![]() External doorsets are more at risk, but damage can be controlled by regular decoration. Timber doorsets may warp, shrink, expand or distort due to moisture changes. There is no perfect material solution for doorsets.Įach material offers a compromise between functionality, durability, use in practice and the service environment. Smoke seals and moving parts should be cleaned and ironmongery with moving parts lubricated every six months. Regular inspection of the door should confirm correct functioning and adequacy of condition. The importance of inspecting and maintaining fire doors in use cannot be overestimated. Locks and latches should comply with standards BS 5872 category A for housing and category B for buildings requiring a more robust construction. Specify door closers to at least power grade three in BS EN 1154. It has eight durability grades according to the number of test cycles the hinge can endure. The standard for single axis hinges BS EN 1935 has four categories of use: light, medium, heavy and severe duty. Ironmongery should be specified using the classes in the European standards to match component performance with expected usage. Enhanced security may be achieved using PAS 23 and PAS 24, which test for operating forces, weather exposure categories and loads in use, abusive forces on handles, a cyclical test as well as various impact loads.Įxternal exposure suitability should be confirmed by BS EN 12207 for air permeability, BS EN 12208 for watertightness and BS EN 12210 for wind load resistance. Choose edge seals that have been tested for performance, preferably 100,000 opening and closing cycles.īD DD 171 classifies doors by strength and durability based on four duty categories: light, medium, heavy or severe. Where fire doors are expected to perform a smoke-controlling function, ensure the edge seal system specified is suitable for the door type and expected usage. Specification of a fire-rated doorset avoids the potential pitfalls of site assembly including ensuring the ironmongery, edge gaps and seals are compatible and achieve the required fire resistance under the design ventilation conditions either side of the door. BS 8214 gives guidance for non–metallic fire doors. Ensure the certificate covers the actual model of door specified. And second, assess component options with reference to expected use, failure modes and durability requirements.įire doors should be specified with third-party certification assuring performance for the required period of fire protection to BS 476-22 or BS EN 1634. Where door installation is straightforward or for refurbishment of old properties with non-standard openings, site assembly may be the preferred option.įirst ensure the doorset meets key functional requirements such as fire protection, security, weather tightness and sound insulation. As a fully assembled domestic front door may comprise 30-80 individual items, which need to be measured, cut and fixed, there is scope for errors that in the life of the door are likely to require additional maintenance intervention or result in premature failure. Fitting a similar door in situ and installing equivalent ironmongery, accessories, glazing and decoration may add four to seven hours so the complete installed capital cost of a doorset may be less than an equivalent site-assembled door.įactory-controlled manufacture of doorsets should reduce the risk of defects associated with inaccurate installation. Typical installation time for a fully furnished and finished doorset is two to three hours. Site-assembled doors but reduced installation times. Doorsets incur higher material costs than ![]() Building Boardroom Digital Construction Academyĭoorsets comprise the complete door assembly including the door frame, door leaf or leaves, ironmongery and accessories. ![]() Construction Business: Strategy, Risk and Regulations.
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