PARTITIONS & EXTERNAL WALLS
INTERNAL PARTITIONS CONVERSION OF EXTERNAL WALL TO INTERNAL WALL TECHNICAL DATA 30 minutes fire rating, integrity and insulation in accordance with the criteria of BS 7: Part 22: 1987. 1. Horizontal sheeting rail at maximum 2.2m centres. 1 7 2a. SUPALUX board, 9mm thick. 3 2b. SUPALUX board 9mm thick, 00mm wide to suit FLAMEBRAKER GRID. 3. SUPALUX cover fillet, 9mm thick x depth of sheeting rail, screw fixed to rail.. FLAMEBRAKER GRID, main tees at 03mm centres, cross tees at all panel joints. Main tees connected to each 10 rail using split hangers of FLAMEBRAKER GRID system.. Perimeter angle of FLAMEBRAKER GRID system.. Mineral wool not required, for 30 minutes. See below for 0 and 120 minutes mineral wool requirements. 7. Galvanised steel top hat sections, approximately 2mm deep x 80mm wide x 0.mm. Width of face that panels are screwed to should be 0mm minimum. Secure top hats to every rail using two steel fixings per rail at 00mm centres. 8 2a 9 8. Perimeter galvanised angle, 38mm x 19mm x 0.8mm or Installation Method 1 similar secured to wall or floor using steel screws or bolts, and plugs at nominal 00mm centres. 9. Self-tapping screws, 19mm x No.8 at nominal 300mm centres. Screw boards to every top hat section. 1 10. SUPALUX cover strips, 100mm wide at horizontal joints. 3 0 minutes fire rating, integrity and insulation in accordance with the criteria of BS 7: Part 22: 1987. All details as for 30 minutes fire resisting except that mineral wool quilt, 100mm x 23 kg/m 3 or 80mm x 30kg/m 3 minimum density (), must be suspended between the sheeting rails. The mineral wool can be secured to the underside of each rail using galvanised angle 0mm x 2mm x 0.mm or similar, fixed through the angle and mineral wool to the rail at maximum 00mm centres. 120 minutes fire rating, integrity and insulation in accordance with the criteria of BS 7: Part 22: 1987. All details as for 0 minutes fire resisting except that mineral wool quilt should be wired mineral wool, 80mm x 100 kg/m 3 minimum density. 2b NOTE: The specifications may vary slightly depending on the sheeting rail size. Any structural steel protruding from the SUPALUX lining should also be fire protected. For further details please contact Promat Technical Services Department. Installation Method 2 93
EXTERNAL WALLS EXTERNAL WALLS Fire Testing Methods Non-loadbearing external walls should normally be tested or assessed in accordance with BS 7: Part 22: 1987 and are required to satisfy the failure criteria of integrity and insulation when exposed to fire from either side. In some instances there will be additional criteria concerning the heat radiation from the unexposed face of the walls. For additional advice, please consult Promat Technical Services Department. Design Considerations In the case of external walls, the proximity of a building to the relevant (facing) boundary determines the probability of it being a danger to other buildings on adjoining sites or of it being at risk from a neighbouring building on fire. Building Regulations specify different fire resistance periods for external walls depending upon their distance from the relevant boundary. Where the walls are required to provide fire resistance only from the inside, loadbearing capacity and integrity are required to be satisfied for the full period; whereas insulation is required for only 1 minutes. This means that satisfactory constructions will be very different from those required to maintain insulation for the full period and where fire resistance is required from either side. The following points should be considered when determining the correct specification to ensure an external wall will provide the required fire performance. Further advice can be obtained from Promat Technical Services Department. 1. Distance from the Relevant Boundary Building Regulations does sometimes relax the requirements for external walls which are one metre or more from the relevant property boundary. In most cases the wall only needs to be tested or assessed for its performance when exposed to fire from within the building. In addition, the maximum insulation period required is only 1 minutes. 2. External Cladding The external cladding can significantly affect the overall fire performance of an external wall. For example, some composite external cladding panels with expanded plastic cores may perform much worse than a single skin steel sheet due to the low melting point of the core. 3. Structural Steel All structural steel within a fire protected external wall should also be protected. This includes walls which may only require to be partially protected. If the steel frame of a single storey building has not been designed in accordance with the document, Fire and steel construction: The behaviour of steel portal frames in boundary conditions, 1990 (2 nd Edition) published by the Steel Construction Institute, the rafters of the roof may also need protection as their collapse could lead to the collapse of the external wall. Generally, any steelwork located on the non-fire side of a SUPALUX wall lining will be adequately fire protected.. Single Storey Buildings The external walls of single storey buildings which may otherwise not require to be fire protected, may still require to be protected if they are too close to the relevant boundary.. Cavity Barriers Building Regulations specify where cavity barriers are required.. Thermal Insulation U-values will depend upon the complete wall design. These U-values can be improved by the addition of more mineral wool. For additional information, please consult Promat Technical Services Department. 7. Impact Resistance SUPALUX is robust and reasonably impact resistant. Where there is risk of heavy impact however, and in most cases below a height of 2m above floor level, it is advisable to introduce additional framing members as stiffening. Protection barriers or masonry walls up to 2m in height are often advisable. 8. Wind Loading The Promat systems offer good resistance to wind induced internal pressures. If there are predominant openings in the external envelope of the building however, the advice of Promat Technical Services Department should be sought. NOTE: Scottish Regulations may require different periods of fire insulation. 9
EXTERNAL WALLS FURTHER THAN 1M FROM THE RELEVANT BOUNDARY TECHNICAL DATA 0, 120 or 20 minutes fire rating, integrity and 1 minutes insulation in accordance with the criteria of BS 7: Part 22: 1987 internal fire only. 1. Horizontal sheeting rail at maximum 2.2m centres. 2. External cladding, either single skin steel or fibre cement sheet. 3a. 120 minutes fire rating: SUPALUX board, mm thick. 20 minutes fire rating: SUPALUX board, 9mm thick. Screw fixed to all top hat sections (8). 3b. 0 minutes fire rating: MASTERBOARD mm x 00mm wide. 120 minutes fire rating: SUPALUX mm x 00mm wide. 20 minutes fire rating: SUPALUX 9mm x 00mm wide. Retained by spring wedges inserted in to prepunched holes in the stems of the FLAMEBRAKER GRID.. Vertical main tees at 03mm centres 1 11 2 8 10 3a 9. Horizontal cross tees at every panel joint. Purlin straps Installation Method 1 Concealed grid. 7 7. Galvanised perimeter trim, 2mm x 2mm x 0.mm 8. Galvanised steel top hat sections, approximately 2mm deep x 80mm wide x 0.mm. Width of face that panels are screwed to should be 0mm minimum. Secure top hats to every rail using two steel fixings per rail at 00mm centres. 9. Drywall screws, 2mm long at nominal 300mm centres Screw boards to every top hat section. 10. SUPALUX cover strips (thickness dependant on fire rating), 100mm wide at horizontal joints. 11. Mineral wool, minimum 0mm x 23kg/m 3, suspended in cavity. Secure to underside of sheeting rails using galvanised angle, 0mm x 2mm x 0.mm, or similar, fixed through the angle and mineral wool to the rail at maximum 00mm centres. 1 2 11 NOTE: Mineral wool (11) is only required for use with mm SUPALUX and if (2) is a steel profile sheet. Mineral wool can be omitted if 9mm SUPALUX is used, or if exterior profile sheet is fibre cement product. 3b These specifications do not cover the use of composite cladding systems with combustible cores. 7 Installation Method 2 Exposed grid. 9
EXTERNAL WALLS WITHIN 1M FROM THE RELEVANT BOUNDARY TECHNICAL DATA 30, 0 or 120 minutes fire rating, integrity and insulation in 2 8 accordance with the criteria of BS 7: Part 22: 1987 fire from either side. 1. Horizontal sheeting rail at maximum 2.2m centres. 2. External cladding, single skin of steel, aluminium or fibre 8 cement. 3. SUPALUX 9mm thick, screw fixed to 38mm x 38mm x 1 0.8mm steel tees cut around and secured to the horizontal sheeting rail. 3 SUPALUX 9mm thick x 00mm wide, retained by spring wedges inserted in to prepunched holes in the stems 7 of the FLAMEBRAKER GRID.. SUPALUX cover fillet, 9mm thick x depth of sheeting rail. 10 9 Cover fillet to be positioned on both sides of sheeting rail.. Vertical main tees at 03mm centres 7. Horizontal cross tees at every panel joint 8. Purlin strap 9. Galvanised perimeter angle, 2mm x 2mm x 0.mm. Installation Method Exposed grid. 10. 30 minutes fire rating: Mineral wool not required. 0 minutes fire rating: Mineral wool, 80mm x 23 kg/m 3, should be suspended in cavity by fixing to the underside of sheeting rails and extending down past lower rails behind internal lining and fixed between the sheeting rails using galvanised angle, 0mm x 2mm x 0.mm or similar, fixed through the angle and mineral wool to the rail at maximum 00mm centres. 120 minutes fire rating: As for 0 minutes but with wired mineral wool quilt, 0mm thick x 110 kg/m 3. 9
ROOF LININGS Fire stop roof profile with mineral wool ROOF LININGS Junction of Compartment Wall with Roof Where a compartment wall meets a roof, the roof may require protection over a distance of 1.m from each face of the wall. If the roof does not have a continuous fire-protective lining, the necessary protection can be provided with a board lining in FLAMEBRAKER GRID; details of the return up to the roof covering are described below and shown in the illustrations. Fire stop roof profile with mineral wool 1.m minimum Compartment wall Purlins parallel to wall (boards and mineral wool omitted for clarity). Purlins Parallel to the Wall The FLAMEBRAKER GRID is cut and turned through 90º and fitted next to the purlin by means of a strap and angle bracket as shown in the drawing. Boards are fixed parallel to the purlins and held in place vertically in the grid by means of spring wedges and supported horizontally on angles (not shown in the drawing) fixed to and spanning between the main tees of the grid. Boards are laid horizontally in the grid in the normal fashion beneath the purlins with the mineral wool insulation being laid on top of the boards, and used to line the vertical boards. Roof profile should be fire stopped with mineral wool. Purlins at Right Angles to the Wall Boards are fixed horizontally below the purlin with the insulation laid on top as shown. Vertical boards are cut to fit within the purlin and fitted flush with the underside of the roof deck and lined with mineral wool. Any gaps in the purlin are fire stopped with mineral wool. Boards are fixed at the base to an angle fixed to the main tee of the grid and also fixed to another angle spanning between, and fixed to, the purlins. 1.m minimum Compartment wall Purlins at right angle to wall 7
ROOF LININGS STEEL SHEET ROOFING Fire resistances quoted are derived from independent assessments based on BS 7: Part 8, and refer to fire exposure from inside. Fire Resistance (minutes) Stability & integrity Insulation Specification Detail 30 30 Lining: mm Masterboard, maximum size 1200mm x 00mm. Infill: mineral wool 80mm thick (23kg/m 3 ). 0 30 Lining: mm Supalux, maximum size 1800mm x 00mm. Infill: mineral wool 80mm thick (23kg/m 3 ). 120 30 Lining: mm Supalux, maximum size 1800mm x 00mm. Infill: mineral wool 7mm thick (33kg/m 3 ). Note: These specifications do not cover the use of composite cladding systems with combustible cores. 7
ROOF LININGS FLAMEBRAKER GRID COMPONENTS All hot dip galvanised steel to BS 2989: 1982, minimum galvanic coat G200. Main tees 3mm x 3mm x 300mm long, punched at 10mm centres for cross tees and spring wedges. Main tees have splice tabs at both ends to form interlocking joints. Cross tees 3mm x 3mm x 03mm effective length, punched to hold spring wedges. Fixing straps 18mm wide x 300mm or 0mm long, split and notched at one end to allow snapping on to main tee stalk. No drilling or screwing is required. Spring wedges 11mm x 17mm x 0mm long, corrugated to prevent slipping. Suitable for both mm and 9mm thick boards. Angle trims 90º, 120º or 13º angles are available in galvanised steel (size 2 x 2 x 300mm long). Insulation retaining clips Used to retain insulation in vertical or steply sloping installations, 1mm wide x 10mm long with 80mm split ends. Clipped on to main tees, ends simply bend out to retain the insulation. Spring wedge Main tee Fixing strap Square punched hole for cross tee, spring wedge or insulation retaining clips Interlocking splice tabs Main tee Cross tee Expansion cut out Insulation retaining clips FLAMEBRAKER Components Detail 7