Ask Your Mates Open Forum

Proavtive maintenance of lighting structures at sports fields

  • 1.  Proavtive maintenance of lighting structures at sports fields

    Posted 30 July 2019 22:30
    Hi,

    Hope you all are doing well.

    We have found one group of assets here in Moreland for which we do not seem to have regular proactive inspections.
         • Lighting structures at sports fields

    There are close to 400 of these structures, some of which would be over 10m tall. As all/most of these structures are very new, the need to inspect them is questionable(?). However, if regular inspections are required, do you have any suggestions about any suitable method (a camera mounted drone or similar) to follow or could you please share what you do to look after similar type of assets in you LGA?

    We need to determine
         1. Are proactive inspections required?
         2. What is the frequency of these inspections?
         3. An appropriate method for inspecting the tall structures?

    Please feel free to share your experience or provide valuable comments and enlighten us. We will highly appreciate your contribution.

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    Chiranjit Saha
    Open Space and Facilities Asset Planner
    Moreland City Council
    Melbourne, Victoria
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  • 2.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 31 July 2019 23:48
    Hi Chiranjit

    Regular inspections are a must. Talk to Powercor / City power or VicRoads about their pole inspection regime. I wouldn't be too worried about what up the top - it's the base that's likely to fail due to corrosion or wood rot.

    Cheers

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    Ricky Luke
    Asset Management Coordinator
    Glenelg Shire Council
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  • 3.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 04 August 2019 17:46
    Hi Chiranjit,
    Ricky makes a good point about the base, your inspection regime needs to be clear about what inspectors should see at the base of the poles as well.  Over time it can be possible for other stakeholders at sporting facilities to make changes which would seem to be benign at the time but could be highly damaging.
    I recall an example where the foundation, base plate and bolts for a lighting pole were buried under some fill instead of being kept uncovered and serious corrosion was revealed when one of the lighting poles fell over. Inspection revealed all the poles had received the same treatment and were severely corroded. The courts had to be closed for several weeks mid-season while lighting was replaced.
    The base of the poles had been buried for so long the inspectors thought it was supposed to be like that.
    It was very lucky that the pole didn't fall during a game.
    Thanks

    Sally Thompson
    Strategic Infrastructure Projects Engineer
    Blue Mountains City Council
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  • 4.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 01 August 2019 20:37
    Edited by Declan Simons 01 August 2019 20:45
    ​Hi Chiranjit,

    We recently started to undertake a program of inspecting POS lighting and electrical structures in by engaging an electrical engineer and structural engineer. Proactive inspections are required as Ricky mentioned focusing mainly on testing the structural integrity the base and footing of the pole. We are aiming for an inspection after the first 10 years, then every 5 years. The light fixtures at the top are normally inspected through reactive lamp maintenance by an electrician or can be done with our drone as required but almost all of the risk is the base of the pole.

    Declan Simons
    Asset Technical Officer
    City of Armadale


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  • 5.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 04 August 2019 17:46

    a quick 400 assets @ $168 per pole =$67,200


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  • 6.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 01 August 2019 20:38
    Hi Chiranjit, you might want to talk to RevoGroup (https://www.linkedin.com/company/revogroupltd/), they work with electric lines companies and councils to develop inspection regimes for steel, concrete and wooden poles.

    Tod Trotman
    Asset Manager
    Network Waitaki
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  • 7.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 04 August 2019 17:45
    Hi Chiranjit,
    Ricky is on the money here. Visual inspections at the top, in depth inspections for corrosion at the base, 4 yearly intervals for good poles and decrease the interval as the pole degrades.
    I am from Revo Group, that Tod mentioned (Thanks Tod).
    We inspect direct buried poles with EMAT Ultrasonics to detect corrosion at and below groundline, all the way to the base of the pole without excavation. We inspect flange based poles using EMAT Ultrasonic thickness gauges to detect loss of wall thickness at the base above the flange.
    We also use our Structural Lines database to record results, GPS and photos, calculate residual strengths and tip loading etc.
    Happy to discuss further and can also suggest a few other council asset managers you could speak to that use our services.

    Regards,

    Chris Mingay
    Revo Group
    0418 269601
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  • 8.  RE: Proavtive maintenance of lighting structures at sports fields

    Posted 05 August 2019 18:04

    Hi Chiranjit,

    Short answer is yes, definitely go the proactive approach.

    Pole base corrosion seems to be a sleeping beast for all of us I feel as we too had a sports field pole unexpectedly fall over from corrosion at the base. This initiated for us a full electrical audit of all sports field, court and reserves lighting. First round of audits was to not only identify any other poles with structural integrity issues but also to identify any non-compliance with regards to the electrical installations, lighting design and lighting tower structural installations. It revealed a handful of poles with wall thickness falling below 50% so we had them removed immediately and eventually replaced, and all other non-compliance issues were either passed over to maintenance as minor reactive or added to our 10 year CAPEX plan for future projects.
    Our audit scope consisted of the following...

    • Determine the point of attachment location from the power utility.
    • Identify if the existing lot has multiple points of supply.
    • Determine the estimated supply capacity provided by the utility.
    • Review of the existing site main switchboard to determine condition and compliance with current edition of the WAER and AS3000:2007.
    • Review of the existing switchboard / distribution boards to determine condition and compliance with current edition of the WAER and AS3000:2007.
    • Review of the existing electrical installations within the lighting towers for compliance with current edition of AS3000:2007.
    • Review the existing external sports lighting installations for compliance with AS2560 with respect to the particular sports undertaken at the particular locations based on training and club competition lighting.
    • Maximum demand calculations for the existing site.
    • Structural assessment of the existing lighting towers for compliance with current standards and wind loading.
    • Preparation of a detailed report to include all non-compliance items, recommendations and probable order of costs.
    • Provide where existing lighting arrangements cannot be reasonably upgraded to Australian Standards, then a concept design and estimate for new lighting installations.

    Happy to email you a copy of a report from one of our sports fields if you like to show you what we found?

    We also developed a reinspection schedule with a traffic light system to track when assets are due each year depending on their condition and risk assessment from the reports, not just going by their age.

    We are now carrying out pole corrosion inspections on our electrical power supply poles.

    Feel free to call if you need anything further explained.

    Regards



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    Graeme Clarke
    Asset Inspector
    City of Kalamunda
    Perth WA
    M 0457520140
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