Fire Door Technical Information
Available in a selection of variants, Nico fire door hinges meet a broad range of performance requirements, including Certifire approval.
Where on-site removal of the door is necessary, there are a choice of 5 hinge patterns each offering individual installation and performance characteristics. For more secure applications, the 4815 and 4817 fixed pin hinges with dual bearings are available – with radius corners for machine preparation or square corners for on-site installation.
Incorporating low-friction bearings to assist in the ease of door operation, Loadpro is the recommended choice for high efficiency specifications where conformity with the door opening resistance criteria of DDA (Disability Discrimination Act) is paramount.
Nico’s range of steel and stainless steel hinges can also be used for fire resistance applications with adjusted door weights of 60 to 120kg. While requiring periodic lubrication to maintain maximum efficiency, the hinges offer a low cost solution to minimum fire door requirements, making them ideal for domestic, social housing and light commercial projects.
To assist in the correct hinge selection for a particular application, the tables and diagrams show recommended hinge positioning for optimum performance, as well as indicating the variables which should be applied to actual door dimensions when selecting hinges for extra high or wide doors, or when used in conjunction with standard or back-check door closers.
- Determine weight of the door including hardware
- Make adjustment for width of door (see Table 1)
- Make adjustment for type of door closer (see Table 2)
- Calculate adjusted weight; select hinge (see Table 3)
All fire tests on Nico hinges were carried out using ‘Interdens’ intumescent pads, which are made from mono ammonium phosphate in a glass fibre carrier.
To comply with the fire test certification all Nico fire hinges should be fitted with the same amount and type of intumescent material that was used during fire testing. As detailed below.
Using a different type or thickness of intumescent material than that used during testing could invalidate the test evidence for that hinge and therefore potentially the whole doorset.