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Tel: 01403 711126 |
Forza - Defining Doors

Forza Certificate & Contractors Installation Statement

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Forza Doorsets are factory prepared to include assembled door frame, specified ironmongery pre-installed and leaf(s) aligned within frame.

Site delivery consists of three elements:

1. Assembled Frame (braced): Specified Keeps for the multi-point locking system machined and installed with intumescent protection. Intumescent strips 2 no. 15 x 4 machine grooved and installed.

2. Leaf: Specified multi-point locking system machined and installed with Intumescent protection. Specified hinges machined and installed with the specified intumescent protection. Number of hinges: 3no (11⁄2 pairs) per leaf on leaves up to 2150mm high. 4no (2 pairs) per leaf on leaves greater than 2150mm high. Specified automatic threshold dropseal machined and installed with specified intumescent protection. When specified: security viewer, kickplate or concealed closer will be factory prepared and installed in leaf. Aperture prepared for letter plate when specified.

3. Site box: Specified lever handle/escutcheon. Specified 3 star Europrofile thumbturn/key cylinder/escutcheon. Specified face fixed (or component for concealed) door closer with specified intumescent protection. Steel screws (as recommended by the hinge manufacturers, no smaller than No. 8 (3.8mm diameter) by 32mm long and having thread for the full length) and intumescent pads for frame fix of hinges (already installed on the leaf(s), specified letter plate set for fixing in prepared leaf aperture.

Supplied specified ironmongery incorporated in this audit numbered doorset is detailed in the data box opposite.

Any on site variation to the supplied specified ironmongery covered by the noted Forza audit number on the data box above to be advised and agreed with the Forza Technical department prior to any alterations.



Supporting Construction

The supporting construction may be timber or steel stud plasterboard partition, metal stud demountable partition or masonry wall, but shall be of a type that has been tested or assessed to provide in excess of 30/60 minutes fire resistance, at the required size, when incorporating Forza FD30/FD60 Q-Mark Doorsets. If fitted into timber/steel stud or metal stud demountable partitions, the method of forming the door assembly aperture must be as tested by the partition supplier/manufacturer.


The threshold under the door leaf must be of non-combustible materials or a minimum 15mm thick hardwood (640Kg/m3).

Timber Frame Installation & Gap Tolerance

The frames must be fixed back to the supporting construction with steel fixings at centres not exceeding 600mm on the vertical edges (maximum 150mm from the top and bottom), and a minimum of one fitted centrally across the width of the frame head. Screws shall be minimum 100mm length (type appropriate for the structural opening substrate) and penetrate the supporting construction by at least 40mm. Suitably thick packers depending on frame to supporting construction gap shall be used at all fixing positions.

The gap between the frame and the supporting construction shall be between 5mm and 10mm (max) (enabling mastic and mineral wool to be positioned as per DRW10). Supplied architraves (45mm x 15mm) to be mechanically fixed set 10mm inside from inner frame edge (hinge side) (DRW10). Alternate options for gap between frame to supporting construction are detailed in DRW12. Guidance for various methods of sealing the frame to structural opening is also given in BS 8214:2016 “Timber based fire door assemblies. Code of Practice which may be referred to where appropriate.

The intumescent mastic to be an approved linear gap joint seal successfully tested for doorset installation in accordance with BS476-20 or BS EN 1366-4 for the required period of fire resistance.

The standard doorset design has the leaf fully flush within the timber frame allowing for an onsite proud alignment tolerance no greater than 1mm.

Transomed overpanels shall be secured into the timber frame using steel screws fixed through the rear of the frame members, passing at least 30mm into the centre line of the overpanel thickness. (Screws must not be fixed through the overpanel into the stops, or vice versa). Screws must be no more than 100mm from each corner of the overpanel and at maximum 250mm centres, with a minimum of 2no. screws per overpanel edge. The gap between overpanel and frame (incorporating frame intumescent) should not exceed 2mm (DRW9).

The gap between the door leaf and the timber frame at verticals and head to be a minimum 2mm and a maximum 4mm. Threshold gap under the bottom edge of door to top of finished floor level (FFL) to be nominally 6mm+/-3 mm for fire performance.

If smoke control is also required, the gap to be 3mm unless automatic drop seal fitted to base of leaf and door stop smoke seals fitted to frame head and legs.

The overall frame depth may be increased either in solid form or with the use of extension linings where the joint/biscuit between the main frame and extension does not intrude into the plane of the door thickness.

Site Box Ironmongery and Installation Instructions

Hinge intumescent pads to be positioned into the frame hinge recess and all screws firmly installed.

Specified face fixed door closer: using the template provided the specified closer to be positioned as per DRW11 and installed and adjusted as per the manufacturer’s instructions. For concealed closers the frame component to be fitted as per the manufacturers instructions and adjusted accordingly.

Specified 3 star euro profile thumb turn/key cylinder and escutcheon set: Install into multilock as per the manufactures installation instructions (unique key passport will be supplied by Forza on project completion).

Specified lever handle and rose set to be installed as per manufacturer’s instructions. Letter plate, cowl and intumescent jacket to be installed into leaf aperture as per manufacturers instructions.