Latest Publications

Description Category Date Author
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
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
Bolted Splices in Compression - Splice Plate Member Checks

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...

CON3101.pdf
Connections 24/02/2012 Kevin Cowie; Alistair Fussell
Heavy Brace Gusset Design Example

This worked example illustrates the ductile design of brace/beam/column gusset plate connection. The example is based on the design approach presented in Steel Advisor CON1301.

CON1303.pdf
Connections 27/07/2011 Kevin Cowie; Alistair Fussell
Heavy Brace Gusset Plate Connections for Braced Steel Frames

Heavy brace gusset connections for the purposes of this paper are defined as gusset plates that connect large tubes (circular and square) or buckling restrained braces used in braced frames (concentric and eccentric) for medium and high ris...

CON1301.pdf
Connections 20/07/2011 Alistair Fussell
Light Brace Cleat Connections for Braced Steel frames

Light bracing cleat connections are defined as unstiffened cleats that connect light bracing such as flat bars, rods or small tubes sections (round or square) to beams or columns (figure 1). These types of bracing systems are typically used...

CON1302.pdf
Connections 25/05/2011 Alistair Fussell
Transverse Slotted Holes Design Bearing Strength

No distinction is made in the Steel Structures Standard NZS 3404 (SNZ, 2007) between the design ply bearing capacity for a long slotted hole in which the slot is perpendicular to the direction of the bearing load and a standard circular hol...

CON3001.pdf
Connections 27/10/2009 Kevin Cowie
Semi-Rigid Sliding Hinge Joint

The Sliding Hinge Joint (SHJ) is a new semi-rigid joint system developed for moment resisting steel frames. It has the ability to remain rigid under in-service conditions or ultimate state wind loading, and to rotate under severe earthquake...

CON1101.pdf
Connections 26/08/2009 Kevin Cowie
CHS Collar Joints

This article presents a method for designing the collar joints of a moment connection between an I section beam and a circular hollow section (CHS) column. The procedure is developed principally for the semi-rigid flange bolted joint (FBJ)....

CON1002.pdf
Connections 26/08/2009 Kevin Cowie
Moment End Plate - Column Side

Standard moment end plate connections (MEP) have been developed by Steel Construction New Zealand Inc. The design procedures are presented in Structural Steelwork Connections Guide: Design Procedures, SCNZ 14- 1:2007 (Hyland et al, 2008). T...

CON1001.pdf
Connections 26/08/2009 Kevin Cowie
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Bolted Column Splices with Minor Axis Bending

Written by Zahid Hamid; Kevin Cowie on February 19th, 2015.      0 comments

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 types of splice connection, full contact bearing and non-bearing. As the name suggests in bearing splices the axial load is transferred directly to the column below by full bearing contact, bolts and plates are intended to hold columns in place. In non-bearing splices the load is transferred through bolts and splice plates.
 
The design of bolted column splices with minor axis bending moment, ie two way moment resisting frames, is a complex process. There is not much literature available on this topic. A design guide that briefly discusses this topic is the South African Institute of Steel Construction’s Structural Steel Connections Guide or the “Green Book”. Another source of guidance is the Steel Construction Institute Publication 207, which covers the non-bearing splices with minor axis bending.
 
This article will cover design of bearing and non-bearing splice connections with minor axis bending based on the procedures outlined in the aforementioned guides, and relate the design equations to NZS 3404.
Topics: Coating Connections
 

Web Side Plate Rotation Capacity

Written by Kevin Cowie; Alistair Fussell on December 18th, 2013.      0 comments

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 accepted fabrication industry norms. Specification of these connections also facilitates the development of reliable cost estimates by designers, fabricators, consulting quantity surveyors and constructors.
Topics: Coating Connections
 

Bolted Splices in Compression - Splice Plate Member Checks

Written by Kevin Cowie; Alistair Fussell on February 24th, 2012.      0 comments

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 accepted fabrication industry norms. Specification of these connections also facilitates the development of reliable cost estimates by designers, fabricators, consulting quantity surveyors and constructors.
Topics: Coating Connections
 

Heavy Brace Gusset Design Example

Written by Kevin Cowie; Alistair Fussell on July 27th, 2011.      0 comments

This worked example illustrates the ductile design of brace/beam/column gusset plate connection. The example is based on the design approach presented in Steel Advisor CON1301.
Topics: Coating Connections
 

Heavy Brace Gusset Plate Connections for Braced Steel Frames

Written by Alistair Fussell on July 20th, 2011.      0 comments

Heavy brace gusset connections for the purposes of this paper are defined as gusset plates that connect large tubes (circular and square) or buckling restrained braces used in braced frames (concentric and eccentric) for medium and high rise applications. This includes both corner and midspan gusset plate connections (figure 1). While the guidance in this paper pertains principally to gusset plate connections, the principles will also be applicable to UC brace/beam/ column connections. Reference is made to HERA Design and Construction Bulletins (Clifton 1998, 2000, and 2001) that cover this situation.
Topics: Coating Connections
 

Light Brace Cleat Connections for Braced Steel frames

Written by Alistair Fussell on May 25th, 2011.      0 comments

Light bracing cleat connections are defined as unstiffened cleats that connect light bracing such as flat bars, rods or small tubes sections (round or square) to beams or columns (figure 1). These types of bracing systems are typically used in low rise industrial and retail buildings as roof and wall bracing (Hogan and Collins, 2010).
Topics: Coating Connections
 

Transverse Slotted Holes Design Bearing Strength

Written by Kevin Cowie on October 27th, 2009.      0 comments

No distinction is made in the Steel Structures Standard NZS 3404 (SNZ, 2007) between the design ply bearing capacity for a long slotted hole in which the slot is perpendicular to the direction of the bearing load and a standard circular hole. See figure 1. While the presence of a slotted hole does not reduce ply bearing capacity based on strength, there is increased hole elongation for a given bolt shear force compared to a standard hole. In this article, a design equation based on North American practice is presented for design ply bearing capacity limited by hole elongation. This equation will be applicable for situations such as seismic loading, where increased hole elongation associated with slotted holes loaded transverse to the direction of the bearing load is undesirable.
Topics: Coating Connections
 

Semi-Rigid Sliding Hinge Joint

Written by Kevin Cowie on August 26th, 2009.      0 comments

The Sliding Hinge Joint (SHJ) is a new semi-rigid joint system developed for moment resisting steel frames. It has the ability to remain rigid under in-service conditions or ultimate state wind loading, and to rotate under severe earthquake loadings, returning to the rigid state when the severe earthquake stops. The joint is designed and detailed such that there is negligible damage to the frame or slabs. The joint has a similar cost to conventional construction.
Topics: Coating Connections
 

CHS Collar Joints

Written by Kevin Cowie on August 26th, 2009.      0 comments

This article presents a method for designing the collar joints of a moment connection between an I section beam and a circular hollow section (CHS) column. The procedure is developed principally for the semi-rigid flange bolted joint (FBJ). However the principles can be applied in general to other types of connections. The design procedure has been taken and slightly modified from (Clifton, 2005).
Topics: Coating Connections
 

Moment End Plate - Column Side

Written by Kevin Cowie on August 26th, 2009.      0 comments

Standard moment end plate connections (MEP) have been developed by Steel Construction New Zealand Inc. The design procedures are presented in Structural Steelwork Connections Guide: Design Procedures, SCNZ 14- 1:2007 (Hyland et al, 2008). The connection details are given in table form in SCNZ 14-2:2007 (Hyland et al, 2008). However these publications only provide details for the beam side of the MEP connection. The column side aspects are not covered and reference is given to guidance in HERA Report R4-142:2007 (Clifton et al, 2007). This article updates the guidance and design example given in this publication and presents the design procedure consistent with the SCNZ publications. Development of software based on these procedures is being developed and this is briefly discussed.
Topics: Coating Connections
 
   
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