B1/AS1: Structural provisions for buildings

B1 STRUCTURE ACCEPTABLE SOLUTION B1/AS1 Definitions Term Definition and shrinking, frost heave, changing ground water level, erosion, dissolution of soil in water, and effects of tree roots. COMMENT: Soils (excepting those described in (a), (b) and (c) above) tested with a dynamic cone penetrometer in accordance with NZS 4402 Test 6.5.2, shall be acceptable as good ground for building foundations if penetration resistance is no less than: a) 5 blows per 100 mm at depths down to twice the footing width. b) 3 blows per 100 mm at depths greater than twice the footing width. Depths shall be measured from the underside of the proposed footing. Non-combustible Material that meets the criteria for a non-combustible material in Section 8.1 of the Building Product Specifications. Territorial Authority means a city council or district council named in Part 2 of Schedule 2 of the (TA) Local Government Act 2002; and— a) in relation to land within the district of a territorial authority, or a building on or proposed to be built on any such land, means that territorial authority; and b) in relation to any part of a coastal marine area (within the meaning of the Resource Management Act 1991) that is not within the district of a territorial authority, or a building on or proposed to be built on any such part, means the territorial authority whose district is adjacent to that part. MINISTRY OF BUSINESS, INNOVATION AND EMPLOYMENT 28 JULY 2025 Page 20