FD30/FD60 - Frame & Door Installation Guide

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 FD30/FD60 door assembly openings. 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.

Timber Frame Installation & Gap Tolerance

The frames must be fixed back to the supporting construction with steel fixings at centers not exceeding 600mm on the vertical edges (minimum 200mm from the top and bottom), and a minimum of one fitted centrally across the width of the frame head of double doors. Screws shall be of sufficient length to penetrate the supporting construction by at least 40mm, and shall be positioned such that they are not exploited by charring of the frame, irrespective of the direction of fire exposure; (this may necessitate a twin line of screws). 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 when architraves are in use shall be between 5mm and 10mm (max) (enabling mastic and mineral wool to be positioned as per DRW1). Mineral wool to be tightly packed in the gap and capped at the perimeters of the frame with intumescent mastic to a minimum depth of 10mm. Architraves (minimum thickness 15mm) of the same material as the frame to be mechanically fixed providing 15mm overlap on both frame and supporting construction (DRW1). 

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

Shadow gap details may be included in the supporting construction: DRW2 & DRW5 (FD30) opposite or in a frame extension at the interface of the frame and wall (FZD0162/A). For all other gaps between the frame and the supporting construction (with or without architraves) the method of installation should follow the recommendations of Tables 

2 to 5 in BS 8214:2016, “Timber based fire door assemblies - Code of Practice”.

No part of the rear of the frame section shall be exposed once installed, (except for integral architraves and the above shadow gap detail) and leaves must not protrude beyond the exposed face of the doorframe.

The standard door assembly design should be such that single acting leaves are fully flush within the timber frame when closed and double acting doors should be in the centre of the timber frame depth. The face of leaves in double door assemblies should be flush with each other at meeting stiles when closed.

Overpanels shall be secured into the timber frame using steel screws fixed through the rear of the frame members, passing at least 40mm into the centre 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 400mm centres, with a minimum of 2no. Screws per overpanel edge. This specification applies to overpanels used with or without a transom. The gap between overpanel and frame should not exceed 3mm.

The gap between the door and the timber frame, double door meeting stiles and door(s) and overpanel should be between 1.5mm to 4mm. Gaps under the bottom edge of door(s) to top of finished floor level (FFL) should not exceed 6mm for fire performance, although, if smoke control is also required, these gaps should only be 3mm and smoke seals should be included in accordance with BS8214:2016 .12.3. Note: Ambient Temperature Smoke Seals (overleaf). Each vertical leaf edge should not be reduced for site tolerance by more than 2mm with hinge or intumescent recesses re-depthed accordingly. 

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.

Fanlight/sidelight assemblies - FD30 & FD60 - Single Centre glazed available. For offset or double glazed FD30 only - Fire risk side to be agreed with local building control & fire glass to be positioned nearest to unexposed face. 

Onsite resizing of leaf(s) height from the base of the door(s) is permissible subject to maintaining permitted ironmongery and vision panel position dimensions.

Metal Door Frames

When Aluminium and Steel frames to the specification and minimum dimensions detailed below are installed into suitable supporting constructions then the method of forming the door assembly aperture must be as tested by the frame or partition supplier/ manufacturer. The gap for fire performance and smoke control between the door and metal frame, double door meeting stiles and under the door to floor shall be as tested by the frame or partition supplier/manufacturer. There shall be no feature rebates or shadow gaps at the junction of the frame and wall with steel or aluminium frames unless tested by the frame or partition supplier/manufacturer.

DOOR FRAME – JOINT OPTIONS FD30 & FD60 – Drawing No. FZD0774

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Smoke and Intumescent Seals

Ambient Temperature Smoke Seals

FD30 & FD60 where the door assembly has the additional classification requirement of S. 

Separate smoke seals (eg ref ST1009) or combined intumescent smoke seals that have been tested in accordance with BS EN 1634-3:2004 (ambient temperature ) or BS476: part 31: section 31, 1:1983 and demonstrated not to leak by more than 3m3/m/hr (head and jambs only) at 25Pa, may be used in conjunction with Forza door assemblies to provide smoke control. To achieve the required level of smoke control the orientation of the seals and degree of hardware interruption, door edge gaps and leaf configuration must be as tested. The threshold gap should where practicable be sealed by a flexible edge or automatic drop seal with a leakage rate as tested above or where this is not practicable due to the interference with the closing action of the door, the threshold gap should not exceed 3mm at any point.

Intumescent Seal specification

FD30 One no. 20 x 4mm seal fitted centrally at the head and stiles in either the door leaf or the equivalent position in the frame/overpanel and in double door flush meeting stiles. Double door rebated meeting stiles & overpanel, two no. 10 x 4mm with one in each rebate. 

FD60 Two no. 15 x 4mm seals fitted 10mm apart at the head and stiles in either the door leaf or equivalent position in the frame/overpanel & in double door flush meeting stiles. Double door rebated meeting stiles & overpanel, two no. 15 x 4mm with one in each rebate.