Dimensions of cable tray supports inside vertical shafts

Vertical shaft cable tray supports typically use standard lengths of 2000 mm or 3000 mm, with material and spacing selected based on load, cable type, and installation environment.Standard Lengths and MaterialsVertical cable tray supports are generally available in standard lengths of 2000 mm and 3000 mm, with custom lengths possible upon request in 1 mm increments for specific applications . The supports are commonly made from zinc-plated sheet steel or stainless steel, chosen according to environmental conditions, corrosion resistance requirements, and mechanical load .Support Spacing and Load ConsiderationsSupport spacing for vertical shafts depends on the weight of the cables and the type of tray (ladder, solid-bottom, or mesh). Typical spacing is determined by manufacturer load tables and standards such as DIN EN 61537 .For heavy-duty industrial applications, supports may be placed closer together to prevent deflection and ensure structural integrity. Light instrumentation or control cables may allow wider spacing .Upstream strain relief at fixed points may require longer support trays to accommodate cable entry and reduce stress on the tray .Width and ClearanceThe inner channel width of the support should be 4–6 mm larger than the cable tray width to allow smooth installation and movement .Adequate clearance must be maintained for thermal expansion, cable bending radius, and maintenance access .Installation Best PracticesUse continuous slide supports or guide channels for one-sided arrangements to ensure smooth cable movement in vertical shafts .Ensure supports are properly anchored to the building structure using standardized fasteners; external fastening elements like screw ties are used to secure the tray but are not part of the support system itself .Consider corrosion protection and environmental factors, especially in humid or chemically aggressive environments, to maintain long-term durability .SummaryVertical shaft cable tray supports are designed with standard lengths of 2000 mm or 3000 mm, constructed from zinc-plated or stainless steel, and spaced according to load, cable type, and safety standards. Proper width clearance, strain relief, and anchoring are essential for safe and reliable vertical cable tray installations .