ROGER BULLIVANT LIMITED SYSTEMFIRST HOUSE FOUNDATION SYSTEM

Transcription

1 Roger Bullivant Limited Walton Road Drakelow Burton-on-Trent Staffordshire DE15 9UA Tel: Fax: website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 06/4294 Product Sheet 1 ROGER BULLIVANT LIMITED SYSTEMFIRST HOUSE FOUNDATION SYSTEM PRODUCT SCOPE AND SUMMARY OF CERTIFICATE This Certificate relates to the Roger Bullivant Limited SystemFirst House Foundation System, comprising an in-situ assembly of galvanized steel edge and internal support beams, galvanized steel channel section beams, insulation, in-situ concrete infill and fibrereinforced screed. AGRÉMENT CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Structural performance the system components have adequate strength to resist the loads associated with installation and permanent loading (see section 5). Thermal insulation the system contributes to the overall thermal performance of the construction (see section 6). Condensation risk junctions with other elements will adequately limit the risk of surface condensation (see section 10). Durability the will have an effective minimum design life of 60 years (see section 12). The BBA has awarded this Agrément Certificate to the company named above for the product described herein. This product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 3 October 2008 Brian Chamberlain Greg Cooper Originally certificated on 13 February 2006 Head of Approvals Engineering Chief Executive The BBA is a UKAS accredited certification body Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2008 website: Page 1 of 12

2 Regulations In the opinion of the BBA, the Roger Bullivant Limited SystemFirst House Foundation System, if used in accordance with the provisions of this Certificate, will meet or contribute to meeting the relevant requirements of the following Building Regulations: The Building Regulations 2000 (as amended) (England and Wales) Requirement: A1(1) Loading The system will have adequate strength and stiffness. See sections 5.1 to 5.4 of this Certificate. Requirement: C2(c) Resistance to moisture The system can meet this Requirement. See sections 10.1 and 10.2 of this Certificate. Requirement: L1(a)(i) Dwellings The system can adequately limit heat loss. See sections 6.2 to 6.4 of this Certificate. Requirement: Regulation 7 Materials and workmanship The system construction is acceptable. See section 12 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1)(2) Fitness and durability of materials and workmanship The system can contribute to a construction meeting this Regulation. See sections 11 and 12 and the Installation part of this Certificate. Regulation: 9 Building standards construction Standard: 1.1(2) Structure The system will have sufficient strength and stiffness, with reference to clause (1), when designed and constructed in accordance with sections 5.1 to 5.4 of this Certificate. Standard: 3.15 Condensation The system can satisfy this Standard, with reference to clauses (1), (1), (1) and (1). See sections 10.1 and 10.2 of this Certificate. Standard: 6.2 Building insulation envelope The system will enable a wall or roof to satisfy this Standard, with reference to clauses (1) (Table 1), (1) and (1). See sections 6.2 to 6.4 of this Certificate. (1) Technical Handbook (Domestic). The Building Regulations (Northern Ireland) 2000 (as amended) Regulation: B2 Fitness of materials and workmanship The system is acceptable. See section 12 and the Installation part of this Certificate. Regulation: B3(2) Suitability of certain materials This system does not require maintenance. See section 11 of this Certificate. Regulation: C5 Condensation Floors will have a minimal risk of interstitial and surface condensation. See sections 10.1 and 10.2 of this Certificate. Regulation: D1 Stability The system will have adequate strength and stiffness. See sections 5.1 to 5.4 of this Certificate. Regulation: F2(a)(i) Conservation measures The system can satisfy the requirements of this Regulation. See sections 6.2 to 6.4 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 Information in this Certificate may assist the client, CDM co-ordinator, designer and contractors to address their obligations under these Regulations. See sections: 2 Delivery and site handling (2.3) and 13 General (13.1). Non-regulatory Information NHBC Standards 2008 NHBC accepts the use of the Roger Bullivant Limited SystemFirst House Foundation System when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapters 4.5 Raft, pile, pier and beam foundations and 5.2 Suspended ground and standards for conversion and renovation. Page 2 of 12

3 Zurich Building Guarantee Technical Manual 2007 In the opinion of the BBA, the Roger Bullivant Limited SystemFirst House Foundation System, when installed and used in accordance with this Certificate, satisfies the requirements of the Zurich Building Guarantee Technical Manual, Section 3 Substructure, Sub-section s. General The Roger Bullivant Limited SystemFirst (1) House Foundation System is used for constructing ground beams and insulated, suspended ground s in dwellings and other similar buildings. It is for use in traditional low-rise buildings of masonry, timber or light-gauge steel framed construction, for construction up to two storeys plus room-in-the-roof as defined by BS : 1995, in conjunction with piled and pier foundations produced by the Certificate holder. (1) SystemFirst is a registered trademark of Roger Bullivant Limited. Technical Specification 1 Description 1.1 The Roger Bullivant Limited SystemFirst House Foundation System comprises galvanized profile steel foundation support beams () infilled with concrete, supporting site-fabricated pairs of galvanized steel joists (TwinBeam), incorporating an insulation deck and a fibre-reinforced screed for ground s of dwellings and similar buildings. 1.2 The components of the system are: (see Figure 1) foundation support beam profile for use as a permanent shutter and support during construction. The rolled profile steel strip is made from 2 mm thick S350 grade (to BS EN : 2004 and BS EN ISO : 1999) pre-galvanized to European designation FEE 350G-450g NAC to BS EN : Dimensions are 306 mm wide by 75 mm deep. The foundation beam (see Figure 6) is cut to predetermined lengths, prior to delivery to site. Once installed, each beam is filled on site with concrete and two high-yield steel reinforcing bars (see Figure 3) channel section (see Figure 2) used in pairs with insulation to make-up a Twin Beam joist. The sections are spaced at 560 mm centres (maximum) with channel sections (diaphragms) at each end and intermediate positions along the span. The channels are fastened top and bottom with Tek screws or by clinch fixing. The sections are from 1.2 mm thick, 142 mm deep by 40 mm wide, cold formed, rolled steel strip S350 grade (to BS EN : 2004 and BS EN ISO : 1999) pre-galvanized to European designation FEE 350G-450g NAC to BS EN : 2004 Figure 1 Figure 2 Channel section used to make up TwinBeam joist dimensions in mm 46 5 dimensions in mm shutter bracket assembly (see Figure 4) for use in supporting 20 mm thick re-usable plywood formwork to edge beam concrete. The assembly is made from 1 mm thick cold formed, rolled steel strip S350 grade (BS EN : 2004 and BS EN ISO : 1999) pre-galvanized to European designation FEE 350 G450g NAC to BS EN : The shutter bracket top is re-usable but the shutter bracket base is cast in place Page 3 of 12

4 Figure 3 Construction details cavity wall insulation to extend 150 mm below top of insualtion dpc cavity wall insulation to extend 150 mm below top of insualtion dpc backfill barrier ventilation channel masonry 75 mm full fill cavity masonry 100 mm partial fill cavity masonry 100 mm cavity separating wall masonry sleeper centre beam masonry internal wall timber frame external wall dpc cement board battlement beam timber frame cavity separating wall masonry garage Page 4 of 12

5 Figure 4 Shutter bracket assembly plywood formwork shutter bracket base (100 mm cavity) (SFH/A4/CD05) shutter support slide on to base to lock into position reinforcement support shutter bracket top (SFH/A4/CD06) exploded view assembled view re-usable shuttering plywood 300 mm deep by 2400 mm long by 20 mm thick slotted into shuttering brackets. cranked vent proprietary cavity vent by Manthorpe or similar (see Figure in section 9) ventilation channel cold-formed channel 40 mm wide by 30 mm high from 1.2 mm thick galvanized (275G) steel insulation single layer of 110 mm thick, high-density expanded polystyrene (EPS 150) ( 90/90 value = Wm 1 K 1 ) to BS EN : 2001 used as an insulation deck on the TwinBeam joists concrete grade C35 (maximum 10 mm aggregate) supplied by Quality Scheme for Ready Mixed Concrete (QSRMC) registered plants or be site-batched to Certificate holder s specified design mix. The Certificate holder arranges for cube testing of site-batched concrete to BS EN : 2000 by UKAS Approved independent testing laboratories screed (40 mm thick) as for concrete with additional polypropylene multi-filament fibre reinforcement cement particle board where the TwinBeam joists are used for garage construction, the insulation and screed is replaced with a 20 mm thick layer of cement particleboard decking (Type T2) to BS EN : 1997 and a 120 mm thick, grade C35 fibre-reinforced concrete to the Certificate holder s specification. 1.3 Other ancillary components include: intermediate support blocks and wedges to provide temporary support to foundation beams prior to and during concrete casting shot-fired and screw fixings. 1.4 Other items for use with the system but outside the scope of this Certificate include: gas membrane when required, subject to effective detailing around service openings and NHBC and national Building Regulation requirements backfill barrier. Quality control 1.5 System components are bought-in to agreed specifications or in accordance with British Standards or Agrément Certificates. 1.6 Quality checks are made during the manufacturing process and on the components. 2 Delivery and site handling 2.1 All components of the system are delivered to site for assembly by the Certificate holder s operatives. Page 5 of 12

6 2.2 Unless required for immediate use, all components should be stored in a clean, dry environment on firm ground. Care should be taken to a mechanical damage, particularly to edges/corners. Damaged components should not be used. 2.3 Beam elements can be lifted by hand depending on the size of the bundle or mechanically lifted using appropriate slings, chains or shackles. 2.4 If beams are to be stored, a suitable firm surface should be selected. Beam bundles should be supported on timber chocks at third points. Overstacking should be aed to ensure stability of the stack. 2.5 The expanded polystyrene insulation is supplied either in shrink-wrapped packs or containers. Contact with solvents or bitumen products should be aed. 2.6 Concrete is normally delivered to site by lorry, for immediate use. Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the Roger Bullivant Limited SystemFirst House Foundation System. Design Considerations 3 General 3.1 The Roger Bullivant Limited SystemFirst House Foundation System is only suitable for use as suspended ground s in dwellings and other similar buildings. 3.2 All structural design and detailing involving the use of the system must be carried out in accordance with relevant UK Codes of Practice and statutory national Building Regulations. For each project the Certificate holder s Design Department will examine the loading configuration applied by each structure on the system elements and check this against the limitations of the system. 3.3 Any external, internal and separating loadbearing walls together with the threshold of garages must be supported by the foundation support (see Figure 3). 3.4 Holes up to 150 mm in diameter may be formed anywhere in the between the TwinBeam joists. The holes can be formed with sleeves or core-drilled after casting of the. Rectangular holes between the joists, up to 150 mm long (in the direction of span), may be formed at the supported ends only. 3.5 Chases must not be made into the concrete infill of the foundation support beam elements as this will affect the overall strength of foundation support beams. Chasing into the concrete screed, either across or parallel to the span of panels is only allowable subject to agreement with the Certificate holder. 3.6 Floors constructed from the system have adequate resistance to hard-body impacts likely to occur during construction. 3.7 Where radon or landfill gas is present, additional care is required to ensure provision of taped and sealed membrane joints and effective sealing of all service points passing through the. The gas membrane is not covered by this Certificate. 3.8 The ground over which the s are to be installed must be suitably prepared and cleared of vegetation and any contaminants. Floors must include provision for draining the solum and appropriate under- ventilation. Concrete blinding or gravel over a damp-proof membrane (dpm) should be used over the prepared ground surface, where required. 4 Practicability of installation Installation of the Roger Bullivant Limited SystemFirst House Foundation System must be carried out by personnel trained by the Certificate holder in accordance with the Installation Manual. 5 Structural performance 5.1 The loadbearing capacity of the system has been evaluated by use of finite element analysis (FEA) adopting maximum bending moment and shear forces originally obtained for a hybrid house developed for the Roger Bullivant Limited T4 Kit Tee Beam Foundation System and confirmed by load testing. 5.2 From the test data, it is confirmed by calculation that the s and TwinBeam joists have adequate capacity to resist the construction phase and permanent domestic loading. 5.3 The maximum span of the is 3.5 m measured from the centre of the piles. The beams must have a minimum bearing length of 75 mm. 5.4 The maximum span of the TwinBeam joists is 3.5 m measured from the centre line of the s. The TwinBeam joists must have a minimum bearing length of 60 mm. 5.5 Lightweight non-loadbearing partitions equivalent to 0.5 knm 2 can be built directly off the screed. All other situations require the use of other support elements or additional foundations where point loads are present. Page 6 of 12

7 5.6 Service holes up to 150 mm can be cut through the expanded polystyrene decking on site prior to screeding and sleeves introduced. For larger service openings, specific detailing is required, including additional structural elements. s are not to be cut, trimmed or curtailed short of bearings to accommodate service or other openings. 6 Thermal insulation 6.1 Example calculations to BS EN ISO : 1998 for the SystemFirst Floor System indicate the U values shown in Table 1 (see Table 1, note 1). Table 1 Floor U values (1) Perimeter/area ratio U value (Wm 2 K 1 ) (1) The calculated U values are based on the following parameters: structural fibre-reinforced screed 40 mm above the insulation conductivity 2.3 Wm 1 K 1 soil (taken as typical clay) (2) conductivity 1.5 Wm 1 K 1 under wall (278 mm thick) U value 0.40 Wm 2 K 1 slab U value 0.29 Wm 2 K 1 design wind speed (3) 5 ms 1 under ventilation m 2 m 1 wind shielding factor (3) 0.05 height above ground 150 mm. (2) Where the soil type is known and is not clay (or silt), the U value of the should be calculated using the thermal conductivity value given in BS EN ISO : 1998, Table 1. (3) Standard values from BRE report (BR 443 : 2006) Conventions for U-values calculations. 6.2 The system can contribute to achieving the following design values: England and Wales and Northern Ireland 0.25 Wm 2 K 1 for a notional building in SAP 0.25 Wm 2 K 1 limit average in Approved Document L1A (Table 2), and Technical Booklet F1 (Table2.2) 0.70 Wm 2 K 1 limit for an individual element in approved Document L1A (Table 2) and Technical Booklet F1 (Table2.2). Scotland 0.20 Wm 2 K 1 for a notional building in SAP and required for the simplified approach (packages 3 and 6) in Mandatory Standard 6.1, clause (1) 0.22 Wm 2 K 1 for a notional building in SAP and required for the simplified approach (packages 1, 2, 4 and 5) in Mandatory Standard 6.1, clause (1) 0.25 Wm 2 K 1 limit average in Mandatory Standard 6.2, clause (1) 0.22 Wm 2 K 1 for extensions the value described by Mandatory Standard 6.2, clause (1) 0.70 Wm 2 K 1 limit for an individual element specified in Mandatory Standard 6.2, clause (1). (1) Technical Handbook (Domestic). 6.3 Floors with U values lower than (or the same as in Scotland) the relevant notional value above will contribute to a dwelling meeting its target of an overall reduction in carbon dioxide emissions of about 20% (or 18% to 25% in Scotland). Floors with higher U values will require additional energy saving measures in the building envelope and/or services. 6.4 Junctions shown in this Certificate, adequately limit heat loss by conduction and, when installed to limit air infiltration, comply with the requirements of the Accredited Construction Details (version 1.0), and the Accredited Construction Details (Scotland). The relevant default psi values given in SAP 2005, Table K1, may be used. 7 Moisture penetration Sub- ventilators and services penetrating the should be of an appropriate design to inhibit the ingress of moisture. Page 7 of 12

8 8 Properties in relation to fire Cavity barriers are not required where the under is not accessible or is less than 1 m high. 9 Ventilation 9.1 The under is ventilated by pathways and openings providing not less than 1500 mm 2 of ventilation per metre run of external wall (see Figure 5). Figure 5 Ventilation to under 9.2 Apertures in the are 50 mm by 20 mm at 500 mm centres and provide 2000 mm 2 of ventilation per metre run. 9.3 A continuous galvanized steel ventilation channel, 40 mm wide by 30 mm high, is located over the ground beam apertures (see Figure 5). The channel is pre-punched with 35 mm square holes at 50 mm centres which can be knocked through at crank ventilation positions to provide 3675 mm 2 of ventilation. The crank vents (see Figure 5) are generally provided at 2.45 metre maximum centres. 9.4 In areas prone to landfill gas or methane contamination, the effective open area of the ventilation paths should be at least the recommended minimum, from the BRE Report 212 (BR 212 : 1991) Construction of new buildings on gascontaminated land, of 1500 mm 2 per metre run of wall or 500 mm 2 per square metre of area, whichever is the greater. In areas where full radon precautions are required, the minimum effective open area of 1500 mm 2 per metre run given in BRE Report 211 (BR 211 : 2007) Radon : guidance on protective measures for new dwellings should be used and provision should be made for the possible later addition of mechanical ventilation. 10 Condensation risk 10.1 To minimise the risk of surface condensation on the steel elements within the beneath the, ventilation should be provided (see section 9) Numerical modelling of example /wall junctions indicate that the risk of internal surface condensation will be minimal in normal circumstances. 11 Maintenance As this product is confined beneath the and has suitable durability, maintenance is not required. 12 Durability The exposure condition beneath a suspended ground over a ventilated without oversite concrete or other surface seal is considered moderate as defined in BS : The expanded polystyrene components are not in direct contact with substances liable to cause deterioration and in this context the will have an effective minimum design life of 60 years. Installation 13 General 13.1 Installation of the Roger Bullivant Limited SystemFirst House Foundation System must be carried out in accordance with the Certificate holder s Installation Manual. Typical construction details are shown in Figure It is essential that any mortar droppings are removed from the cavity between separating wall leaves to a sound transference. Page 8 of 12

9 13.3 The type of backfill barrier used (see Figure 3) should be of sufficient strength to restrain any surcharge load in additional to soil For applications not requiring a gas membrane, a single layer of high-density expanded polystyrene decking is placed, in staggered formation, across the area. Where a gas membrane is required (not covered by this Certificate), the membrane is laid over the insulation, across the concrete infill and lapped over the foundation support beams to join up with the wall dpm; an EPS edge strip is placed on top of the membrane. 14 Site preparation 14.1 The ground surface should be led and cleared of vegetation and contaminants A minimum clearance of 150 mm between the ground surface and the underside of the should be provided in accordance with BS : 1995, Section 5.3. Greater clearances are required for heave-susceptible soils in accordance with NHBC Standards A support or pile foundation (1) and pile cap (1) are constructed by the Certificate holder. (1) Outside the scope of the Certificate Drainage and service ducting are installed in accordance with building design. 15 Installation 15.1 Using agreed datum points and grid references, the s (see Figures 6 and 7) are set out on top of the support caps which may deviate by a maximum vertical tolerance of +0 to 10 mm and horizontal tolerance of ±50 mm. The beams are also supported centrally with temporary intermediate supports for construction loads prior and during concrete casting as required. Figure 6 Typical plan of joists and support beams C B BAY A BAY B A BAY C BAY D dimensions in mm Page 9 of 12

10 Figure 7 on support cap 15.2 Final checks for, tolerances, including diagonal check and position, are made, and the beam ends are securely fixed on to the support caps using shot-fired nails or screws The location of drainage runs and service entries are checked and marked on the inside face of the Battlement beam The TwinBeam joists are lifted into position on the s. The joists are checked for correct centres, bearing length on edge and internal s, and correct depth between the soffit of beams and the led ground surface [the steel channel diaphragms also provide partial shuttering for the infill concrete to the s (see Figure 3)] Once the s and TwinBeam joists are positioned and the setting out dimensions checked, the lower sections of the shutter holding brackets are placed onto the s at 500 mm centres using either: a fixative sealant to the Certificate holder s approval, or in preformed holes: push fit grommet, Tek screw or drill and rivet Any debris is cleared out and the reinforcing rods are rested on the bracket reinforcement supports (see Figure 4) and tied together at overlaps as required. The re-usable section of the shutter holding bracket is attached to the lower section The plywood shutters are slotted into the inside face of the bracket (see Figure 4). Corner shuttering may be screw-fixed or nailed to maintain stability during concrete infilling as required The EPS insulation decking is laid onto the top of the TwinBeam joists in accordance with the, specified layout and layout/section drawings Using either hand or pump delivery, concrete is poured into the outer Battlement and between the plywood shuttering to the top of the EPS decking and diaphrams and consolidated using a vibrating poker (maximum 25 mm diameter). The concrete is trowelled smooth to remove excess concrete and allowed to harden for at least one day before placing the screed The screed is poured onto the EPS insulation and to form a surface, using a brush or float, to a tolerance of +5 mm and 0 mm in readiness to receive finishes. Typical construction details are shown in Figure 3. Generally, a 40 mm minimum screed thickness is provided but, where a gas membrane is specified, the screed thickness is increased to a minimum of 55 mm. Technical Investigations 16 Tests 16.1 Hard body impact tests were carried out on the fibre-reinforced concrete screed based on BS EN 1128 : Load testing was carried out to a BBA test specification, on a full-scale panel to determine the strength of system Creep tests were carried out on 500 mm square samples to determine creep characteristics under a sustained load of 1 kn over a 28-day period. Page 10 of 12

11 17 Investigations 17.1 Finite element analysis, carried out on stainless steel foundation support edge and intermediate beams, was reviewed along with structural calculations and load/span tables in accordance with BS : Floor U values, perimeter heat loss and risk of condensation analysis was undertaken in accordance with BS EN ISO : 1998 and BRE Information Paper IP 1/06 Assessing the effects of thermal bridging at junctions and around openings An examination was made of existing data relating to the durability of the system components. 18 Other investigations 18.1 The manufacturing process was examined and details were obtained of the quality and composition of materials A visit was made to a site to assess the practicability of installation The component specifications and methods for maintaining the required product quality and composition were examined. Bibliography BS : 1998 Structural use of steelwork in building Code of practice for design of cold formed thin gauge sections BS : 1995 Structural design of low-rise buildings Code of practice for stability, site investigation, foundations and ground slabs for housing BS : 1995 Structural design of low-rise buildings Code of practice for suspended concrete s for housing BS : 1997 Structural use of concrete Code of practice for design and construction BS EN : 1997 Cement bonded particleboards Specification Requirements for OPC bonded particleboards for use in dry, humid and exterior conditions BS EN 1128 : 1996 Cement-bonded particleboards Determination of hard body impact resistance BS EN : 2004 Continuously hot-dip coated strip and sheet of structural steels Technical delivery conditions BS EN : 2004 Continuously hot-dip coated strip and sheet of low carbon steels for cold forming Technical delivery conditions BS EN : 2000 Testing hardened concrete Shape, dimensions and other requirements for specimens and moulds BS EN : 2001 Thermal insulation products for buildings Factory made products of expanded polystyrene (EPS) Specification BS EN ISO : 1998 Thermal performance of buildings Heat transfer via the ground Calculation methods BS EN ISO : 1999 Protection against corrosion of iron and steel in structures Zinc and aluminium coatings Guidelines BS EN : 2004 Continuously hot-dip coated strip and sheet of low carbon steels for cold forming Technical delivery conditions Page 11 of 12

12 Conditions of Certification 19 Conditions 19.1 This Certificate: relates only to the product/system that is named and described on the front page is granted only to the company, firm or person named on the front page no other company, firm or person may hold or claim any entitlement to this Certificate is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English law References in this Certificate to any Act of Parliament, Statutory Instrument, Directive or Regulation of the European Union, British, European or International Standard, Code of Practice, manufacturers instructions or similar publication, are references to such publication in the form in which it was current at the date of this Certificate This Certificate will remain valid for an unlimited period provided that the product/system and the manufacture and/or fabrication including all related and relevant processes thereof: are maintained at or above the s which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate In granting this Certificate, the BBA is not responsible for: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system individual installations of the product/system, including the nature, design, methods and workmanship of or related to the installation the actual works in which the product/system is installed, used and maintained, including the nature, design, methods and workmanship of such works Any information relating to the manufacture, supply, installation, use and maintenance of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used and maintained. It does not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common law or other duty which may exist at the date of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. In granting this Certificate, the BBA does not accept responsibility to any person or body for any loss or damage, including personal injury, arising as a direct or indirect result of the manufacture, supply, installation, use and maintenance of this product/system. British Board of Agrément tel: Bucknalls Lane fax: Garston, Watford mail@bba.star.co.uk Herts WD25 9BA 2008 website: Page 12 of 12