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Other types of structural bolts

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Other types of high-strength structural bolt include the TC (torque controlled) bolt and the DC (direct tensioned) bolt. These are installed on site in a different manner from those manufactured to AS/NZS 1252. The manufacture of TC and DC bolts is covered by different Standards, which include the correct marking to identify these types of bolt. Quality assurance practices should still be followed, such as written certification by the manufacturer that their product is to the relevant standard, and identification of the correct markings.

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This information is published by the Ministry of Business, Innovation and Employment’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people:

with compliance with the Building Act, it is published under section 175 of the Building Act
with a Weathertight Services claim, it is published under section 12 of the Weathertight Homes Resolution Services Act 2006.

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