Stebonheath Park Boardwalk Renewal

Introduction

Incon was engaged to undertake Level 2 structural inspections and structural adequacy assessments for multiple boardwalks and viewing platforms at Stebonheath Wetlands, Andrews Farm. The project formed part of a broader renewal initiative to upgrade public infrastructure within a high-use recreational environment.

Project
description

The project involved inspection and assessment of five assets, including:

3 boardwalk structures
2 viewing platforms

These structures are located within an active public wetland environment featuring walking trails, recreational areas, and community use.

Key aspects of the project included:

Detailed Level 2 inspections in accordance with AS 5100 and Austroads guidelines
Assessment of existing steel framing and timber decking systems
Evaluation of structural condition including corrosion, deformation, and joint integrity
Review of proposed replacement decking systems (FRP / recycled materials)
Determination of structural adequacy for future imposed loads

Challenge

The project presented several inspection and engineering challenges:

Multiple assets across a live public environment, requiring staged inspections and safe access planning
Exposure to harsh environmental conditions, including moisture, corrosion, and weathering
Deterioration of structural components, including:

o Corrosion of steel elements
o Degradation of timber decking
o Joint and connection deterioration

Public safety considerations, particularly for:

o Pedestrian access routes
o Structures used by nearby school students

Assessment of existing structures for new decking systems, requiring validation of load capacity and compatibility
Limited access to certain structural elements, requiring reliance on visual and close inspection methods

Solution

A systematic and standards-compliant inspection and assessment methodology was implemented:

Undertook Level 2 inspections of all accessible structural elements, including:

o Superstructure (decking, beams, handrails)
o Substructure elements (supports and connections)

Captured detailed photographic records of defects for reporting and analysis
Assigned condition ratings in accordance with industry guidelines
Evaluated structural capacity of existing members against proposed decking loads
Identified critical defects and deterioration mechanisms, including corrosion and joint failures
Developed targeted remedial recommendations, including:

o Repair or replacement of deteriorated members
o Surface treatment and coating upgrades
o Additional supports where required for new decking systems

Provided structural adequacy statements confirming whether existing structures could support proposed upgrades

Value
Delivered

Delivered comprehensive condition assessments across multiple assets within a single coordinated framework
Enabled informed decision-making for asset renewal and maintenance planning
Ensured compliance with Australian Standards and Austroads inspection requirements
Identified early-stage defects, reducing long-term maintenance costs
Supported safe implementation of new decking systems, ensuring structural reliability
Minimised disruption to public use through efficient inspection planning and execution

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