guide to specification - Reid Construction Systems

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8 S1: Compliance with the New Zealand Building Code (NZBC) If designed, used, installed and maintained in accordance with statements and conditions contained in this document, the Flexus Modular Flooring System will meet the following provisions of the New Zealand Building Code. Clause B1 – Structure : Performance B1.3.1, and B1.3.2. The Flexus Modular Flooring System meets requirements for loads arising from self-weight and impact (i.e. B1.3.3 (a), (b) and (j). Clause B2 Durability : Performance B2.3.1 (a) not less than 50 years. Clause C3 Spread of Fire: Performance C3.3.1. Clause F2 Hazardous Building Materials: Performance F2.3.1. Clause G6 Airbourne and Impact Sound : Performance G6.3.1 and G6.3.2. S2: Acoustics For inter-tenancy applications the Flexus Modular Flooring System achieves an STC of 57 and IIC of 81. A full acoustic report compiled by an independent acoustic consultant is available at www.flexus.co.nz. In summary, performance requirements of the NZ Building Code are: Clause G6 Airbourne and Impact Sound : Performance G6.3.1 The Sound Transmission Class of walls, floors and ceilings, shall be no less than 55. (STC 55) G6.3.2 The Impact Insulation Class of floors shall be no less than 55. (IIC 55) TABLE 1. Construction Test (Airborne/Impact) 30mm ECC floor; m x 260mm timber trusses; Pink Batts; 13mm Gib Noiseline with rubber isolation clips STC Performance Airbourne STC55 Table 1 : Flexus Composite Modular Flooring System Laboratory Test Results - STC The results of the Flexus Floor System Acoustic Airborne testing demonstrates that; “30mm ECC floor, 90mm x 260mm timber trusses, Pink Batts, 1 Layer of 13mm Gib Noiseline with rubber isolation clips” complies with G6.3.1.” N.B. 20mm particle Board requires 2 layers 13mm Noiseline. TABLE 2. Floor Covering Test (Airborne/Impact) IIC Performance Loop Pile carpet with underlay Airbourne IIC 81 Table 2 : Flexus Modular Flooring System Laboratory Test Results - IIC The results of the Flexus Flooring System Acoustic Impact testing demonstrates that; “30mm ECC floor plus Floor covering of Loop Pile carpet and underlay complies with G6.3.2.”
S3: Fire Rating The Flexus Modular Flooring System comprises of two main elements, a support structure and a floor topping. The support structure is either a timber or steel joist or timber truss layout as per a normal built up floor. The plywood or particle board sheet flooring of a built up floor is replaced by a monolithic cementatious floor sheet (Flexus material) that spans the length of the joists and up to 2400mm in width. The whole of the Flexus floor sheet (span x width) is made as a module complete with the supporting truss or joist system in a factory environment and delivered to site ready for installation. Once the Flexus flooring modules are in place and secured, services can be run through the floor space and a ceiling installed to the underside of the modules. For fire rating we follow the recommendations of the Winstone Wallboards Ltd publication Gib® Fire Rated Systems for fire rated floor/ceiling systems and any specific recommendations from the joist/truss supplier/ manufacturer. Gib® fire rated systems use a 20mm particle board floor or a 17mm plywood floor as a minimum. The Flexus floor sheet is a non combustible cementitious material 30mm thick. By common engineering knowledge of materials, Flexus has a superior fire resistance than the wood based thinner materials used for the Gib® fire rating. Therefore, Reid are comfortable using in accordance for the situation, the fire ratings for Gib® board ceilings as per the Gib® Fire Rated Systems publication for Flexus flooring modules until specific fire tests are completed. Flexus Modular Flooring System can be used to provide passive fire protection in accordance with the requirements of NZBC Clause C3 – Spread of Fire. In order to satisfy the requirements of NZBC Clause C4 – Structural Stability during Fire, designers must ensure that fire rated elements are supported by elements having at least the same Fire Resistance Rating (FRR). Collapse of elements having a lesser FRR shall not cause the consequential collapse of elements required to have a higher FRR. Underneath a Flexus Floor with open webs 9
Page 1: www.flexus.co.nz guide to specifica
Page 4: 4 Introduction The Flexus Modular
Page 7: Pryda Longreach As the name suggest
Page 11 and 12: S4.2 Span Tables Residential Applic
Page 13 and 14: S4.6 Accessories - Installation 4.6
Page 15 and 16: S7: Pryda Truss Design Consideratio
Page 17 and 18: S8(a): End Support Details - Fixing
Page 19 and 20: S10: Flexus Modular Flooring - Desi

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