Clearly defined standards

At WSM, quality is neither a coincidence nor a mere promise. With its roots in sound craftsmanship, our manufacturing is subject to modern and comprehensive quality management. In addition to ISO-9001:2015, WSM has a variety of other certifications and approvals. We also select our suppliers according to strict quality criteria. Meticulous incoming goods inspections and prudent stock warehousing also ensure that we consistently meet our high standards. This guarantees not only our high quality, but also the safety, stability, durability and lasting value of each of our products.

The delivery and assembly of our products and systems is just as quality-conscious as their manufacture; both deploying our own crane trucks and our own trained specialist personnel, as well as in cooperation with proven, local forwarding companies. We take care of everything. We reliably and seamlessly record all our customers' wishes and instructions with our call system. This guarantees that nothing is left undone, and we gain important information that enables us to continuously improve our products and the service we provide to our customers.

WSM – quality that pays off. Our customers confirm this again and again.

WSM – Walter Solbach Metallbau GmbH

TÜV ISO 9001:2015

For many years, WSM has applied certification based on the international standard ISO 9001. It forms the objective foundation for our continuous improvement process and ensures independently audited and standardised quality assurance. As a customer, you can always rely on the fact that our processes are traceable from A – Z and that the quality of our products is invariably spot on.

WSM – Walter Solbach Metallbau GmbH

Welding certificate DIN EN 1090

Our high production quality is also ensured by the fact that we regularly inspect and document all welding work on load-bearing steel structures. We are also certified for compliance with the specifications for corrosion protection, cutting work, punching and shaping, mechanical joining and dimensioning. Anything manufactured with such care simply lasts longer. And that pays for itself, even after years of use.

WSM – Walter Solbach Metallbau GmbH


Business is a matter of trust. That's why we offer our customers from industry and the public sector financial solidity. We have this certified by Creditreform, Germany's leading provider of business information. In addition to impeccable business conduct, our customers can also expect a positive outlook for the future.

WSM – Walter Solbach Metallbau GmbH


Public contracting authorities receive a list of those companies that are prequalified for public procurement procedures and thus fulfil the suitability requirements set out in the VOB/A (German Construction Tendering and Contract Ordinance: part A). Additional contract-independent verification of the proof of suitability significantly reduces the effort and cost of investments.

Mobile room systems, shelter systems

Type statics

Even if no independent static test is required, it´s still good to know that all our bus/tram/train stop waiting rooms, shelters and mobile room systems are meticulously manufactured and tested. Many variants of our "Cologne" and "Mannheim" shelter systems even have a general type test and are thus pretested for their high-standard stability and durability. A recalculation of the statics on site is therefore not necessary. That is a plus that saves our customers a lot of time and money.

WSM – Walter Solbach Metallbau GmbH

Hot dip galvanising pursuant DIN

Our metal parts go through fire for you. Hot-dip galvanising is a standardised process regulated by DIN EN ISO 1461. In this process, raw material or already processed metal workpieces are individually immersed in a bath after prior treatment according to firmly defined specifications. The immersion process also covers weld seams, interior surfaces and hard-to-reach areas. This means that rust doesn't stand a chance, and what has been manufactured in this way will also withstand any weather, always.

WSM – Walter Solbach Metallbau GmbH

The ok-power seal of approval

Environmentally friendly purchasing is becoming increasingly important to our customers… and that requires that the electricity we use comes from clean energy sources. The ok-power seal certifies that our electricity tariff is guaranteed to contribute to the expansion of renewable energies and their integration into the electricity supply system. The electricity we use comes 100 percent from renewable sources. Certification is based on strict and uniform criteria which we are happy to fulfil for you.

WSM – Walter Solbach Metallbau GmbH

Avoiding waste and conserving resources together

WSM contributes to recovering valuable raw materials, conserving natural resources and protecting climate.

We have been using dry ice for pre-cleaning in the paint shop since 2009, with which we remove production-related impurities particularly thoroughly and in an environmentally friendly manner. The subsequent priming and wet coating with 2-component single-coat paint is low-emission and achieves C3 m quality as the standard for abrasion and corrosion resistance. The energy required for drying is recovered.

We also take care of the environment with our packaging by using recyclable materials and cooperating with an experienced recycling partner.

WSM – Walter Solbach Metallbau GmbH

100% climate neutral parcel shipping

You can't do without it, but even the parcel shipping at WSM is as environmentally friendly as possible. This is ensured by our active participation in the GLS KlimaProtect program. Our parcel shipping is handled climate-neutrally via General Logistics Systems Germany GmbH & Co. OHG.

All climate-damaging greenhouse gas emissions that occur during the transport of our goods shipments are offset by investments in an externally certified forest protection and reforestation project (according to VCS/CCB standard). Furthermore, GLS Germany consistently invests in the further reduction and avoidance of CO2 emissions as part of GLS KlimaProtect.

WSM – Walter Solbach Metallbau GmbH

Sustainable Development Goals

Sustainable management is a key point of discussion in many companies. There are already numerous standards for use in operations. The Sustainable Development Goals (SDGs) adopted by the global community in 2015, are becoming increasingly important as a reference framework. The BAUM association (Federal German Working Group for Environmentally Conscious Management) has developed an offer that helps companies understand and use the SDGs. WSM has undergone the sustainability check itself, helping to create a model for and insight into achieving the SDGs.

WSM – Walter Solbach Metallbau GmbH

CE marking, DIN standards

Das CE-Kennzeichen gewährleistet sichere Produkte durch die Dokumentation der Einhaltung gesetzlicher Mindestanforderungen innerhalb der EU. CE-Kennzeichnung und DIN-Normen garantieren die Betriebs- und Handhabungssicherheit unserer Produkte. Bei stationären Fahrradparksystemen von WSM wird die DIN 79008 mit ihren hohen Anforderungen an Sicherheit,  Umweltfreundlichkeit, Komfort und Sicherheit beachtet.

Information and display systems

Proof of flame retardancy pursuant DIN 4102-1

We leave no stone unturned when it comes to our information and display systems; regardless of whether they are used for advertising purposes or to provide information about fire safety precautions. Many of our display cases are available with certified flame resistance. This means that the requirements for building material class B1 are fulfilled.

Information and display systems

ENEC certification and high IP protection classes

For illuminated showcases and displays, legal standards must be met to prevent electric shocks, short circuits and cable fires. This is ensured throughout the EU by ENEC certification and by high IP protection classes. You will of course find the relevant information on our products.