Attachment B Eng report

e Floor slabs laterally restrained by raking piles will provide
additional permanent horizontal strutting to the base of retaining
walls.

e Excavated sand can be removed by small hoist, conveyor belt,
or crane to dump trucks and used as excellent clean fill at
another project

e Piling contractors have advised it is quite feasible to move the
CFA piling machine on rubber matting or use rubber tyres on
the tracks from the Seaview Terrace cul-d-sac to the site

e Once the contiguous piled retaining systems, piling, screw piles
and raking piles are in place (gradually progressing downslope),
the remaining work will be typical load-bearing walls and formed
in-situ reinforced concrete construction

e Sub-floor drainage will be connected through all contiguous
piled walls into vertical “wick” drains at approx. 6m centres

e Separate subfloor drains will be provided to relieve any
localised ground water build-up.

e Grout piled walls will be patched and grouted where necessary

e A “dry” internal masonry wall and drained cavity will be provided
at all contiguous piled retaining walls

e Back-fill over URETEK grouting with topsoil and re-vegetate for
perimeter planting as per Landscape Details

4.0 Design Loading Criteria

4.1

4.2

General

The following outlines the design loading criteria for the project.
Notwithstanding this outline, the structure will allow for all imposed
loads as outlined by the relevant Australian codes, and any loads
imposed from the selected construction methodology for the project
works. The loads during construction of the contiguous piled wall
must be analysed at every incremental stage of excavation and
strutting.

Construction loads, especially loaded trucks and stored materials
will be agreed and confirmed with Contractor prior to
commencement of construction. This is particularly important for
the first stage construction of the driveway slab.

Codes and Specifications

The structural design of the project will be carried out in accordance
with the relevant Australian Standard Codes of Practice including
but not limited to the following:

AS/NZS 1170 Part 1 Loading Code Dead and Live
AS/NZS 1170 Part 2 Loading Code Wind

AS/NZS 1170 Part 4 Loading Code Earthquakes
AS 3600 Concrete Structures

* *& & &

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