Doorset Designs:
Flush.
Vision panels - square, oblong or circular or virtually any size.
Louvres - full height or at bottom. One hour fire resisting louvres are available.
Glazed or flush transoms.
Leaf and a half doorsets.

Leaf
Constructed from 2 skins of 1.2mm thick zinc coated steel, joined by a strong, concealed mechanical seam to provide panel strength and rigidity. For extra strength, the void between the skins is infilled with a bonded honeycomb core material offering excellent compression/torsional load performance. Strategic reinforcement areas are incorporated to enable a wide range of ironmongery to be fitted.

Frames
Pressed from 1.6mm thick zinc coated steel to form a double or single rebate profile. Headers are fully profiled for a smooth butt-joint with the vertical frame posts and are reinforced to suit door closers. Optional extras include aluminium threshold and tubular silicone rubber seal bonded into frame rebate. Frame seals, combined with an aluminium threshold ensures accurate sealing between door leaf and frame.

Finishes
All doors and frames receive one coat of self-etching primer as standard, prior to dispatch. Alternatively, doors and frames can be supplied factory finished in any standard BS 4800 of RAL colour.

Hardware
A wide range of ironmongery is available as standard. Alternatively, doorsets may be prepared to suit the Clients own ironmongery requirements. It is recommended, however, that Northern Doors own ironmongery is used for fire resisting doorsets to ensure the fire resisting performance is maintained.
Consult with Northern Doors (UK) Ltds technical literature for details. Northern Doors can also provide a design and specification advisory service and it is recommended that they be consulted early in the design process.