B1/AS1: Structural provisions for buildings

B1 STRUCTURE ACCEPTABLE SOLUTION B1/AS1 Buildings and structures Figure 7.2.2: Reinforced concrete foundations in expansive soils for light wall claddings Forming part of the modifications to NZS 3604 for Clause 7.5.13.3.1 500 As top As top R10 @ mesh mesh 600 crs. DPM Note: It would be considered good practice to construct corner junctions with the longitudinal reinforcing lapping around the corners and to construct internal beams with longitudinal bars at standard 90° hooked into the perimeter beams to provide adequate anchorage. Figure 7.2.3: Reinforced concrete foundations in expansive soils for medium wall and heavy wall claddings Forming part of the modifications to NZS 3604 for Clause 7.5.13.3.1 Note: It would be considered good practice to construct corner junctions with the longitudinal reinforcing lapping around the corners and to construct internal beams with longitudinal bars at standard 90° hooked into the perimeter beams to provide adequate anchorage. MINISTRY OF BUSINESS, INNOVATION AND EMPLOYMENT 28 JULY 2025 Page 14 D e As bottom stirrups As bottom B1 stirrups 240 mm Additional H12 @ 300 crs. for De > 400 mm Additional 2/H12 @ 300 crs. for D1 > 400 mm External footing Internal thickening 1D 400 As top R10 @ 600 crs. mesh mesh As top D e stirrups As bottom Additional 2/H12 @ 300 crs. for 240 mm De or D1 > 400 mm nim 05 stirrups As bottom B1 External footing Internal thickening 1D