Summary:
E- Class ( 30min ) fire doors and door frames
Great North Timbers engineered fire door guidelines - E- Class ( 30min ) fire doors and door frames
Door Frame - This 30 minute fire rated door must be installed in either of the following approved frames : 55x90mm Esstee meranti fire door frame with 4 x100mm x1.2mm thick removable steel hinges equally spaced 1st hinge not more than 150mm from top inside edge of frame
813x2032 x1.2mm thick steel stable door frame with 4 x100x1.2mm thick removable steel hinges equally spaced 1st hinge not more than 150mm from top inside edge of frame
Mortice lock - not exceeding 150mm in depth and 20mm thick
Quality acceptance – All doors should be inspected immediately upon receipt, prior to installing, to ensure that size and quality of each is acceptable.
Storage and conditioning (acclimatisation) – Prior to installing the door should be stored in a ventilated, dry area and protected from moisture (from damp floor beneath the area on which doors are stored) and rain. Doors should be stored flat on three equally spaced bearers. It is advisable to allow the door to acclimatise/condition itself to ambient relative humidity in the locality where it will be fitted. Care should be taken to ensure central heating is not on high when the door is fitted as this will cause the door to shrink unevenly – heating should be increased gradually to allow the moisture evaporation in the timber structure of the door to equalise evenly. The door must not be subjected to extremes of dryness or humidity and/or sudden changes in ambient moisture levels.
Fitting – clearances between door leaf & frame
Top leaf : not to exceed 3mm
Total width of clearances between the vertical side of the leave and frame does not exceed 6mm
Floor clearance : not to exceed 12mm.
The door must not be fitted in new/recently plastered and bricked areas as these will substantially increase moisture in the area and increase risk of deterioration of the door. Such areas should be completely dry before installing the door. The width of the door can be reduced, if necessary, by trimming equally on both sides to a maximum of 10mm overall (5mm per side). Height reduction should preferably be restricted to a maximum of 10mm overall (5mm top & bottom).
As timber is a naturally grown product there will be a tendency for movement with changes in temperature and humidity. Warp, bow, twist or cupping shall not be accepted as defect unless it exceeds accepted norms of 6,35mm in the plane of the door.
Finishing – The door should be treated prior to fitting with a suitable sealing coat and a minimum of two coats of quality exterior hardwood timber finishing product or paint, allowing each coat to dry thoroughly before applying the next coat. All six sides and cut-outs for locks, hinges, etc. must be well treated before fitting the door and regularly thereafter. Yacht-quality varnish should not be used. Water- or solvent-based treatments are not recommended. It is recommended that dark colours be avoided for sides of doors that face direct sun.
Condition of sale – The manufacturer/supplier of the door will not be liable for any incidental charges or expenses as a result of bad handling, storage, fitting, installation or treatment. In the unlikely event that the door proves unacceptable due to manufacturer’s defect, liability shall not, in any case, exceed the cost of the door.