Delivery and Storage of Door sets
Delivery of door sets should be at the latest possible moment in a build schedule.
Door sets are affected by dramatic changes in humidity and temperature, as this causes timber to swell or contract, thereby changing the crucial gaps that have been allowed during manufacture and possibly jeopardising the stability of the product. For this reason, it is also vital that door sets are not stored in damp or exposed areas for any length of time, and that they are not installed before wet trades have completed their works and sufficient time has been allowed for drying.
Storage:
Store in a dry, ventilated area.
Do not store in any area that is damp or exposed to weather, near standing water.
Do not store in direct sunlight as it can cause discolouration to timber products.
Store on the supplied pallet/bearers, or on at least 4 equal-size flat bearers on a flat surface.
Protect door sets from dirt and damage from other trades if necessary, but do not restrict the airflow.
Ensure that any door sets with projecting hardware or threshold have adequate spacers to separate them in the stack.
Internal doors should be conditioned slowly to the temperature and humidity of the building once operational, this applies before and after installation.
Do not store doors in areas where wet trades are still working and ensure the building has sufficiently dried out before taking delivery.
Storage on site should be kept to a minimum.
Preparing the Installation Area and the Structural Opening
Ensure that the work area is clean and debris-free and that it is accessible. Check that the structural aperture is square and plumb, with adequate tolerance to accommodate the frame. The fitting tolerance must be between 4mm and 20mm to allow for the sealing material. Additional sealing specifications can be found in the BS8214:2016 section 9.0 onwards.
For sealing tolerances between 20mm and 50mm please contact the MDC Fire Doors Technical team who will be able to provide a specific detail which will outline the sealing methods, the document supplied can be used to satisfy 3rd party installation requirements.
Check the labelling to check that you're installing the correct door in the correct opening and that the performance is appropriate for the application.
Check the frame's total height, width, and depth to ensure that the products you receive are correct for the job. Keep any manufacturer's instructions handy during the installation.
The supporting structure in which the door set is mounted must have fire resistance equivalent to or greater than that of the door set. The fire resistance of the supporting structure must have been determined separately in a previous test.
The door set may be hung in a rigid supporting construction (blockwork/brickwork/masonry) or a flexible standard supporting construction (timber/steel stud) meeting the following requirements.
- The door set has been tested in low density rigid standard supporting construction as specified in EN 1362-1 and therefore can be mounted in the same manner with various walls as long as the density and thickness of the wall are equal to or greater than those in which the door set was tested.
- The door set has been tested in one of the flexible standard supporting constructions specified in EN 1363-1 and can be mounted in the same manner in a wall or partition which is of the board-covered type with studs made from metal or timber.
Preparing the Frame
Prior to positioning the frame in the opening, you should prepare the fixing points.
All fixing points must be pilot-drilled and counter-bored to prevent the timber from splitting. Remove any loose timber fibres from the edges of the hole with fine grade finishing paper.If the fixings are to be hidden by an intumescent strip, the counter-drilled cavity simply needs to be the depth of a screw head.
If the fixings are not concealed, create a deeper counter-bored hole to accommodate a timber cap over the screw head.
On the frame jambs, the top and bottom fixing must be located at 100 - 180mm from the top and bottom corners of the door frame. The intermediate fixings must be located at approximately 600mm centres or less.
A fixing to the centre of the frame head is recommended for door leaves over 900mm in width.
There should be a minimum of It is permitted to increase the size and number of fixings.
Preparing the Frame
Ensure that the frame is central in the width of the opening, with equal tolerances on both sides. Ensure that the frame is plumb level and square and that the tolerances are between 4mm and 19mm.
It is possible to vary the position of the door frame within the supporting construction providing that the door frame does not project beyond the supporting construction more than tested.
Depending on the door type fit approved packers into the tolerance gap, between the back of the frame and the wall. Make sure that you use packers of the correct thickness that fill the tolerance gap, but don’t distort the frame. This will also prevent the frame from being distorted when the fixings are applied. Packers should be located at the fixing points already pilot drilled in the frame. Refer to the approved fire-stopping method for details of packer material required.
Drill pilot holes through the existing frame holes and packers into the wall construction, of a suitable size and depth for the fixing type for rigid supporting wall constructions(blockwork/brickwork/masonry), fit wall plugs to each fixing point in the wall, or consider using other expanding fixings.
Fixing the Frame to the Opening
Fixings should penetrate them by a minimum depth of approximately 40mm, so consider the thickness of the frame, the depth of the counter-bored cavity and the tolerance gap when selecting a fixing.
The door frame should be fixed to the opening using 80 x 5mm steel screw fixings.
Start at the top of the hinge jamb, and then move on to the top of the lock jamb, moving down each jamb in turn.
Insert screws slowly and do not over tighten as this may cause distortion in the frame.
Ensure that the screw heads are tightly against the frame and are below the flush level of the frame within the counter bored cavity.
Once all the fixings are applied, check that the frame is still square and plumb, and is free of distortion. Check that the rebate size of the frame is correct to accommodate the door leaf, with acceptable operating gaps being 2.5mm - 4mm between the leaf and frame all around.
Fitting Seals to the Frame
Stredor CE Marked fire-rated door sets will be supplied with intumescent seals, that swell in extreme heat to fill and close operating gaps in the event of a fire. These seals are located in the frame, around the sides and top of the door leaf. Stredor CE Marked smoke-rated door sets will be supplied with a rubber fin-type seal to close the operating gap when the door is shut in the frame. Intumescent seals will be fitted into a groove that has been prepared the size of the seal. Loose smoke seals will be fitted against the door stop.
A Stredor CE Marked door set will usually be supplied with seals installed, however the seals may be supplied loose or temporarily removed for the purpose of installation fixing and finishing.
In this case, the thickness of any finish should be considered when machining intumescent grooves, as the intumescent seal should finish flush with the face of the frame. Some seals may be painted over, check the manufacturer’s instructions.
It is important to ensure that the seals extend the full height and width of the perimeter, to enable suitable sealing at the top joints of the frame. Make sure that the seals are fitted tightly into the corners.
Ensure that the seals are undamaged as this may affect the performance of the door set.
Ensure that the seal grooves are machined cleanly and are free of any deviation, defect, or contaminant.
Cut the seal to size before the removal of the adhesive cover. Peel off the adhesive cover and ensure the adhesive does not contact fingers or any other contaminants. Place the seal directly into the groove or onto the area required, applying firm, overall pressure to achieve a good bond to the contact area. Do not remove the seal once fitted.
If the surface has been primed, lacquered, or painted, it must be completely dry before the seal is fitted.
If surface materials and/or the self-adhesive tape are too cold the adhesive will harden, severely affecting the bonding process. Store and apply the seals in temperatures above 10°C, and ideally between 20°C - 30°C. The seal will withstand extremes of cold and heat when properly applied.
Frame Hardware
If the door set has a lock or flush bolt, it will typically
need metal keeps fitting to the frame. Stredor CE Marked door sets will be supplied with all recessing for keeps completed and with keeps or other frame hardware fitted.
Ensure that the recessing is machined cleanly and is free of any deviation, defect or contaminant.
Ensure that the correct and compatible fixing screws have been used.
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