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Calculate the number of adjustable pedestals for a rectangular deck from its dimensions and the maximum centres allowed by the selected system.
This calculation uses a rectangular deck and an orthogonal grid. The entered centres are calculation limits, not statutory values.
The calculation places one pedestal line at each edge, then divides each axis into intervals no greater than the entered maximum centres.
Check the grid, permissible loads, edge supports and any extra pedestals in the installation instructions for the selected slab or joist system. The final layout may require more pedestals.
The result counts the intersections of a rectangular grid, including both perimeter lines. It gives you a starting layout and a budget based on your unit price.
Permitted centres depend on the slabs, joists, loads and pedestal system. Always use the limits stated in the manufacturer’s installation instructions.
