Electrical Products
Ladder–Type Cable Tray
Specification in CSI Format
Specification:
Fiberglass Ladder-Type Cable Tray
1.0 Scope
1.1 The cable tray system shall conform to the material and fabrication requirements as per this specification.
2.0 Standards
2.1 The cable tray system shall conform to applicable sections of:
2.1.1 NEMA Standard FG-1 (latest edition)
2.1.2 National Electric Code (NEC)
2.1.3 ASTM E-84 (Class 1 Rating)
2.1.4 UL (Underwriters Laboratories, Inc.) Standards for Non-Metallic Cable Trays.
2.1.5 CSA INTERNATIONAL (National Standard of Canada) CAN/CSA-C22.2 No. 126 Cable Tray Systems
3.0 General
3.1 Tray Requirements
3.1.1 Tray widths 6" (152mm), 9" (229mm), 12"(305mm), 18" (457mm), 24" (610mm), 30" (762mm), and 36" (914mm).
3.1.2 Lengths (as required): 10 Ft. (3m),and 20 Ft. (6m).
3.1.3 Rung spacing (as required): 6" (152mm), 9.25" (235mm), 12" (305mm), and 18.5" (470mm). Rung Type (as required): Standard Rung or Marine Rung
3.1.4 Radius of fittings (as required): 12" (305mm), 24" (610mm), and 36" (914mm)
3.1.5 Resin Systems (as required): Isophthalic Polyester, Vinyl Ester, Halogen-Free Polyester, Phenolic, or Low Smoke / Non-Toxic resin.
3.2 Loading Requirements
3.2.1 There shall be three working load classifications of fiberglass cable tray based on 20 Ft. (6m) support span with a minimum safety factor of 1.5:
3.2.2 Span support criteria shall be as specified
(Reference the following table)
Fiberglass Ladder-Type Cable Tray
1.0 Scope
1.1 The cable tray system shall conform to the material and fabrication requirements as per this specification.
2.0 Standards
2.1 The cable tray system shall conform to applicable sections of:
2.1.1 NEMA Standard FG-1 (latest edition)
2.1.2 National Electric Code (NEC)
2.1.3 ASTM E-84 (Class 1 Rating)
2.1.4 UL (Underwriters Laboratories, Inc.) Standards for Non-Metallic Cable Trays.
2.1.5 CSA INTERNATIONAL (National Standard of Canada) CAN/CSA-C22.2 No. 126 Cable Tray Systems
3.0 General
3.1 Tray Requirements
3.1.1 Tray widths 6" (152mm), 9" (229mm), 12"(305mm), 18" (457mm), 24" (610mm), 30" (762mm), and 36" (914mm).
3.1.2 Lengths (as required): 10 Ft. (3m),and 20 Ft. (6m).
3.1.3 Rung spacing (as required): 6" (152mm), 9.25" (235mm), 12" (305mm), and 18.5" (470mm). Rung Type (as required): Standard Rung or Marine Rung
3.1.4 Radius of fittings (as required): 12" (305mm), 24" (610mm), and 36" (914mm)
3.1.5 Resin Systems (as required): Isophthalic Polyester, Vinyl Ester, Halogen-Free Polyester, Phenolic, or Low Smoke / Non-Toxic resin.
3.2 Loading Requirements
3.2.1 There shall be three working load classifications of fiberglass cable tray based on 20 Ft. (6m) support span with a minimum safety factor of 1.5:
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(Reference the following table)
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3.2.3 Nominal loading depth (as required): 2" (51mm), 3" (76mm), 5" (127mm), 7" (178mm) and 9" (229mm).
4.0 Materials
4.1 The glass fiber to resin content shall be maintained between 45 to 55 percent by weight in all pultruded components except flat sheet which shall be 35 to 45 percent; and, 25 to 45 percent by weight in all molded components.
4.2 All composite material shall have an ultraviolet light inhibiting chemical additive to resist UV degradation.
4.3 All composite material shall be fire retardant and have a flame spread rating of 25 or less (Class 1 Rating) when tested in accordance with ASTM E-84.
4.4 All pultruded products shall have a complete surfacing veil to provide maximum chemical and UV protection.
5.0 Construction
5.1 Straight section tray shall be fiberglass reinforced meeting all the requirements herein described.
5.1.1 The side rail members must turn in.
5.1.2 All rung to side member connections shall have both a mechanical and a chemical (adhesive) lock. The tray shall be assembled by the use of a locking pin made of fiberglass reinforced thermoplastic. The locking pin shall be inserted under pressure with a high strength, chemical resistant adhesive.
5.1.3 All bonded connections must be sanded to maximize adhesion and structural integrity.
5.1.4 The tray interior shall be clear of all projections or sharp objects.
5.1.5 All straight section lengths shall be pre-drilled to accept connector plates.
5.1.6 All cut ends and drilled holes (factory and field) shall be resin coated.
5.2 Fittings are to be pre-fabricated and shall meet all the requirements herein described.
5.2.1 All fittings shall have a nominal 9.25" rung spacing.
5.2.2 All fittings shall be pre-drilled to accept connector plates.
5.2.3 All fittings shall be designed and installed so as to have the same load carrying capacity as the straight sections.
5.2.4 Rung to side member connections shall have both a mechanical and/or chemical (adhesive) lock. Fittings shall be assembled by use of a locking pin made of fiberglass reinforced thermoplastic and/or a stainless steel rivet. The locking pin shall be inserted under pressure with a high strength chemical resistant adhesive.
• All radius 90° and 45° horizontal and vertical bends, all tee’s and crosses for tray types using 6" (152mm), and most 4" (101mm) and 8" (202mm),
C-channel members shall be of concentric curved molded design and made by resin transfer molding.
5.3 Connector Plates and Fasteners:
5.3.1 Connector plates shall be fiberglass and designed with sufficient strength so they may be installed between 0.2 and 0.3 of the length of the span from the support without derating the load carrying capacity of the tray.
5.3.2 Fasteners for connector plates shall be 3/8" (9.5mm) diameter Type 316 Stainless Steel, Monel, Silicon Bronze, or FRP studs & hex nuts as required.
5.4 Accessories
5.4.1 The manufacturer shall be capable of providing all necessary parts (i.e. clamps, support assemblies, etc.) for the installation of a complete fiberglass tray system.
6.0 Acceptable Manufacturer
6.1 The fiberglass ladder type cable tray system shall be manufactured - pultrusion, compression molded, resin transfer molded and/or fabricated by Enduro Systems, Inc., of Houston, Texas USA.
4.0 Materials
4.1 The glass fiber to resin content shall be maintained between 45 to 55 percent by weight in all pultruded components except flat sheet which shall be 35 to 45 percent; and, 25 to 45 percent by weight in all molded components.
4.2 All composite material shall have an ultraviolet light inhibiting chemical additive to resist UV degradation.
4.3 All composite material shall be fire retardant and have a flame spread rating of 25 or less (Class 1 Rating) when tested in accordance with ASTM E-84.
4.4 All pultruded products shall have a complete surfacing veil to provide maximum chemical and UV protection.
5.0 Construction
5.1 Straight section tray shall be fiberglass reinforced meeting all the requirements herein described.
5.1.1 The side rail members must turn in.
5.1.2 All rung to side member connections shall have both a mechanical and a chemical (adhesive) lock. The tray shall be assembled by the use of a locking pin made of fiberglass reinforced thermoplastic. The locking pin shall be inserted under pressure with a high strength, chemical resistant adhesive.
5.1.3 All bonded connections must be sanded to maximize adhesion and structural integrity.
5.1.4 The tray interior shall be clear of all projections or sharp objects.
5.1.5 All straight section lengths shall be pre-drilled to accept connector plates.
5.1.6 All cut ends and drilled holes (factory and field) shall be resin coated.
5.2 Fittings are to be pre-fabricated and shall meet all the requirements herein described.
5.2.1 All fittings shall have a nominal 9.25" rung spacing.
5.2.2 All fittings shall be pre-drilled to accept connector plates.
5.2.3 All fittings shall be designed and installed so as to have the same load carrying capacity as the straight sections.
5.2.4 Rung to side member connections shall have both a mechanical and/or chemical (adhesive) lock. Fittings shall be assembled by use of a locking pin made of fiberglass reinforced thermoplastic and/or a stainless steel rivet. The locking pin shall be inserted under pressure with a high strength chemical resistant adhesive.
• All radius 90° and 45° horizontal and vertical bends, all tee’s and crosses for tray types using 6" (152mm), and most 4" (101mm) and 8" (202mm),
C-channel members shall be of concentric curved molded design and made by resin transfer molding.
5.3 Connector Plates and Fasteners:
5.3.1 Connector plates shall be fiberglass and designed with sufficient strength so they may be installed between 0.2 and 0.3 of the length of the span from the support without derating the load carrying capacity of the tray.
5.3.2 Fasteners for connector plates shall be 3/8" (9.5mm) diameter Type 316 Stainless Steel, Monel, Silicon Bronze, or FRP studs & hex nuts as required.
5.4 Accessories
5.4.1 The manufacturer shall be capable of providing all necessary parts (i.e. clamps, support assemblies, etc.) for the installation of a complete fiberglass tray system.
6.0 Acceptable Manufacturer
6.1 The fiberglass ladder type cable tray system shall be manufactured - pultrusion, compression molded, resin transfer molded and/or fabricated by Enduro Systems, Inc., of Houston, Texas USA.
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