GM Toproll® 15/24 vs Wind Load

By incorporating wind loads into the design process early on, you end up with not only an aesthetically pleasing solution, but also a structure that operates smoothly over time, closes precisely, and remains safe in the long term.

GM TOPROLL® 15/24 was developed for precisely such situations: a top-hung, frameless all-glass sliding system that truly shines where standard solutions reach their limits—under high weather and wind loads, with large panels, and particularly heavy glass.

Wind load is the force with which wind acts on a surface of a building. It is important to note that wind does not merely “push” but also “pulls” depending on the airflow: wind suction occurs particularly at edges, corners, and in peripheral areas. For design purposes, wind loads are typically determined according to the Eurocode (EN 1991-1-4, Wind Loads), including the relevant national specifications. The decisive factors here are the basic wind speed of the region, the terrain category (open terrain behaves differently than densely built-up areas), the building height, and the shape and detailed geometry of the structure. Taken together, these factors result in site-specific loads that cannot be reliably estimated using a “flat rate,” especially in exposed locations or at greater heights.

GM TOPROLL® 15/24 is particularly suitable for use when the sliding system can be mounted to the ceiling and the ceiling structure is capable of supporting the weight. This requirement often offers a decisive advantage in commercial construction: the loads are transferred in a controlled manner to the load-bearing substrate, while the architecture retains the desired sense of lightness and transparency. As a frameless all-glass sliding system, GM TOPROLL® 15/24 is designed for glass thicknesses up to VSG/ESG 24.4 and engineered to handle very high element weights, even up to 200 kg per glass element. This opens up possibilities for projects where, due to wind loads, component heights, or comfort requirements, more substantial glass combinations are structurally advisable or necessary.

Especially for buildings exposed to high weather and wind loads, this margin in the system design is a key advantage: Instead of planning at the limit, a system is chosen that is structurally engineered for high stress, thereby ensuring stability, smooth operation, and reliable performance throughout its service life.

For overhead sliding systems, securing the glass panels is a key safety consideration. In practice, relying solely on adhesive bonding or clamping is insufficient, particularly for heavy panels and under repeated load cycles. GM TOPROLL® 15/24 therefore incorporates multiple mechanical locking pins as an additional safety measure. This principle has been substantiated by long-term studies and tests; in pull-out tests, the required values for glazing secured by locking bolts were significantly exceeded. For designers, this is a strong selling point in tenders and presentations; for installers, it is a clear design principle with transparent logic: redundancy, defined security, and long-term operational safety.

During the planning phase, it is worth considering GM TOPROLL® 15/24 whenever wind loads, building height, perimeter areas, or exposed locations are factors, and whenever heavy glass elements are required for stability, comfort, or to meet code requirements. Regarding installation: Product installation is an integral part of the system’s performance. Installation, height adjustment, ceiling mounting, and the full implementation of mechanical securing are the key factors that, when working together, define the subsequent smooth operation, closing behavior, and durability.