Rail Systems mounted on S-5!® Clamps

PV-Montage mit Schienen

Using S-5! Clamps, rail systems can be simply and securely fastened to seams without penetrating them. The S-5!-Mini-Clamps are usually sufficient for this purpose. These can then be used to mount solar and photo-voltaic modules as well as air conditioners, machines, etc. onto the standing seam metal roof.

All components in Germany related to fixing solar products for PV installations needs a German approval by the DIBt (German Center of Competence for Civil Engineering – Authority of the German Government). The S-5-Z- and S-5-E-Clamps families have the national technical approval by the DIBt No: Z-14.4-719.

Typische C-Schiene montiert auf Z-Mini für Rundfalzdächer
Z-Mini under a C-rail

The Mini-Clamps with a M8-threaded top hole and M8-bolt can be use for C- and U-rails as well for easy installations with adapter plates.

Schiene mit unterseitigem Schraubkanal auf E-Mini-FL
Rail with bottom channel fixed on the E-Mini-FL

The S-5! E- and Z-Mini-FL Clamps (with flange with a 18x11mm hole) are the correct choice for rails with the screw channel located on the underside. The hammer-head bolts can be fixed quickly and securely through the slot on the flange.

S-5! Klemmen mit Adapter

For mounting rails with bottom or side screw channels the S-5! Clamps without flange can be easily and cost-effectively combined with various adapter plates.

Examples of Applications:

Z-Mini unter C-Schiene
Z-Mini-FL-PV-Althengstett
Rail systems mounted with Z-Mini and Z-Mini-FL clamps
E-Mini-Schiene
E-Mini-Flansch-Schiene
Rail systems mounted with E-Mini and E-Mini-FL clamps
R465-Mini Solarworld
Rail system mounted on
R465-Mini-Clamps
S-5-Mini-Adapt Ergoldsbach
Track system on
S-Mini-Clamp with adapter plate

Please note:

The following suggestions assume that determination has been made that the roof to which the S-5! clamps will be attached is structurally adequate. Any loads imposed on the S-5! clamps will be transferred to the panels. Panel seams must have sufficient flexural strength to carry these loads. Panels must also be adequately attached to the building structure, and the structure must be sufficient to carry these loads. The makers of S-5! clamps make no representations with respect to these variables. It is the responsibility of the user to verify this information, or seek assistance from a qualified design professional, if necessary.
The key to frequency and spacing of attachment points for PV is to distribute loads to the metal standing seam panels in a manner that is consistent with the intended distribution of loads from the roof panels into the building structure. With very few exceptions, the attachment of a single S-5! clamp (even the “Mini”) to the seam will be stronger than a single point of attachment of the seam to the building structure. Hence the “weak link” is not the S-5! clamp, but the attachment clips that hold the metal panels to the building structure, or the beam strength of the roof panel seam, itself.
The most conservative approach to the spacing/frequency of PV attachment to the roof is to determine the spacing/frequency of the roof’s attachment to the building structure; then duplicate it at minimum. Determining panel attachment spacing in one axis is very simple: Standing seam panels’ attachment will be made using concealed hold-down clips within the seam area of the panel. So, in that axis, the clip spacing is the same as the seam spacing. The location of the clips along the seam (in the other axis) can be determined by a) consultation with the roof system manufacturer or installer, b) checking from the underside or, c) close examination from the topside along the seam. There will usually be a slight, but detectable, deformation of the seam at the clip location visible from the roof’s topside. Many standing seam roofing systems are installed on “pre-engineered steel” buildings. The attachment spacing in that industry is typically 5’-0” and is readily apparent by inspecting the structural purlins to which the panel clips are attached from the roof underside (interior of the building).
If the panel clips are spaced, for instance, 5′-0″ on center along the seam, then use the 5′-0″ dimension as a maximum spacing for the S-5! clamps. (S-5! clamps may also be spaced at closer centers, but not wider.) When modules are direct attached (without racking) in the landscape orientation, this spacing dimension is dictated by the smallest dimension of the PV frame. Using the roof panel clip spacing as a maximum spacing template for S-5! clamps is a sound practice, whether the PV modules are attached direct to S-5!, or to a racking system, which is in turn attached to the S-5! (and panel seams). To evenly distribute loads, it is also necessary that each seam be involved in the finished assembly. Thus, every time a seam is traversed, it should be attached. Such an attachment scheme should evenly distribute wind loads into the building structure through the panels and their attachment, as was intended in the original roof construction assembly.
Please note these are only suggestions. Wind dynamics are complex, and S-5! advises review of the planned PV frame attachment design by a qualified professional who understands wind effects and metal roof design and construction. In certain solar installations, a design professional may determine that seams can be skipped as points of attachment, but this determination must be made on a job-specific basis.
The respective installation instructions must always be observed. However, the respective installation instructions do not release the executing company from the obligation to clarify in advance the possible uses and applications of our products, also in connection with the other materials used, on the individual object. RoofTech GmbH and S-5!® – Metal Roof Innovations Ltd. do not assume any responsibility for assembly and applications.
We assume no liability for errors on the website. Pictures and drawings can represent development stages, which are not available in such a way. The contents, photos and graphics may only be used or passed on after consultation with RoofTech GmbH.
The installation instructions and more information to download under “Information”. Load test results, CAD details, metallurgical compatibilities, specifications and additional information are available on the homepage of S-5!: www.s-5.com.
Open in new tab or direkt download (pdf): RoofTech – S-5! General Notes.
The photographs and drawings herein are for the purpose of illustrating installation, tools and techniques, not system designs. S-5! products are protected by international patents of Metal Roof Innovations Ltd. Link to S-5! Therms of Use
No liability for printing errors. Technical changes subject to modification. All rights reserved.
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