Installation of photovoltaic cable trays on corrugated steel roof tiles

Photovoltaic cable trays on corrugated steel roofs are installed using specialized mounting systems with hanger bolts or brackets that ensure structural stability and watertight sealing.Mounting Syste...

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Installation of photovoltaic cable trays on corrugated steel roof tiles

Photovoltaic cable trays on corrugated steel roofs are installed using specialized mounting systems with hanger bolts or brackets that ensure structural stability and watertight sealing.Mounting System SelectionFor corrugated steel roofs, it is essential to use mounting systems designed for the roof profile. Systems like the ClickFit EVO Corrugated Roof or NOVA Corrugated Roof Mounting System are specifically engineered for corrugated sheets, distributing pressure evenly across the valleys and reducing point loads, which protects the roof from damage . These systems typically include pre-assembled brackets or hanger bolts that attach directly to the roof purlins.Attachment MethodsHanger Bolts: These are threaded bolts that penetrate the corrugated steel and secure into the wooden or metal substructure beneath. They often come with adapter plates to attach rails or cable trays and are available in various lengths and diameters (e.g., M10/M12) to accommodate different roof thicknesses .Pre-Assembled Brackets: Some systems provide brackets that fit the corrugated profile and include EPDM grommets or rubber seals to maintain a watertight connection. These brackets simplify installation and reduce the risk of leaks .Rail Systems: Aluminum or steel rails are mounted on the brackets or hanger bolts, providing a stable base for cable trays and PV modules. Rails should be aligned with the roof purlins to ensure proper load distribution .Waterproofing and SealingMaintaining roof integrity is critical. Use EPDM rubber grommets, seals, or pre-installed washers at all penetration points to prevent water ingress. Systems like NOVA and ClickFit EVO are designed to fit precisely around the corrugation valleys, ensuring a watertight seal while allowing for thermal expansion .Installation StepsInspect the Roof: Verify the condition of the corrugated steel and locate purlins for secure attachment.Mark Mounting Points: Align brackets or hanger bolts with purlins and mark positions for drilling.Install Hanger Bolts or Brackets: Secure bolts or brackets with appropriate torque, ensuring even pressure and proper sealing.Attach Rails: Connect aluminum or steel rails to the brackets, ensuring they are level and aligned.Mount Cable Trays: Secure cable trays to the rails, maintaining proper spacing and support for PV cables.Advantages of Specialized SystemsReduced installation time due to pre-assembled components.Enhanced durability with corrosion-resistant alloys.Watertight protection with EPDM seals.Height adjustability for leveling on uneven corrugated profiles . Using these methods ensures a safe, durable, and efficient installation of photovoltaic cable trays on corrugated steel roof tiles.
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