as 3700 masonry structures - engineers australia · engineers australia, level 11, 108 king william...
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AS 3700 Masonry Structures
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Wednesday 16 May, 2018
5:30pm registration for a
6:00pm start, 7:30pm finish
Engineers Australia, Level 11, 108 King William Street, Adelaide
AS 3700 Masonry Structures standard has great significance in building construction, and it is likely that changes that have been approved by the BD-004 standards committee will remove several barriers to the use of masonry. The Standard has been under review for some time, in anticipation of its adoption in the 2019 version of the National Construction Code (NCC), and the new standard will give greater flexibility to users when building with masonry. Some of the important changes have arisen from extensive research carried out by the Concrete Masonry Association (CMAA) in collaboration with the Queensland University of Technology. This work investigated the detailing and design of reinforced masonry walls and found that the current standard is overly conservative, because it unnecessarily limits the allowable grout strength designers can use, and it underestimates the contribution provided by grout to the compressive strength of reinforced masonry.
Unpractical requirements to laterally restrain the vertical steel in both horizontal directions do not provide any benefit to the walls compressive capacity. Existing provisions require walls that are not laterally reinforced to be treated as unreinforced masonry.
As a result of these findings, the new standard will reduce stringent detailing provisions, remove grout strength limitations, and recognise the grout’s true contribution to compressive strength. This will enable designers to create more competitive designs due to higher allowable capacities, especially considering most reinforced masonry walls as designed as if they were unreinforced. The standard has also been redrafted to provide guidance on the use of stack bonded masonry, which is increasingly being used by designers in modern construction.
The presenters will discuss the new standard, the research that supports it, and the implications of this work for the construction industry.
Speakers Professor Manicka Dhanasekar, Queensland University of Technology Jake Ring , Concrete Masonry Association of Australia, ThinkBrick Australia and the Roofing Tile Association of Australia Arlene Nardone, National Engineering Manager, Adbri Masonry
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