Description

Allied SuperSlab Concrete Floors System is a building method for reinforced concrete slab-on-ground floors. The method uses polystyrene void formers or QPOD moulded plastic pod void formers.

Allied SuperSlab Concrete Floors System has been designed to support timber framed or light steel framed residential houses up to 2 storeys.

Scope

1. Allied SuperSlab Concrete Floors System has been certified for use in buildings within the following scope limitations:

• a. buildings, up to two storeys high, either:
  • i. timber framed within the scope of NZS 3604:2011 (paragraph 1.1.2), or
  • ii. steel framed within the scope of NASH Standard Part Two: 2019 Light Steel Framed Buildings, and 
• b. with a maximum height of 10 m measured from the ground to the apex, and
• c. with Building Types and Minimum ground bearing capacity limits as detailed in Table 1 of Allied Concrete SuperSlab Technical Manual Rev J, February 2024, as follows:
  • i.for building type E supported on “good ground” as defined by the Acceptable Solutions and Verification Methods for New Zealand Building Code Clause B1 Structure1, First edition, amendment 21 (2 November 2023) or
  • ii. for building types B, C & D supported on ground with a reduced ultimate bearing capacity of minimum 200kPa with all other requirements of ‘Good ground’ or,
  • iii. for building type A supported on ground with a reduced ultimate bearing capacity of minimum 150kPa with all other requirements of ‘Good ground’.

Note: The liquefaction characteristic of “Good Ground” may be satisfied by TC1 classification as defined in “Repairing and rebuilding houses affected by the Canterbury earthquakes”, Ministry of Business, Innovation and Employment, Version 3, December 2012.

• d. with a floor maximum length of 30 m unless detailed with free joints in accordance with Allied Concrete SuperSlab Technical Manual Rev J, February 2024; and
• e. with weights and loads as set out in section 3.4 of Allied Concrete SuperSlab Technical Manual Rev J, February 2024, and
• f. situated in Wind Zones up to and including Extra High, and
• g. In seismic areas, Seismic Hazard Factor Z is equal to or less than 0.45 (Zone 3)

2. Allied Superslab Concrete Floors System shall be specified, designed, installed and maintained in accordance with the following Technical Documentation:

• a. BRANZ Appraisal No. 964 [2023] A1 issued 17 April 2024 - Allied SuperSlab Concrete Floors
• b. Allied Concrete SuperSlab Technical Manual Rev J, February 2024

3. Reinforcing Steel, Polystyrene Pods or QPOD, Bar Chairs, Pod Spacers and Damp Proof Membrane must be selected, used, handled and stored in compliance with the requirement of the Technical Documentation.

4. The installation must be either done or supervised by an LPB who holds either a carpentry or a foundation license and have access to the Technical Documentation.

5. A minimum of 20 MPa Allied CSS or RSS mixes must be used except in Exposure Zone D where the minimum requirement is 25 MPa concrete. The specified concrete mixes must be manufactured in accordance with NZS 3104:2010 and in Allied Concrete plants.

6. Compliance with H1.3.1(a) and H1.3.2E for buildings incorporating the Allied SuperSlab Concrete Floors System shall be established by specific design using:

• a. the Schedule Method in H1/AS1 Fifth Edition Amendment 1, (4 August 2022) and H1/AS2 First Edition Amendment 1, (4 August 2022), or
• b. the Calculation Method in H1/AS1 Fifth Edition Amendment 1, (4 August 2022) and H1/AS2 First Edition Amendment 1, (4 August 2022), using construction R-values:
  
  • i. from the performance tables described in Acceptable Solution H1/AS1 Fifth Edition Amendment 1, (4 August 2022) Section F.1.2 or H1/AS2 First Edition Amendment 1, (4 August 2022) Section F.1.2 or
  • ii. calculated by the method in Verification Method H1/VM1 Fifth Edition Amendment 1, (4 August 2022) Appendix F Section F.1.2 or Verification Method H1/VM2 First Edition Amendment 1, (4 August 2022) Appendix F Section F.1.2.