TRAPEZOIDAL PV PROFILE

The Trapezoidal PV Profile is the primary full-length solar mounting rail in the ULAMEX trapezoidal roof photovoltaic mounting system. Available in four profile heights — 40, 60, 70, and 100 mm — and a generous 114 mm width, this aluminum rail bridges the gap between the raised ribs of trapezoidal sheet metal roofs, providing a continuous, level mounting surface for solar panels across the entire roof span. Each height variant corresponds to specific trapezoidal sheet rib dimensions, ensuring a precise fit without shimming, packing, or custom fabrication. Extruded from EN AW-6060 T6 aluminum alloy in a standard length of 6,210 mm (6.21 m), this profile is the go-to solution for large-area commercial and industrial solar installations on metal roofs throughout Europe. ULAMEX supplies the full range at B2B wholesale conditions with pallet and full-truck delivery from stock in Poland.

Technical Specifications

The Trapezoidal PV Profile is manufactured from EN AW-6060 T6 (AlMgSi alloy in T6 temper), providing a minimum tensile strength of 190 MPa, minimum yield strength of 150 MPa, and a minimum elongation of 8%. The T6 heat treatment delivers the highest mechanical properties available in the 6060 alloy series, ensuring that the profile maintains its structural integrity under the combined dead load of solar panels, dynamic wind forces, and thermal cycling over a 25+ year service life.

The 114 mm width is a key engineering feature. This broad bearing surface distributes module loads across a wider contact area on the trapezoidal sheet rib, reducing the peak stress on any single point of the roof structure. Compared to narrower bridge profiles, the 114 mm width provides greater stability against lateral forces and ensures that the solar panel clamps have ample positioning space along the rail — critical when modules must be shifted slightly to account for roof irregularities or to optimize row spacing.

The dual-channel upper rail is designed for maximum fastener flexibility. It accepts M8 sliding inlet nuts with ball retention for tool-free pre-positioning of clamps along the rail, as well as conventional M8 hex fasteners (DIN 912) with square nuts (DIN 557). This means installers can choose whichever attachment method best suits their workflow — pre-loaded sliding nuts for high-volume production-line installation, or conventional hardware for smaller projects and adjustments.

Channel and Fastening System

The Trapezoidal PV Profile features a dual-purpose fastening system that separates roof attachment from panel attachment. Roof attachment is accomplished using 6.0×25 bi-metal self-drilling screws and 5.5×25 EJ self-drilling screws from the ULAMEX fasteners range. These screws penetrate the aluminum profile and the steel trapezoidal sheet simultaneously, with the bi-metal construction preventing galvanic corrosion at the aluminum-steel interface. Screw placement follows the trapezoidal sheet rib pattern, with fastening points at regular intervals along the profile length.

Panel attachment uses the dual-channel upper rail. The first method employs M8 sliding inlet nuts with spring-ball retention — the nut is inserted into the channel and slides freely until positioned under the clamp bolt, where the ball retention holds it in place during tightening. The second method uses standard M8 hex socket cap screws (DIN 912) with square nuts (DIN 557), inserted from the end of the rail or through the channel opening. Both methods are fully compatible with all ULAMEX aluminum mid-clamps and end-clamps.

This dual-method channel design gives professional installers the flexibility to optimize their workflow. On large-area roofs where hundreds of clamp points must be set, pre-loaded sliding nuts significantly accelerate installation. On smaller sections or where clamps need repositioning, conventional hex-and-square-nut hardware provides straightforward adjustability.

Installation Applications

The full-length Trapezoidal PV Profile is designed for continuous rail runs where solar panels are mounted in long rows parallel to the roof ridge on trapezoidal sheet metal roofs. Typical applications include:

• Industrial warehouse roofs — large flat or low-slope trapezoidal roofs on production halls, logistics centres, and distribution warehouses. The 6.21 m length minimizes splice joints across wide roof spans, maintaining structural continuity and reducing installation labour. Heights of 40–100 mm accommodate the full range of industrial trapezoidal sheet profiles.
• Commercial building roofs — office complexes, retail buildings, and mixed-use developments with trapezoidal metal cladding. The broad 114 mm width distributes loads evenly across the sheet rib, suitable for both portrait and landscape module orientations.
• Agricultural and livestock buildings — barns, storage facilities, and agricultural halls where trapezoidal sheeting is the predominant roofing material. The aluminum construction adds minimal dead load to lightweight roof structures.
• Retrofit solar installations — adding PV capacity to existing metal-clad buildings. The direct-to-sheet fastening system avoids the need for structural modifications to the underlying purlins or rafters, making retrofit projects faster and more cost-effective.
• East-west mounting configurations — where two rows of panels face opposite directions on a flat or low-slope roof. The continuous rail provides consistent support across both orientations, with clamp positions easily adjusted along the full rail length.

For roofs with 25 mm rib heights specifically, see the dedicated Trapezoidal PV Profile H25. For point-based mounting where continuous rails are not required, the Trapezoidal Bridge segments with EPDM bonding offer an alternative approach.

Why Choose This Profile

The Trapezoidal PV Profile is the workhorse of metal-roof solar installations. Its combination of four height options, 114 mm width, and 6.21 m length makes it the most versatile continuous-rail solution for trapezoidal roofs in the ULAMEX range. Compared to the alternatives:

• The H25 low-profile bridge (66 mm wide, 24.5 mm high) is limited to 25 mm rib heights and is narrower, offering less clamp positioning flexibility.
• The Trapezoidal Bridge segments (300–400 mm short pieces with EPDM) provide point-based mounting for low-density panel layouts but require more alignment effort and do not create a continuous rail run.
• The full-length Trapezoidal PV Profile delivers continuous panel support across the entire roof width, maximizing the number of modules per rail and enabling stepless clamp positioning anywhere along the 6.21 m length.

For large commercial and industrial rooftops where maximizing panel density and minimizing installation time are the primary objectives, the full-length Trapezoidal PV Profile is the clear choice. The four height options ensure compatibility with virtually every trapezoidal sheet profile on the European market, from 40 mm ribs on lightweight cladding to 100 mm ribs on heavy-duty industrial roofing.

Standards and Quality Assurance

All Trapezoidal PV Profiles are extruded from EN AW-6060 T6 aluminum in accordance with EN 755-2 (mechanical properties for extruded profiles) and EN 573-3 (chemical composition). The T6 temper provides consistent performance: minimum tensile strength 190 MPa, minimum yield strength 150 MPa, Brinell hardness approximately 75 HB. The natural aluminum oxide layer delivers corrosion protection suitable for outdoor exposure in categories C1 to C3 per EN ISO 9223 without additional coatings. The bi-metal fastening screws used for trapezoidal sheet attachment are engineered to prevent galvanic corrosion between aluminum and galvanized steel. ULAMEX holds EN 1090 certification for structural aluminum, with full material traceability on every profile delivered.

Frequently Asked Questions

How do I choose the correct profile height for my trapezoidal roof?

Measure the rib height of your trapezoidal sheet — the vertical distance from the trough (valley) to the top of the raised rib. Select the Trapezoidal PV Profile height that matches this measurement: 40, 60, 70, or 100 mm. A correct height match ensures a flush, stable fit with optimal load transfer to the roof structure. If your rib height is 25 mm, use the dedicated H25 profile instead.

Can I splice two profiles together for longer roof spans?

Yes. For roofs wider than 6.21 m, profiles can be spliced end-to-end using aluminum splice connectors that slide into the profile channel. Each splice point should be positioned at or near a trapezoidal sheet rib for structural support. The 6.21 m standard length is designed to cover most common commercial roof widths with minimal or no splicing required.

What is the difference between this profile and the Trapezoidal Bridge?

The full-length Trapezoidal PV Profile (6.21 m) creates a continuous rail across the roof width, supporting panels at any position along its length. The Trapezoidal Bridge consists of short segments (300–400 mm) bonded to the roof with EPDM tape, providing individual support points at each clamp location. Choose the full-length profile for dense panel arrays where continuous rail support is needed; choose Bridge segments for sparse layouts or where non-penetrating EPDM bonding is preferred.

Is this profile compatible with landscape and portrait module orientations?

Yes. The 114 mm wide upper channel provides ample room for positioning mid-clamps and end-clamps in both landscape (horizontal) and portrait (vertical) module configurations. Clamp positions can be adjusted freely along the entire rail length using the M8 sliding nut or conventional hex-and-square-nut hardware.