Grenada ladder-type cable trays are typically fiberglass-reinforced or metallic ladder trays designed for safe, ventilated cable support with high load capacity, fire resistance, and UV protection.

Material and Construction

• Fiberglass Ladder Trays (FRP): Made from pultruded, compression-molded, or resin transfer molded fiberglass reinforced plastic with 45–65% glass fiber content by weight for pultruded components and 25–45% for molded components. All materials include UV inhibitors and are fire retardant with a Class 1 flame spread rating (≤25 per ASTM E-84) for safety .
• Metallic Ladder Trays: Typically constructed from hot-dip galvanized or bare steel, MIG welded, with corrosion-resistant coatings. Side rails and rungs are designed for structural strength and durability .
• Rungs and Side Rails: Ladder trays consist of two longitudinal side rails connected by transverse rungs. Rung spacing is generally 9.25 inches, and connections use mechanical and chemical locks or locking pins for secure assembly .

Dimensions and Load Ratings

• Nominal Depths: 2” (51 mm), 3” (76 mm), 5” (127 mm), 7” (178 mm), and 9” (229 mm) for FRP trays .
• Height Options (Metallic): 50 mm, 70 mm, 100 mm, 120 mm, depending on application .
• Span Support: Load vs. span is calculated based on maximum deflection at mid-span. Continuous spans or different support points may yield higher load ratings. Safe Working Load (SWL) should comply with IEC 61537 standards .

Environmental and Safety Features

• UV and Weather Resistance: FRP trays include surfacing veils for maximum chemical and UV protection .
• Fire Resistance: Materials are fire retardant with Class 1 flame spread rating. Phenolic resin options provide low smoke and toxicity .
• Electrical Properties: Conductive resin systems may include carbon additives to dissipate static electricity, suitable for ABS-classed vessels or facilities .
• Covers: Optional flat or peaked covers are available for additional protection against mechanical damage, moisture, or snow accumulation .

Installation and Fittings

• Straight Sections: Pre-drilled to accept connector plates; interiors are free of sharp projections .
• Fittings: Elbows, tees, risers, reducers, and joint connectors are prefabricated to match straight section load capacity and pre-drilled for easy assembly .
• Assembly: Rung-to-side member connections use mechanical and/or chemical locks, with locking pins or stainless-steel rivets for secure installation .

Applications

• Suitable for industrial, commercial, and residential wiring systems, chemical plants, and areas requiring fire-proof, moisture-proof, dust-proof, and anti-interference cable management .
• FRP trays are lightweight, corrosion-resistant, and ideal for outdoor or harsh environments, while metallic trays provide high structural strength for heavy-duty applications . These specifications ensure that Grenada ladder-type cable trays provide safe, durable, and compliant cable management solutions for a wide range of electrical and industrial installations.