Balpara was engaged by SMEC Australia to conduct a site investigation at the Upper Ferntree Gully Railway Station car park, and perform a structural integrity assessment of the public lighting poles on site. 

Project Overview

We were tasked with performing a thorough site investigation and structural integrity assessment based on the relevant Australian Standards and Supplements. 

Balpara managed the investigation and reporting on the structural integrity of nine reinforced concrete power and light poles, which were evaluated to determine whether they could support additional loading of CCTV electrical cables.

These reinforced concrete poles are estimated to be 70 years old, and no structural designs or specifications were made available to determine the structural composition, footing type or depth of the poles. 

Project Scope

• Measuring poles for deflection by connecting towing straps, a hanging scale and a vehicle to the pole, and applying pressure of over 300kg for several minutes. 
• Conducting lateral deflection using a spirit level to determine the amount poles were leaning out of plumb. 
• Assessment of site area to identify terrain or infrastructure that might inhibit structural integrity of the poles, such as drainage culverts and slopes. 
• Surveying of overhead powerlines to check for sag and ground clearances. 
• Preparation of structural integrity assessment report outlining works performed and recommendations regarding the ability of poles to bear additional load. 
• Ensuring tests were carried out in line with Australian Standards and Supplements.

Value Add

The client initially believed many of the poles would need replacing or reinforcing. However, after investigation, Balpara determined that eight of the nine poles would be able to structurally support additional loading of electrical cables. This saved significant time and money for our client. 

Relevant Accreditation/Quality Standards

All work was performed based on Australian Standards and Supplements AS4100-2020, AS1170.2-2011, AS1798-2014 and AS3600-2018, and poles were assessed by a Certificate II qualified Asset Inspector. This project was undertaken adhering to all VESI training requirements and best practice surveying techniques. 

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