Clotan Steel is supplying a range of clamps designed for use with the Craft-Lock® roofing profile, to secure photovoltaic systems to any existing or new roof.
According to Danie Joubert from Clotan Steel, the demand for photovoltaic systems means there is a growing market for clamps that will anchor these systems onto the roof without damaging the roofing materials.
Joubert points out that more industrial and residential electricity consumers are converting to renewable sources of electricity to cut their energy costs.
Joubert says the constructional design of the Craft-Lock® roof profile offers an optimal basis for the installation of photovoltaic systems. In both cases, the modules are attached by means of the RTP S5 mini-clamps and Reehfalz 38 S5 clamps.
“As a result, no holes are drilled in the roofing material, which prevents corrosion or leaks from developing. Moreover, no drilling chips are left behind on the roof shell, so there is no danger of damaging the surface coating either,” Joubert says.
The S5 clamp is supplied with a photovoltaic kit that includes a module breaker plate. The panels are laid onto the breaker plate and then attached using the clamp.
“This is an extremely rational way to install the photovoltaic panels,” Joubert says, adding that a new floating installation system with short rails – that also uses the S5 clamp – is currently being developed.
“The new system allows for an extremely flexible modular arrangement so that any panel length can be incorporated. In fact, it’s possible to have complete coverage of the roofing surface using this system,” Joubert added.
Clotan Steel guarantees the mounting systems that it supplies and also promises that they will be delivered to the site on time so that the final work – such as roof capping – can be carried out while the photovoltaic panels are being installed.
“This improves overall efficiency and completes any installation much more quickly,” Joubert says.
Clotan Steel has tested the holding force of the S5 and RTP mini-clamp on the Craft-Lock® profile and these tests have confirmed that the clamp has a holding force that is among the best available on the market today.
However, the company points out that in order to convey the maximum force, the patented grub screws must be tightened to a torque of 17 Newton metres.
Depending on the type of application, the designer, engineer or architect must ensure that the forces acting on the clamp are diverted into the supporting roof or base structures so that the load can be distributed correctly.
“If there is any doubt about the structural capacity of the roof to support the load imposed by the installation of the photovoltaic panels, a stress analysis test should be conducted to determine what the overall load is and how best to absorb it,” Joubert says.
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