Door and Specialised Hardware UNION hinges are suitable for heavy duty applications and for use on doors which are subject to a high frequency of use by the public with little incentive to exercise care. Available in left or right hand. PowerLOAD Hinges Tested to BS EN 1935:2002 and CE marked, UNION hinges have been assessed for use on timber fire doors to BS EN 1634-1, and are ideal for the specification market where durability, reliability and outstanding performance are paramount. Indicator Bolts, Fire Bolts & Covered Turns. Hooks & Multiracks. Door & Wall Stops.