Design, construction and maintenance of residential slabs is regulated by Australian Standard AS – Residential slabs and footings. Australian Standard AS – Time for a change. With specific reference to the slab heave problem with waffle rafts. Frank Van der Woude, B.E., Ph.D. AGS Vic. complying with the Australian Standard – AS referenced by the BCA. AS covers the design and construction of residential slabs and footings.

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No need to be fancy, just an overview. I would like to talk to some one from your department if possible. Your email address will not be published. One of the elements used to administer this change is the “Ys” range Ys being the measure of potential movement in mm of the soil. This Standard sets out the criteria for the classification of a site and the design and construction of a footing system for a single dwelling house, townhouse or similar structure which may be detached or separated by a party wall or common wall, but not situated vertically above or below another dwelling, including buildings classified as Class 1 and Class 10a in the Building Code of Australia.

These calculation changes will ultimately see waffle slabs being more heavily piered than previously. To understand more about how the changes to AS may affect your slab designs and consequently, slab costs, contact your engineer. For all sites in particular sites with reactive soils drainage and soil moisture conditions around the building need to be managed to avoid abnormal moisture conditions, as outlined in Clause 1.

Author Write something about yourself. For design purposes, the life of the structure is taken to be 50 years.


It also provides guidance on the design of footing systems, abiding by engineering principles. The table above highlights one of the most significant changes to the code, being the splitting of the “H” classification into two new classes, H1 and H2. Here are some of the key changes to this code and how they lead to a PolyVoid designed suspended slab-on-ground being highly competitive, and a solution for problem foundations and reactive soils.

Regards David my mobile is Photo Gallery – Installation. I would like to remove them due to safety and to prevent damage to the house and drainage.

Residential Slabs And Footings – Standards Australia

Rudimentary engineering calculations raised my initial concern that some standard slabs were not strong enough to withstand the combined effects of static ad2870 and dynamic foundation movement they had supposedly been designed to withstand.

Could you please send me austrlaian 7 page sample. For example, the introduction of the H2 classification sees the requirement for N16 reinforcing bars to be used in all edge beams and internal beams of the slab typical on a waffle slab. This is a free 7 page sample.

AS regulates site classification, design, construction and maintenance of residential slabs and footings. The Standard may also be used for other forms of construction, including stzndard light industrial, commercial and institutional buildings if they are similar to houses in size, loading and superstructure flexibility. Some of the reinforcing requirements for design have changed and have the potential to have a significant affect on the cost of a waffle slab.

Frank Van der Woude B. A soil’s Ys rating is its indication of movement potential. The position of the trees do not comply with the Australian building standards code but council is not supportive. Powered by Create your own unique website with customizable templates.


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The standard sets out the criteria for the classification of a site, and the design and. Economical designs that avoid significant damage are practicable only if the soil moisture content of the foundation material under the footing or slab is stable or within reasonable limits of stability over the design life of the house or structure.

AS — specifies performance criteria and specific designs for footing systems for foundation conditions commonly found in Australia. These changes will also see the cost of a “conventional” waffle go up as more piers will be specified in order to satisfy the new requirements of the code.

This Standard was published on 17 January Powered by Austraalian Ninja.

Because Local Authorities required professional engineer certification of residential slab and footing designs, I diligently assessed the structural adequacy of standard designs prescribed in AS Menu Home PolyVoid Management. There has also been a revision of the mesh requirements for ‘slab length’. This change applies to all slab designs across all site classification types.

Why PolyVoid Soil Characteristics. Subsequent in-depth research revealed that the theory underlying the prescription of standard slabs in Australiaj is seriously technically australlan, consequently causing an unprecedented and unsustainable level of incidence of premature failures.

The footing systems for which designs are given include slab on ground, stiffened rafts, waffle rafts, strip footings, pad footings and piled footings. The previous code revision called for reinforcing mesh to be upgraded to the next qustralian when a concrete slab was greater than 25 metres in length.

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