10. OBoat Hire - RPEQ Design Report

3.4 Methodology
The pontoon units and piles have been designed in accordance with the following referenced
standards:

AS/NZ 1170.2- 2013                   Structural Actions- Wind Actions

AS1664.1 -1997                       Aluminium Structures- Limit State Design

AS 3962-2001                         Guidelines for Design of Marinas

AS4997-2005                          Guidelines for the Design of Maritime Structures

AS2159 -2009                         Piling- Design and Installation

AS3600- 2018                         Concrete Structures


3.5 Pontoon
The structural design loads for the pontoons include dead load, live load, wind, wave, and flood
load. The design of the pontoon deck slabs, and reinforcing was determined considering pattern
live loading and wave loading.

Pontoons have been designed to have a nominal freeboard of approximately 400mm (AS3962 – Clause
7.2.3.2).

3.6 Piles
Pontoon piles have been designed for wave, wind, berthing and mooring loads in accordance with
AS 3962 and AS 4997.

In the absence of a site-specific geotechnical report, it has been assumed that the piles will be embedded into
either dense sand or stiff clay.

Steel piles are to be wrapped in a 12mm thick HDPE tube extending 2000mm below the riverbed (AS 3962 –
Clause 5.3 (a)). Below this level piles have been provided with a corrosion allowance to achieve the required
25-year design life albeit the expectation is that a negligible amount of corrosion will occur due to the lack of
oxygen present (Pile Design and Construction Practice Sixth Edition, 2014, M. Tomlinson, J. Woodward, P509,
Section 10.4.2 - Steel Piles for Marine Structures).

The top of the pontoon restraint piles (RL 3.2m AHD) has been set 2.61m above HAT).


3.7 Gangway / Ramp
The gangway and ramp structures have been designed for the live loads specified in Clause 3.3.2. These
structures will be constructed using aluminium extruded sections of grade/temper 6351-T5 or 6063 and flat
plate sections of grade/temper 5083. All aluminium sections have been designed in accordance with AS
1664.1.




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