Combined Approved Plans RAL21/0003

                Total Concept Homes                                                                                   20332-001-Rev1
                                                                                                                       22 March 2021




                             Text Figure 10: Footing depth required to minimise the risk of undermining and surcharge loading

                Footing bases must be cleaned following mechanical excavation to expose undisturbed materials over the
                full base area. Should bored piles be adopted, it is recommended that the piling contractor have a ‘mud
                bucket’ or similar device to enable clean out of the pile bases. ‘Spinning’ of the augers is not acceptable
                and will not sufficiently remove drill spoil from pile bases. A suitably qualified and experienced engineer
                should inspect the footing excavations to confirm appropriate foundation materials and cleanliness prior to
                pouring concrete.
                If any soil conditions encountered during construction are found to differ from those noted above, Tectonic
                must be notified immediately and an inspection carried out to determine if changes to footing design are
                required.

                4.4       Retaining Structures
                Any retaining walls must be founded as described in Section 4.3 above. Engineer design and certification of
                retaining walls is required where such walls:
                          Exceed 1 m height.
                          Are subjected to surcharge loads (e.g. from backslope, adjacent structures, etc.).
                          Are located within close proximity to existing structures.

                Retaining structures should be engineer designed in accordance with AS4678-2002 Earth-retaining
                structures. We suggest the following parameters may be adopted for retaining wall design:




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Document Set ID: 21426326
Version: 1, Version Date: 24/03/2021