MOUNTING SYSTEMS base rail EW XL – length 2287 mm

The Mounting Systems EW XL base rail with a length of 2287 mm is the load-bearing base element for aerodynamic flat roof mounting systems in east-west orientation (EW). The "XL" version is specially optimised for accommodating large-format solar modules (multi-cell modules), which have a greater width or length than standard modules.

This rail is placed directly on the roof membrane (using building protection mats) and serves as a stable base for the front and rear module supports. Due to its precise manufacturing and integrated mounting points, it enables rapid, modular assembly of the entire rail system without roof penetration.

Highlights at a glance

• Extra-long (XL): With a length of 2287 mm, the rail offers ample space for modern, large surface PV modules and the necessary clearances for aerodynamics.
• High static rigidity: The special aluminium profile is designed for high mechanical loads, to safely absorb wind and snow loads.
• Tool-optimised: Features prefabricated slots and hole patterns that allow precise positioning of the module supports and connectors.
• Ballast-optimised: The geometry of the base rail allows for easy and secure placement of ballast stones to weigh down the system.
• Weather-resistant aluminium: Permanent protection against corrosion, even with standing moisture on flat roofs.
• System integrity: Perfectly matched to the EW components from Mounting Systems for a form-fit and stable connection.

Areas of application

The XL base rail is the backbone for large-scale flat roof projects:

• East-west elevations (10°/15°)
  • Coupling two modules "back to back" for optimal use of roof space with even energy production throughout the day.
• Industrial & commercial roofs
  • Used on bitumen, foil or gravel roofs, where a ballasted solution without damaging the roof membrane is required.
• Large format modules
  • Especially for PV modules with a width over 1.10 m or other custom dimensions that require a longer base.

Installation & safety instructions

• Building protection mats (PADs)
  • Always place suitable building protection mats beneath the base rail to protect the roof membrane from mechanical damage and plasticiser migration.
• Alignment
  • Ensure the base rails are aligned exactly parallel to each other to avoid tension in the module field and installation problems with the connectors.
• Ballasting according to statics
  • The rail serves as a carrier for the ballast. The exact position and quantity of stones must be taken from the project-specific structural plan.

Properties

FAQs on the EW XL 2287 mm base rail

Why is the rail 2287 mm long?

For double module structure.

• In an east-west system, two modules are mounted opposite to each other. The length of 2287 mm covers the base area of both modules, including the necessary clearances for ridge coupling and aerodynamic optimisation.

Can I also use this rail for a purely south-facing orientation?

Conditionally.

• Basically, this profile is perforated for Mounting Systems' EW system. For south-facing systems, there are often specific base rails with different lengths and hole patterns (e.g. S systems).

How are the rails connected to each other?

Via cross-connecting rails.

• The stability of the field is achieved by screwing the base rails to cross connectors. This creates a continuous grid that jointly absorbs wind loads.

Is the aluminium walkable?

Yes, during installation.

• The rail is stable enough to be carefully walked on during installation. Nevertheless, point loads directly on the roof membrane should be avoided.