In New Zealand we have the undesirable situation of an aged Structural Steel standard by international standards and we also have two sets of standards provisions that address the minimum requirements for the fabrication and erection of structural steelwork (NZS 3404:1997 – including amendments 1&2 and NZS 3404.1:2009) This is compounded by the fact that that the most recent provisions are not cited as a verification method document.
The introduction of a new joint Australia/ New Zealand structural steelwork fabrication and erection standard on the face of it appears to be adding to the problem. In this paper the rationale for developing this new standard is discussed along with an outline of its content and a vision of how this standard might fit within a suite of AS/NZS standards covering the design, fabrication and erection of composite and non- composite structures in New Zealand
In October 2009, Steel Construction New Zealand Inc. (SCNZ), ran technical seminars throughout NZ. One of the topics covered was 'Portal Frame Design Tips', presented by the Manager of SCNZ, Clark Hyland. These proceedings outline the main message delivered on this topic at the seminar series and were edited by Kevin Cowie. This paper summarises material predominantly from two Australian Steel Institute (Woolcook et al, 1999; Hogan et al, 1997), and one Steel Construction Institute (Salter, 2004) publications, contextualised for New Zealand practice in accordance with the New Zealand Steel Structures Standard NZS 3404 (SNZ, 2007). The use of these referenced documents in particular are gratefully acknowledged.
Although buildings are often constructed using flexible materials, roof and structural expansion joints are required when plan dimensions are large. The maximum distance between expansion joints is dependent upon many variables, including ambient temperature during construction and the expected temperature range during the lifetime of the building. This article summarises North American practice with respect to spacing of thermal movement joints (AISC, 2003). This is based upon Federal Construction Council Technical Report No 65: Expansion Joints in Buildings and recommendations by (Fisher, 2005).
New Format of NZS 3404 The steel structures standard is being separated into seven inter-related parts as follows. The first part, NZS3404.1 is due for release mid-2009: NZS 3404.1 Steel structures â€“ Materials, fabrication, and construction NZS 3404.2 Steel structures â€“ Structural analysis NZS 3404.3 Steel structures â€“ General design of members and connections NZS 3404.4 Steel structures â€“ Design of composite members NZS 3404.5 Steel structures â€“ Design for fire NZS 3404.6 Steel structures â€“ Design for fatigue NZS 3404.7 Steel structures â€“ Design for earthquakes The commentary section is being brought into the body of the Standard and is located against each relevant clause. This will facilitate interpretation and usability, removing the isolation of the commentary from every day use of the standard.
The current format of the Steel Structures Standard (SNZ 2007) is to be reconfigured. The standard will be broken into seven parts. The construction part will incorporate material selection, fabrication, corrosion protection and erection aspects of the Standard (SNZ 2007).