# China Standard Cable Ladder Tray URL: https://www.chinneelectric.com/products-types/cable-ladder-system/china-standard-cable-ladder-tray/ Brand: Chinne Electric ## Summary Chinne Electric China Standard Cable Ladder Tray. A ladder-type cable tray system for power distribution, industrial cable routing and electrical cable management, available in galvanized steel, stainless steel and aluminum.. China Standard Cable Ladder Tray is designed for reliable power cable support in industrial plants, substations, commercial buildings and infrastructure projects. It features strong side rails, profile rungs and matching cable ladder fittings such as ... ## Key facts - Standards: GB/T 23639-2017, JB/T 10216-2013 - Corrosion protection & aesthetics - Fire-resistant, insulated & circuit-safe - Heavy-duty corrosion protection, weather resistance ## FAQ ### What is China Standard Cable Ladder Tray? Chinne Electric China Standard Cable Ladder Tray is engineered for reliable performance in commercial and industrial installations, with documentation aligned to applicable international standards. ### Which standards apply to China Standard Cable Ladder Tray? Refer to the product technical specifications for cited standards such as IEC, GB/T, or JB/T requirements relevant to cable systems and installation practice. ### Where is China Standard Cable Ladder Tray typically used? Typical applications include building electrical systems, industrial plants, infrastructure projects, and MEP installations requiring organized cable routing and long-term maintainability. ### How do I select the right China Standard Cable Ladder Tray specification? Selection should consider load, environment, corrosion protection, fire performance, and installation constraints. Contact Chinne Electric for project-specific guidance. ### Does Chinne Electric provide custom solutions for China Standard Cable Ladder Tray? Chinne Electric supports customized dimensions, finishes, and project documentation for export and compliance requirements. ## Content Technical Specifications The China Standard Cable Ladder Tray comprises longitudinal side rails and transverse profile rungs, forming a rigid ladder-type support structure. Standard manufacturing conforms to GB/T 23639-2017 and JB/T 10216-2013, with the following core parameters: Side rail height: 60 mm, 80 mm, 100 mm, 150 mm, 200 mm Rung spacing: 250 mm (standard); 200 mm, 300 mm optional Material grades: Q235B carbon steel (galvanized), 304 / 316L stainless steel, 6063-T5 aluminum alloy Surface finish (steel): hot-dip galvanized (min. 65 µm per GB/T 13912), electro-galvanized, powder-coated, or pre-galvanized Duty classification: Light (L), Medium (M), Heavy (H), Extra Heavy (E) per load capacity defined in JB/T 10216-2013 Working load range: 50 N/m to 5400 N/m, depending on span and rail configuration Standard length: 2000 mm, 3000 mm, 4000 mm, 6000 mm Width range: 100 mm to 1000 mm Flange profile: I-type, C-type, or box-type as required Operating temperature range: -40°C to +150°C (stainless steel); -20°C to +100°C (galvanized steel with powder coat) Compatible fittings: bends, risers, tees, crosses, reducers, covers, couplers, and splice plates Applications The cable ladder tray system is engineered for structured cable management across four duty environments specified by JB/T 10216-2013. Each classification corresponds to defined load and deflection criteria under a simply supported span of 2000 mm. Light Duty (L): Branch-circuit cable routing in commercial buildings, offices, and suspended ceiling voids. Typical load up to 200 N/m over 2 m span. Medium Duty (M): Power distribution in multi-storey commercial buildings, hospitals, and educational facilities. Typical load up to 800 N/m over 2 m span, with maximum deflection not exceeding 1/100 of span. Heavy Duty (H): Industrial plants, substations, utility tunnels, and process facilities with high cable density. Typical load up to 1800 N/m over 2 m span. Extra Heavy Duty (E): Infrastructure projects, power generation stations, and heavy industrial environments with bundled HV/LV power cables. Typical load from 2000 N/m to 5400 N/m over 2 m span. Deflection limit set to 1/120 of span. All duty ratings are verified by type testing under uniformly distributed load (UDL) conditions per GB/T 23639-2017, Annex A. System safety factor is maintained at a minimum of 1.7. Applicable Standards GB/T 23639-2017 — Cable tray system for energy efficiency and mechanical performance: Defines requirements for load capacity, structural integrity, corrosion resistance, electrical continuity, and fire performance of metallic cable tray systems JB/T 10216-2013 — Cable tray for electrical installation: Specifies duty classifications, dimensional tolerances, material requirements, protective coating adhesion, and type-test procedures for ladder, perforated, and solid-bottom trays GB/T 13912 — Metallic coatings — Hot dip galvanized coatings on fabricated iron and steel articles: Specifies minimum coating thickness and uniformity for hot-dip galvanized finishes Frequently Asked Questions What distinguishes duty classifications L, M, H, and E under JB/T 10216-2013? The duty classification is determined by loading capacity tested at a 2000 mm simply supported span. At each classification, the tray must support the specified UDL without exceeding the deflection limit of 1/100 of span (L, M, H) or 1/120 (E). Actual load ratings in newtons per metre are verified via destructive and non-destructive type tests. Selection should reference the project's cable fill weight, anticipated future expansion, and seismic zone requirements. The standard also prescribes safety factor of 1.7 as a minimum across all classes. How is corrosion protection specified for different environmental conditions? Per GB/T 23639-2017 and GB/T 13912, hot-dip galvanized steel (minimum 65 µm zinc coating) is mandatory for outdoor and wet-process areas. Stainless steel grades 304 or 316L are specified for coastal, chemical, or high-humidity environments where chloride exposure exceeds 200 ppm. Pre-galvanized steel (Z275 coating) may be used in dry, clean interior spaces only. Powder coating over galvanized substrate provides supplementary protection where aesthetic requirements or colour coding apply, with adhesion tested per JB/T 10216-2013, Clause 6.4. Does the cable ladder system provide electrical continuity and fault current path? Yes. GB/T 23639-2017 requires that all metallic cable tray systems, including splice joints and fittings, maintain electrical continuity with a resistance not exceeding 0.1 ohm across any joint. This enables the tray to serve as a protective earth conductor. For installations where the tray acts as the sole PE conductor, the cross-sectional area of side rails must meet the requirements of the relevant electrical installation standard. Bonding jumpers across expansion joints and across painted or non-conductive joint interfaces are required to maintain the fault current path.