Publications

The Howe truss was patented in USA initially in 1840 and again in 1850 and went on to become one of the primary timber truss designs used in North America. The adaptation of the Howe truss in NSW into the two distinct forms known as the “Allan” and…

The New Zealand Transport Agency (NZTA) has owned and operated emergency Bailey Bridges for about 60 years. These bridges are available for emergency and semi-permanent use by public users (Central Government and Local Authority) and private users.

A 350m long bridge has been constructed over the Hunter River near East Maitland as part of Third Hunter River Crossing Project. The bridge consists of 12 spans of Super-T girders with central spans of 30m. The bridge is located in an area that is…

Inorganic zinc silicate coatings have been an attractive coating for steel bridges due their excellent long-term corrosion protection extending for up to 40 years. The re-coating of inorganic zinc silicate coatings has been regarded as a difficult…

For the design of concrete box girder bridges, many bridge design engineers adopt the shear and torsion design rules of the AASHTO LRFD Bridge Design Specification. However, with each new Edition of the AASHTO LRFD Bridge Design Specifications, the…

The needs for structural health monitoring in Japan originally come from its geographical conditions such as severe environment for deterioration and frequent natural disasters. Monitoring of the environment and loading conditions with respect to…

Structural analysis has progressed a long way from hand calculations and the use of distribution factors. From the first computer methods, grid and grillage analysis techniques evolved, leading through progressive enhancements to the advanced 3D…

This paper provides guidelines for load rating of existing bridges. It is based on internal notes regarding criteria and practice for load rating of bridges and consideration of multiple vehicle presence over structures with varying numbers of heavy…

This paper considers how several recent pedestrian-oriented bridges, all on Auckland’s Western Ring Route, provide new connections or re-establish severed connections between communities. As the architect involved in these bridges, I will also…

One of the most significant breakthrough developments in concrete technology at the end of the 20th century was that of ultra-high performance ‘ductile’ concrete (UHPdC) with compressive strength up to 200 MPa and remarkable improvements in…