1:2Beaver Architectural Ironmongery LtdTechnical NotesClockwise closingAnticlockwise closing HandingThe handing of sprung or asymmetrical lever furniture must be specified to suit the door, as shown in the diagram opposite. Recommended installationOptimum fitting height for lever handles is 900mm from the floor. Doors with a vision panel require at least 200mm clearance so the lever does not foul the glazing bead.When a secondary deadlock is used, the cylinder should be at least 170mm from the bottom fixing to allow clearance for the lever handle.Pull handles of 300mm or greater length should be fitted with the top fixing at least 1300mm from the floor, and the bottom fixing between 700 - 1000mm from the floor. As with levers, a deadlock should be at least 170mm from the bottom fixing to allow clearance.Where child access is a factor, a 600mm pull handle should be used with the bottom fixing 700mm from the floor. In this case, if a deadlock is used it should be moved down to 530mm from the floor, and for greater security an additional lock may fitted above the pull handle.800 - 1050200700 - 1000min 1300170700530Lever handlePull handle(Recommended for pull face of door only)Pull handle, 600mm - child accessAccessibility and the Disability Discrimination ActIn order to comply with BS 8300 and Approved Document M of the Building Regulations, the following is required:l Lever action door furniture is preferable to knob furniture, where practical. It should be possible to open the door with a single hand action without excessive grasping or twisting of the wrist.l Design and positioning of all handles should be consistent throughout a project.l The pull point should be 800 - 1050mm from the floor (900mm recommended).l Lever handles should meet the following minimum dimensions: 19mm diameter, 95mm grip length, 54mm backset from the door edge and 45mm clearance between the grip and the door.l Pull handles should meet the following minimum dimensions: 19mm diameter (maximum 35mm), 300mm grip length and 45mm clearance between the grip and the door.l Door furniture should have a strong visual contrast to the door finish to enable easy identification by visually impaired people. A Light Reflectance Value of 15 or more is recommended.l Where possible external door furniture should not feel cold to the touch.l Outward opening doors without self-closing devices should be fitted with a horizontal pull handle on the inside.l 400mm kicking plates may be fitted to protect doors from wheelchairs, but this is no longer a compulsory requirement.l Bathroom locks should have turns large enough for easy operation by the less able.ExtIntHanding of bathroom furniture: right hand shown.
Beaver Architectural Ironmongery Ltd1:3Technical NotesPull handle fixingThe different methods of fixing pull handles are illustrated in the diagrams below:Bolt through with screw cap coverBolt through with screw cap cover and roseBack to back fixing on timberBack to back fixing on glassFace fixed covered rosesSecret face fixingBolt through fixMaintenance adviceLever furniture: backplates or rose fixings should be periodically checked for tightness and adjusted if found to be loose. Spindle grub screw fixing should also be checked and tightened. Badly fitting and maintained furniture can prevent the lock from operating correctly and affect the performance of the door.Pull handles: these should be checked to ensure that the bolt through fixings or screw fixings are tight, as loose pull handles can result in damage to the door face.Care of finishesThe build up of dirt and dust on door furniture can cause a breakdown of the high quality finish. This is more likely to occur in coastal or industrial areas, and to prevent it the furniture should be cleaned as per the following instructions.Polished silver anodised aluminiumAnodised aluminium should be dusted regularly with a soft cloth and periodically washed with warm soapy water.Stainless steelGrade 316 stainless steel offers a greater resistance to corrosion. Both polished and satin finishes should be washed periodically with warm soapy water and dusted regularly.Lacquered brassWash periodically with warm soapy water and clean regularly using a wax polish. Never use abrasive or metal polish. The lacquer may eventually break down, in which case it should be removed and the furniture treated as unlacquered.Unlacquered brassThis finish should be polished weekly with a proprietary metal cleaner to maintain its polished appearance, or alternatively left to gain a natural patina.Simulated stainless steel or brassThese plated finishes should be washed with warm soapy water using a soft cloth.Silver enamelledThis finish should be cleaned with a soft cloth.Plated finishesThese will benefit from the occasional use of chrome cleaner, followed by a wipe from a cloth impregnated with a light oil.RBMA and rustic bronzeThese will benefit from the occasional wipe from a cloth impregnated with a light oil.Unlacquered bronzeThis finish should be polished regularly with a good quality metal polish, or alternatively left to allow the surface to age naturally through oxidisation.