Masterspec

CONSULTATION OPEN ON B1/VM1 AND LOOP BAR CONNECTIONS

06 Oct 2017

MBIE is seeking your feedback on proposals to amend Verification Method B1/VM1 and to ban loop bar connections of flange-hung double-tee precast flooring. The consultation runs from 27 September to 20 November 2017.

MBIE is proposing to:

  • update Verification Method for B1 Structure B1/VM1 to cite the latest version of NZS 3101:2006 Concrete Structures Standard: Part 1–The Design of Concrete Structures, (ie Amendment 3)
  • update Verification Method for B1 Structure B1/VM1 to replace sections of NZS 3404 Part 1:1997 Steel Structures Standard to reflect current practice for steel fabrication and construction
  • ban the use of the loop bar (also known as ‘pigtail’) connection detail associated with the support of precast concrete flange hung double-tee flooring units.

The proposed amendments are part of MBIE’s response to the investigation into the performance of Statistics House in the 14 November 2016 Hurunui/Kaikōura earthquakes and recommendations from the Canterbury Earthquakes Royal Commission.

Modifications to the referencing of NZS 3404: Part 1:1997 are not related to the Statistics House investigation, but are a timely update that will ensure B1/VM1 remains relevant to the steel industry.


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