BRANZ works published before April 2011
All BRANZ works published before April 2011 may not fully incorporate the E2/AS1 Amendment 5 revisions.
Building Basics: Building Code Compliance
Download 2014 update supplement
Building Basics: Building Controls
First edition withdrawn. Second edition in production.
Download 2015 update supplement
Note that, while E2/AS1 only requires ventilation under suspended timber floors, BRANZ recommends as good practice that ventilation is also designed for under suspended concrete slab floors.
Download Bulletin 478 supplement.
Download Bulletin 481 supplement.
|At 3.1.5, the bulletin states: "An air vent must be included just before a connection into a septic tank." A vent is optional: it is not a requirement of the Building Code.|
Figure 6(b) - The tread dimension should read 266 to give a 35º pitchline. Figure 6(c) - The pitchline for the dimensions given should be 31.85º and not 33.1º as noted.
Paragraph 12.0.2 of this bulletin refers to shrinkage control joints and states that: "Mesh reinforcing to the slab must stop each side of the joint." This is not correct - stopping the reinforcement each side of the joint creates a ‘free joint', not a shrinkage control joint. The mesh in a reinforced concrete slab on ground should not be cut when cutting/forming a shrinkage control joint. See Build 84 Oct/Nov 2004 p35 for more information.
Download Bulletin 504 supplement for amendments to some calculation examples.
|Bulletin 533 Green roofs - an overview|
This bulletin refers to NZBC clause B2 Durability, and states in paragraph 4.1.2 that: "The main roof components must be provided with a durability of not less than 50 years." Where a green roof system is designed so that it is considered moderately easy to repair/replace the waterproofing system (by removing the growing medium), it is believed that a durability that is equal to the serviceable life of the garden system, but not less than 15 years, would be appropriate for the waterproofing system. A durability of not less than 50 years would still apply to the supporting structure.
Amendment 11 to compliance document B1/AS1 requires the use of grade 500E mesh for concrete slab-on-ground reinforcing. This change applies to slabs on ground being built to NZS 3604:2011, NZS 4229 and NZS 4299. Bars within the foundation must also be ‘E' type steel to ensure they have sufficient ductility but may be either grade 300E or grade 500E. Paragraph 4.6.1 of Bulletin 541 incorrectly asserts that all steel bars within the foundation wall must be grade 500E.
|Engineering Basis of NZS 3604|
Versions of this publication downloaded from the BRANZ website prior to 6 June 2014 had the following errors:
Versions of this publication downloaded from the BRANZ website between 6 June 2014 and 26 January 2015 had the following error:
Download the corrected version.
Download 2008 update supplement.
Download November 2006 update.
This incorrectly states that the maximum permitted area for the construction, alteration or removal of any fabric, glass or metal awning on any building without a consent is 50 m2. The maximum permitted area should read 20 m2 (previously 15 m2).
|House Building Guide (3rd edition)|
Foundation walls covered in Section 7 of NZS 3604:2011 Timber-framed buildings require 2 x D12 bars in the wall footing. The options that allowed wall footings with single D12 bars have been deleted as a result of the B1/AS1 Amendment 11 modifications to NZS 3604:2011. These modifications deleted Figures 7.13(A), 7.14(A), 7.15(A) and 7.16(A) from the standard.
This change affects Figures 9.8, 9.9, 9.11, 12.1, 12.2, 12.4, 12.5, 12.6, 12.10 and 14.7 in the House Building Guide. These figures show a single D12 bar where 2 D12 bars are now required. Table 10.1 also needs to be amended to show that a minimum of 2 x D12 bars are required in the footing for a single-storey construction.
On the species data sheets, pages 53-142, the strength group data for seasoned and unseasoned timber has been transposed. The strength rating given for seasoned is actually for unseasoned and vice versa.