Detailed explanation of galvanized bridge products
Galvanized Cable Tray is a metal support structure used for cable laying, protection, and management, widely used in industries such as power, communication, and construction. Its core feature is galvanized anti-corrosion treatment, suitable for various indoor and outdoor environments.
1. Product classification and structure
(1) Classified by Material
Hot dip galvanized sheet bridge frame: thin coating (5-12 μ m), low cost, general anti-corrosion
Hot dip galvanized (hot-dip galvanized bridge: coating thickness (≥ 65 μ m), strong corrosion resistance
(2) Classified by structural form
Cascade bridge: open structure, good heat dissipation, strong load-bearing capacity
Slot type bridge: fully enclosed structure, dust-proof and anti-interference
Tray type bridge: semi enclosed structure, balancing heat dissipation and protection
Grid format bridge: metal grid structure, lightweight, good ventilation
2. Core performance parameters
(1) Galvanized layer standard
Hot dip galvanized sheet: Coating thickness (μ m) 5~12 Anti corrosion life (years) 5~8
Hot dip galvanizing: coating thickness (μ m) ≥ 65, anti-corrosion life (years) 20~30
(2) Mechanical performance
-Carrying capacity:
-Lightweight (C1 level): ≤ 125kg/m
-Heavy duty (C4 grade): ≥ 250kg/m (requires thickened steel plate)
-Fire resistance rating:
-Ordinary type: No fire protection requirements
-Fireproof type: Passed GB 8624 B1 level (with fireproof coating)
3. Main application scenarios
(1) Power system
-Substation cable laying
-Distribution room bridge system
(2) Industrial sector
-Petrochemical industry (corrosion-resistant hot-dip galvanizing)
-Automobile manufacturing workshop (load-bearing ladder bridge)
(3) Architecture and Communication
-Comprehensive cabling for commercial complexes (trough bridge)
-5G base station cable management (network format bridge)
4. Selection and installation points
(1) Key factors for selection
-Environmental corrosiveness:
-Coastal/chemical zone: Hot dip galvanizing (or stainless steel) must be selected
-Ordinary indoor: Cold galvanizing can meet the requirements
-Cable type:
-Power cable: Cascade type (with good heat dissipation)
-Fiber optic cable/weak wire: slot type (anti-interference)
(2) Installation specifications
-Horizontal installation:
-Support spacing: 1.5-2m (light), 1-1.5m (heavy)
-Height above ground: ≥ 2.5m (pedestrian zone)
-Vertical installation:
-Fixed spacing ≤ 1.5m, seismic supports need to be added (in seismic zone areas)
-Grounding requirements:
-Full length electrical continuity, grounding resistance ≤ 4 Ω
5. Industry standards and certifications
General Manufacturing - International Standard: IEC 61537 Chinese Standard: JB/T 10216-2013 Special Requirements: Zinc Coating Thickness Testing
Fire Protection - International Standard: EN 13501-1 Chinese Standard: GB 29415-2013 Special Requirements: Fire resistant cable trays require additional coating
Environmental Protection - International Standard: RoHS Chinese Standard: GB/T 26572 Special Requirements: Lead free Zinc Plating Process
6. Maintenance and common problems
(1) Daily maintenance
-Cleaning cycle:
-Dust environment: Clean up accumulated dust every 6 months
-Outdoor environment: Check the corrosion of the galvanized layer
-Tightening inspection: annual review of bolt connection points
(2) Fault handling
-Galvanized layer peeling off:
-Partial zinc coating or replacement of sections
-Deformation sagging:
-Add support points or replace the bridge with a higher load-bearing level
Galvanized cable tray is the basic infrastructure for cable laying, and the selection should focus on the anti-corrosion level, bearing capacity, and installation environment.
-Economic choice: Cold galvanized trough bridge for dry indoor use
-Durable choice: Hot dip galvanized ladder bridge for outdoor/industrial areas
-High end demand: dual requirements for corrosion prevention and fire prevention (such as oil platforms), stainless steel cable trays are optional
