Sub floor columns (stumps) support the house off the ground and help to provide a level platform when building on a slope. As a result, bracing must be designed to ensure there is no sway with general foot traffic, or from other natural forces such as wind.
Typically, you will see cross bracing made with steel rods fixed to the columns in a ‘x’ pattern. Tie-downs keep the footings, stumps and structure above from lifting and separating.
Our sub floor structural design process involves:
Also known as stumps, sub floor columns are used to elevate the house to provide a level floor — most commonly when building on sloping blocks. Stumps are often seen with decks as well as under the main floor space. If building in a flood prone area, it is also a requirement to raise the floor level of a dwelling above the designated flood level. A suitable sub floor column and bracing design is critical to ensuring structural adequacy in these situations.
A PDF report is compiled and signed by a registered professional engineer. The design details include (where applicable) the following elements:
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With data across hundreds of thousands of soil tests, we’ve developed regional profiles of soil compositions, along with wind ratings and other ‘site estate specific’ data. This means we can understand an estate as a whole rather than a single site.
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