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Structures for Flat Roofs

Welded Structures
Bolted Structures
Ballast Structures
Welded Structures
Bolted Structures
Ballast Structures

DESIGN OPTIONS

Photovoltaic systems for flat roofs are classified based on their installation method. RBT Solar offers three main types: welded, ballasted, and bolted.

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Universal Structures

RBT Solar Production Facility - Aerial View

Design Structures

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Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Mounting profiles (purlins)

  • Made of steel with a Magnelis® coating
  • Designed to carry loads along the entire length of the module

Editorial, lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliquatenim ad minim lorem ipsum dolor sit amen.

Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Mounting profiles (purlins)

  • Made of steel with a Magnelis® coating
  • Designed to carry loads along the entire length of the module

Editorial, lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliquatenim ad minim lorem ipsum dolor sit amen.

Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Full support for the module along the long side

Highest snow load resistance.

Mounting profiles (purlins)

  • Made of steel with a Magnelis® coating
  • Designed to carry loads along the entire length of the module

Usage and Compatibility

Ideal for regions

  • About Heavy Snowfall
  • With strong winds
  • In extreme weather conditions

Available module orientations

  • South (S)
  • East-West (EW)

Compatibility
with structural types

  • Welded Structures (FR-W)
  • Ballast Structures (FR-B)
  • Bolted Structures (FR-S)

Figures 1 and 2

Chart No. 1
Chart No. 2

Usage and Compatibility

Compatibility
with structural types

  • Welded Structures (FR-W)
  • Ballast Structures (FR-B)
  • Bolted Structures (FR-S)

Available layouts

  • Level (H): available for modules up to 2500 mm in length
  • Vertical (V): available for modules up to 1950 mm in length

Design Option

  • Universal Structures (US) – Available Immediately
  • Custom Designs (PS) – Tailored to Individual Needs

MATERIAL TYPE

Steel vs. Aluminum

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What should you choose based on the conditions?

Coastal areas / high chloride levels (e.g., 0–5 km from the sea)

Magnelis® offers better resistance to chlorides and self-sealing of the edges. Aluminum also works if it has a good anode and insulation.

Farms (ammonia, corrosive fumes)

Magnelis® offers better resistance to chlorides and self-sealing of the edges. Aluminum also works if it has a good anode and insulation.

Roofs with low load-bearing capacity (old sheet metal/ETERNIT roofs after renovation)

Magnelis® offers better resistance to chlorides and self-sealing of the edges. Aluminum also works if it has a good anode and insulation.

Areas with high snow and wind loads

Magnelis®/steel – greater rigidity → fewer supports, shorter brackets, simpler structural design.

Projects requiring quick installation and a high degree of flexibility on a complex roof

Aluminum – easy to cut to size and adjust on site, extensive range of accessories

Decision-Making Guidelines for the 1 MW Project

  • Start by assessing the roof's load-bearing capacity and environmental conditions (marine, industrial, high levels of pollution). If the roof's load-bearing capacity is limited → aluminum is the preferred choice.
  • If the roof or surrounding area is a high-corrosion-risk environment and you want lower material CAPEX → Magnelis, but you should factor in the additional ballast and installation costs.
  • If you want quick installation, minimal roof load, and a well-documented, modular solution → aluminum
  • If the project is in a corrosive environment or the material budget is tight and you’re willing to accept a higher weight/assembly cost → Magnelis is a very reliable and cost-effective solution.

In summary

Aluminum – lighter, suitable for roofs with lower load-bearing capacity, more versatile than magnelis; due to its versatility, it is available “off the shelf” from our warehouse

Protection
of the roof sheathing

60%50%

Separation between layers

Steel separated from the roof sheathing—protection against being cut or accidentally
damaged by a car. Aut quo voluptatum molestiae

30%80%

Separation between layers 2

Steel separated from the roof sheathing—protection against being cut or accidentally
damaged by a car. Aut quo voluptatum molestiae

10%50%

Separation between layers 3

Steel separated from the roof sheathing—protection against being cut or accidentally
damaged by a car. Aut quo voluptatum molestiae

RBT Solar Production Facility - Aerial View

Control System for an Installation with Trackers

Leg spacing: standard 5400 mm

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Piling depth: 1500 mm

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Concrete Placement in Challenging Conditions

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Foundations and Piling

Server on the premises

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Full access to system settings

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Server backup battery

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

TCU (Tracker Control Unit)

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

RSU

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

NCU (Network Control Unit)

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Materials Used

Hot-dip galvanized black steel (S355J2H)

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Magnelis®

The MC (Main Controller) central industrial computer manages the entire system, collects data from weather sensors, and coordinates the operation of all trackers. The system operates in real time with a positioning accuracy of ±2°, ensuring that the movement of all rows is synchronized.

Frequently Asked Questions from Installers

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Lorem ipsum dolor ist amte, consectetuer adipiscing eilt. Aenean commodo ligula egget dolor. Aenean massa. With their companions, their ancestors, and the great gods, the mountains will give birth to a ridiculous mouse. The cat quacks, the ultricies are gone, the pellentesque is there, the pretium is what it is, and it’s sem.

Lorem ipsum dolor ist amte, consectetuer adipiscing eilt. Aenean commodo ligula egget dolor. Aenean massa. With their companions, their ancestors, and the great gods, the mountains will give birth to a ridiculous mouse. The cat quacks, the ultricies are gone, the pellentesque is there, the pretium is what it is, and it’s sem.

Lorem ipsum dolor ist amte, consectetuer adipiscing eilt. Aenean commodo ligula egget dolor. Aenean massa. With their companions, their ancestors, and the great gods, the mountains will give birth to a ridiculous mouse. The cat quacks, the ultricies are gone, the pellentesque is there, the pretium is what it is, and it’s sem.