Latest Publications

Description Category Date Author
The New Zealand Structural Steelwork Specification in Compliance with AS/NZS 5131: Key Elements to Managing the Compliance of Fabricated Structural Steelwork

The Structural Steelwork – Fabrication and Erection standard AS/NZS 5131 (SA/SNZ, 2016c), is cited as an acceptable standard for demonstrating compliance with the Building Code. This standard published in 2016, was developed in respo...

FAB2001.pdf
Fabrication 18/02/2019 Alistair Fussell, Kevin Cowie, Michail Karpenko
Practice Note on the Sourcing of Compliant High Strength Structural Bolts

The New Zealand Steel Structures Standard states that high strength structural bolts shall be supplied to AS/NZS 1252.  This standard underwent a major revision and was published on 23rd December 2016. The major technical changes incor...

MAT1010.pdf
Materials 20/03/2018 Kevin Cowie, Stephen Hicks, Raed El Sarraf
Practice Note on the Sourcing of Threaded Rod Used for Foundation Bolts

Threaded bars are commonly used in the structural engineering industry. It is used as replacement for long bolts as well as for concrete anchors and foundation bolts.  This product is not covered under New Zealand Standard AS/NZS 1252...

MAT1011.pdf
Materials 20/02/2018 Kevin Cowie, Alistair Fussell
Basis for and Implications of Key Changes to 2016 Structural Steel Product Standards

In April 2016, the suite of AS/NZS structural steel product standards were republished (AS/NZS 1163, 3678, 3679.1-2) (SA/NZS, 2016). This paper provides a summary of the key changes, the basis for these changes and interim recommendations u...

MAT1009 .pdf
Materials 01/03/2017 Alistair Fussell, Kevin Cowie, Stephen Hicks, Michail Karpenko
Checklist for Imported Structural Steelwork

The globalisation of the structural steel supply chain has sparked concern over the quality of fabricated steelwork in New Zealand building projects when sourced from low-cost countries. Demonstrating compliance of imported material with th...

QLT1002.pdf
Quality 28/06/2016 Alistair Fussell, Kevin Cowie, Dr Michail Karpenko, Dr Stephen Hicks
Ensuring Compliance of Structural Steelwork – Regardless of Origin

This article was first published in SESOC Journal Volume 29 No 1 April 2016. The globalisation of the structural steel supply chain has sparked concern over the quality of fabricated steelwork in New Zealand building projects when source...

QLT1001.pdf
Quality 28/06/2016 Alistair Fussell, Kevin Cowie, Dr Stephen Hicks, Dr Michail Karpenko
Welding to AS/NZS 1554.1 of Boron Containing Steel

Recent reports indicate that some imported steel may show elevated levels of boron; traditionally steel in Australia and New Zealand has been made without boron additions.  The welding requirements of AS/NZS 1554 have been established ...

WEL1003.pdf
Welding 02/05/2016 Dr Michail Karpenko, Dr Stephen Hicks, Alistair Fussell
Changes to specifying inorganic zinc silicates to AS/NZS 2312

Australian/ New Zealand Standard AS/NZS 2312 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings provides guidelines for selection and specification of coating systems for co...

CTG1009.pdf
Coatings 29/04/2016 Kevin Cowie
AS/NZS 5131 – Why Another Fabrication and Erection Standard?

1.0 Introduction  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 fabrica...

GEN2003.pdf
General 17/04/2016 Alistair Fussell; Dr Stephen Hicks; Dr Michail Karpenko
Paint Coating Selection and Specification: Changes to AS/NZS 2312

Australian/ New Zealand Standard AS/NZS 2312 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings provides guidelines for selection and specification of coating systems for corrosion pr...

CTG1008.pdf
Coatings 23/02/2016 Kevin Cowie
Specifying Impact Toughness of Steel Plates for End Plate Connections in Seismic Lateral Resisting Frames

Structures designed to the Steel Structures Standard, NZS 3404, are required to be able to resist collapse under a maximum considered earthquake as directed by the Loadings Standard, NZS 1170.5. Brittle systems are not permitted. The nature...

MAT1008.pdf
Materials 27/02/2015 Kevin Cowie; Alistair Fussell
Bolted Column Splices with Minor Axis Bending

In multistory construction columns splices are provided for convenience of fabrication, transport and erection. If required the splices are located just above the floor level, which enables easy access to the joint.   There are two t...

CON3102.pdf
Connections 19/02/2015 Zahid Hamid; Kevin Cowie
Heat Input Limits of Welding Consumables for Earthquake Resisting Structures

The Steel Structures Standard, NZS 3404, references the AS/NZS 1554 suite of standards for compliance of welding consumables. NZS 3404 includes additional requirements limiting the heat input in the deposited weld metal for welds subject to...

WEL3001.pdf
Welding 24/04/2014 Alan McClintock; Kevin Cowie
Development and Research of Eccentrically Braced Frames with Replaceable Active Links

Ductile eccentrically braced frames designed in accordance with the New Zealand Steel Structures Standard, NZS 3404, provide life safety during a design level or greater earthquake; however, the eccentrically braced frame active link may su...

EQK1005.pdf
Earthquake 24/04/2014 Alistair Fussell; Kevin Cowie; Charles Clifton; Nandor Mago
Welding Consumables and Design of Welds

The Steel Structures Standard, NZS 3404, references the AS/NZS 1554 suite of standards for compliance of welding consumables. New editions of the AS/NZS 1554 suite of welding Standards have recently been published and these refer to newly ...

WEL1002.pdf
Welding 28/02/2014 Kevin Cowie; Alan McClintock
Specifying Steel for Seismic Lateral Resisting Frames

There are three common seismic frame types used in New Zealand. These are the eccentrically braced frame (EBF), concentrically braced frame (CBF) and moment resisting frame (MRF). See figure 1. All steel seismic-resisting systems are req...

MAT1007.pdf
Materials 27/02/2014 Kevin Cowie; Alistair Fussell
Web Side Plate Rotation Capacity

The Steel Construction New Zealand publication Steel Connect (SCNZ 14.1 and SCNZ 14.2) provides structural engineers with a rapid and cost-effective way to specify the majority of structural steelwork connections, in accordance with accepte...

CON1201.pdf
Connections 18/12/2013 Kevin Cowie; Alistair Fussell
Eccentrically Braced Frames Lateral Restraint of Link Bottom Flange

Eccentrically braced frames are required to be laterally restrained at both the top and bottom of the active link member ends to ensure reliable performance in a seismic event. There are occasions when direct lateral restraint to the botto...

EQK1009.pdf
Earthquake 18/12/2013 Kevin Cowie; Alistair Fussell; Charles Clifton
Design of the Linked Column Frame Structural System - A New Zealand Application

The Link Column Frame (LCF) system is a brace free hybrid system combining proven seismic load resisting technology; eccentrically braced frames (EBF) with removable links and moment resisting frames (MRF). It was developed to meet the requ...

EQK1010.pdf
Earthquake 04/06/2013 Alistair Fussell, Peter Dusicka, Charles Clifton, Martin Wong
Composite Steel Beam Behaviour with Precast Rib Flooring

Floors consisting of precast ribs supported on structural steel beams and in situ structural topping are a common form of composite floor construction. In this article guidance is given on the modifications required to previously published ...

CMP1002rev1.pdf
Composite 14/05/2013 Kevin Cowie, Stephen Hicks, Alistair Fussell
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Design Example - Analysis and Design of Jib Crane Boom

Written by Charles Clifton; Kevin Cowie on July 14th, 2010.      0 comments

This article provides an example of how to design the boom of a jib crane to NZS 3404 (SNZ, 2007). This example illustrates the use of second order and restraint requirements of NZS 3404.
Topics: Coating Structural Analysis
 

Design Example of Moment Resisting Seismic Frames with Reduced Beam Sections

Written by Kevin Cowie on July 9th, 2010.      0 comments

The design of moment resisting seismic frames can by optimised with the use of reduced beam sections. In a reduced beam section (RBS) moment connection (figure 1), portions of the beam flanges are selectively trimmed in the region adjacent to the beam to column connection. Yielding and hinge formation are intended to occur primarily within the reduced section of the beam and there by limit the design actions and the inelastic deformation demands developed at the face of the column. The development, research, design rules, design consideration and benefits of the RBS are covered in previous Steel Advisor articles EQK1002 and EQK1003. This article illustrates the application of the RBS design rules by way of a design example.
Topics: Coating Earthquake
 

Design Considerations and Benefits of Moment Resisting Seismic Frames with Reduced Beam Sections

Written by Kevin Cowie on July 9th, 2010.      0 comments

The design of moment resisting seismic frames can by optimised with the use of reduced beam sections. In a reduced beam section (RBS) moment connection (Figure 1) portions of the beam flanges are selectively trimmed in the region adjacent to the beam to column connection. Yielding and hinge formation are intended to occur primarily within the reduced section of the beam and there by limit the design actions and the inelastic deformation demands developed at the face of the column. The development, research and design rules of this type of connection are discussed in a previous Steel Advisor article EQK1002. This article highlights some of the design considerations and benefits of using reduced beam sections with moment resisting seismic frames.
Topics: Coating Earthquake
 

Research, Development and Design Rules of Moment Resisting Seismic Frames with Reduced Beam Sections

Written by Kevin Cowie on July 9th, 2010.      0 comments

Structural design for large seismic events must explicitly consider the effects of response beyond the elastic range. The moment resisting seismic frame is designed to form beam plastic hinges near the face of the column. After the discovery of brittle fractures in steel moment frame welded connections in the 1994 Northridge earthquake in California, the reduced beam section (RBS) moment connection was developed and is now extensively used throughout North America and other parts of the world. The intent of the RBS is to move the plastic hinge region away from the face of the column (figure 2). This is accomplished by reducing the beam's actual plastic moment by removing part of the beam flange as shown in figure 1. This reduced section creates a weaker location where yielding and plastic hinge formation is expected to occur, and results in a reduced moment that develops at the face of the column. By reducing moment demands at the column face the beam-column connections and the column panel zone requirements are reduced. Further more, the use of RBS may also lead to smaller column sizes.
Topics: Coating Earthquake
 
   
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