CABLE TRAYS

This guide specification has been prepared by GS Metals Corp. to assist design professionals in the preparation of a specification section covering metal cable trays of the types and sizes included in NEMA VE 1.

Since it has been prepared according to the principles established in the Manual of Practice published by The Construction Specifications Institute (CSI) including the use of section numbers and titles from the 1995 Edition of MasterFormat, this guide specification may be used in conjunction with most commercially available master specifications sections with minor editing.

The following should be noted in using this guide specification:

• Optional text requiring a selection by the user is enclosed within brackets, e.g.: Section [01330] [_____].”
• Items requiring user input are enclosed within brackets, e.g.: Section [_____ - _______].”
• Optional paragraphs are separated by an OR” statement, e.g.:

• Metric equivalents to inch-pound units follow the inch-pound units and are contained within parenthesis. Metric measurements are rationalized units based on the SI system of measurement. Delete either the inch-pound or metric units of measure depending on project requirements; do not include both units in a project specification, as conflicting requirements could result.

1. GENERAL

   1.1 SUMMARY

   1. Section Includes:
      Edit the following paragraphs to coordinate with other sections of the Project Manual.
      1. Shop fabricated metal cable trays and fittings.
      2. Metal channel framing system.
      3. Supports and accessories.
   2. Related Sections:
      Edit the following paragraphs to coordinate with other sections of the Project Manual.
      1. Section [07840 - Firestopping.] [______-____________.]
      2. Section [16060 - Grounding and Bonding.] [______-____________.]
      3. Section [16070 - Supporting Devices.] [______-____________.]

   1.2 REFERENCES

   List reference standards that are included within the text of this section. Edit the following as required for project conditions.

   1. American Society for Testing and Materials (ASTM):
      1. A 123 - Standard Specification for Zinc (Hot-Galvanized) Coatings on Products Fabricated From Rolled, Pressed, and Forged Steel Shapes, Plates, Bars and Strips.
      2. A 569 - Standard Specification for Steel, Carbon (0.15 Maximum, Percent), Hot-Rolled Sheet and Strip Commercial Quality.
      3. A 570 - Standard Specification for Steel, Sheet and Strip, Carbon, Hot-Rolled, Structural Quality.
      4. A 653/A 653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.
      5. B 209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.
      6. B 209M - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric).
      7. B 221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes.
      8. A 240 - Standard Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels.
      9. B 766 - Specification for Electrodeposited Coatings of Cadmium.
   2. National Electrical Manufacturers Association (NEMA):
      1. VE 1 - Metal Cable Tray Systems.
      2. VE 2 - Metal Cable Tray Installation Guidelines.
   3. National Fire Protection Association (NFPA) 70 - National Electrical Code.
   4. National Uniform Seismic Installation Guidelines (NUSIG).

   1.3 DESIGN AND ASSEMBLY REQUIREMENTS

   Edit the following paragraph to suit project requirements.

   1. Design Requirements for Cable Trays:
      1. Uniform Live Load Plus Dead Loads: [____] lbs/ft ([__] N/m).
      2. Maximum Deflection: [L/180.] [____.]
      3. In accordance with [applicable code.] [________.]
      4. Accommodate expansion and contraction of assembled linear trays according to their ambient environment per NEMA VE1 and VE 2.
      5. Seismic Design: Conform to NUSIG requirements.
      Alternately, the NEMA VE 1 Class designation may be used. The VE 1 designation indicated below is the working load designation and the support span in feet. The tray width, depth, and style must also be considered with respect to load and allowable deflection.

      Available Support Spans: 8, 12, 16, and 20 ft.
      Working Load Designations:
      A - 50 lbs/ft
      B - 75 lbs/ft
      C - 100 lbs/ft

      For example, a cable tray required to span 20 ft between supports while supporting a cable static weight of 80 lb per ft is designated Class 20C - “20"' for the span and “C” for the load designation.

      Consult NEMA VE 1 and VE 2 for additional information, safety factors, and requirements for seismic design.

   2. Design Requirements for Cable Trays: NEMA VE 1 Class [________].

   1.4 SUBMITTALS

   Edit the following to coordinate with Division 1.

   1. Submit under provisions of Section [01330] [_____]:
      1. Product Data: Provide data for fittings and accessories.
      2. Shop Drawings: Indicate layout, tray type, support framing, components and fittings, connections, dimensions, support points, finishes, and accessories.
      3. Manufacturer's Instructions: Indicate application conditions and limitations of use stipulated by Product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, and installation of Product.
   2. Submit under provisions of Section [01780] [_____]:
      1. Project Record Documents: Record actual routing of cable tray and locations of supports.

   1.5 REGULATORY REQUIREMENTS

   Delete this article if regulatory requirements are addressed in Division 1.

   1. Conform to requirements of NFPA 70.

      Authorities having jurisdiction regarding electrical code enforcement accept Underwriters Laboratories listing and classification as evidence that a product meets adequate safety standards and, in the case of classification, is suitable for the classified environment or application. Many authorities also accept similar listing and classification from other testing agencies.

      The second choice in the paragraph below permits other testing agencies, including Underwriters Laboratories, to provide such a determination.

   2. Products: Listed and classified by [Underwriters Laboratories, Inc.] [testing firm acceptable to the authority having jurisdiction] as suitable for the purpose specified and indicated.

   1.6 FIELD MEASUREMENTS

   1. Verify that field measurements are as [indicated [on shop drawings].] [instructed by manufacturer.]

2. PRODUCTS

   2.1 MANUFACTURERS

   1. This section is based on products by GS Metals Corp. Edit the following to coordinate with Division 1.
   2. Substitutions: Under provisions of Section [01630] [_____].

   2.2 CABLE TRAY

   1. Product: GLOBETRAY cable tray system.

      Select finish required considering environment conditions. Two categories of galvanizing are available for steel trays only; a natural mill finish or anodizing is available for aluminum. Special paint or PVC coating may be applied to steel and aluminum trays that have been properly prepared and primed.

      Select the coating finish based on the environment in which it is placed:

      • aluminum is versatile and suitable for most environments,
      • a normal interior environment may only require a shop galvanized steel sheet coating,
      • an exposed exterior environment may require a hot dip after fabrication galvanized coating,
      • a corrosive environment (interior or exterior) will probably require a protective special paint or PVC finish on steel, or stainless steel
      Carefully edit one or both of the following paragraphs to suit the selected or preferred GLOBETRAY product.
   2. Steel Tray:
      1. Construction: [Fabricated of two side rails and bottom.] [One piece of rails and bottom.]
      2. Duty: [Light.] [Medium.] [Heavy.]
      3. Steel Sheet: ASTM A 569.
      4. Bottom: [Solid sheet.] [Ladder type.] [Sheet perforated for ventilation, minimum 60 percent solid plane for support.]
      5. Finish: [ASTM A 653/A 653M, hot dip shop galvanized before fabrication.] [ASTM A 123, hot dip galvanized after fabrication.] [PVC coated.] [Painted, [______] finish.]

      **** OR ****

      The alloys described below are ASTM B 209 for trough and solid bottom type cable tray fabricated from sheet aluminum, and ASTM B 221 for ladder type cable tray fabricated from extruded aluminum.

   3. Aluminum Tray:
      1. Construction: [Fabricated of two side rails and bottom.] [One piece of rails and bottom.]
      2. Duty: [Light.] [Medium.] [Heavy.]
      3. Aluminum: ASTM [[B 209] B 209M], 5052 alloy, H34 temper.] [B 221, 6063 alloy, T6 temper.]
      4. Bottom: [Solid sheet.] [Ladder type.] [Sheet perforated for ventilation, minimum 60 percent solid plane for support.]
      5. Finish: [Natural mill.] [Clear anodized.] [PVC coated.]

      **** OR ****

   4. Stainless Steel Tray:
      1. Construction: [Fabricated of two side rails and bottom.] [One piece of rails and bottom.]
      2. Duty: [Light.] [Medium.] [Heavy.]
      3. Stainless Steel Sheet: ASTM A 240, [Alloy 304, 2D finish.] [Alloy 316L, 2B finish.]
      4. Bottom: [Solid sheet.] [Ladder type.] [Sheet perforated for ventilation, minimum 60 percent solid plane for support.]

      Select one of the following three paragraphs; each are based on the nominal depth of the tray; 3, 4, or 6 inches.

   5. Nominal Inside Depth: 3 inches (75 mm):
      1. Nominal Inside Width: [4] [6] [9] [12] [18] [24] inches ([100] [150] [225] [300] [450] [600] mm).
      2. Straight Section Rung Spacing: [6] [9] [12] inches ([150] [225] [300] mm) on center. Section Lengths: 12 feet (3.6 m).

      **** OR ****

   6. Nominal Inside Depth: 4 inches (100 mm):
      1. Nominal Inside Width: [4] [6] [9] [12] [18] [24] [30] [36] inches ([100] [150] [225] [300] [450] [600] [750] [900] mm).
      2. Straight Section Rung Spacing: [6] [9] [12] [18] inches ([150] [225] [300] [450] mm) on center.
      3. Section Lengths: [12] [24] feet ([3.6] [7.2] m).

      **** OR ****

   7. Nominal Inside Depth: 6 inches (150 mm):
      1. Nominal Inside Width: [4] [6] [9] [12] [18] [24] [30] [36] inches ([100] [150] [225] [300] [450] [600] [750] [900] mm).
      2. Straight Section Rung Spacing: [6] [9] [12] [18] inches ([150] [225] [300] [450] mm) on center.
      3. Section Lengths: [12] [24] feet ([3.6] [7.2] m).
   8. Inside Radius of Fittings: [[12] [24] [36] inches ([300] [600] [900] mm).] [As indicated.]
   9. Cover Style:
      1. Duty: [Light.] [Medium.] [Heavy.]
      2. Edges: [Flanged downward.] [Non-flanged.]
      3. Cover: [Solid sheet, flush.] [Solid sheet, peaked.] [Ventilated with louvers.]
      4. Cover Extenders: To permit ventilation under solid sheet covers.
      5. Cover Fasteners: [Clamps of steel,] [aluminum,] with bolts and nuts.] [Clips of spring steel [with thumb screw].]
   10. Divider Strips: [Straight section] [horizontal fitting] [and] [vertical fitting] types, [ASTM A 569 steel, [ASTM A 653/A 653M pre-galvanized] [ASTM A 123 hot dip galvanized after fabrication].] [ASTM [B 209] [B 209M] aluminum.]
   11. Fittings: Manufacturer's standard splice plates, elbows, risers, tees, crosses, Y, reducer plates, blind ends, barrier strips, radiused drop-outs, divider strips with resilient PVC cap strip; [solid bottom.] [ventilated.] [Each item plated or coated same as cable tray.]
   12. Cable Accessories: Manufacturer's standard [cable clamps and supports,] [cable ties,] [conduit clamps and brackets,] [________].
   13. Attachment Accessories: Manufacturer's standard bolt and nut fasteners, clamps, J-bolts, hangers, and connectors. [Each item electro zinc plated or coated same as cable tray.]
   14. Installation Accessories: Manufacturer's standard [cable roller,] [cable pulley,] [________].
   15. Grounding Straps: [600] [2000] ampere rated, [insulated 2 AWG copper cable,] [insulated 2 AWG aluminum cable,] [Braided copper cable,] with tin-plated terminals ends.
   16. Warning Signs: Manufacturer’s standard self-adhering label, black letters on white background, identified with following:
       1. "WARNING: NOT TO BE USED AS WALKWAY.”
       2. Manufacturer name and address.
       3. UL Classification.
       4. Minimum area, catalog number with code descriptions, and customer order number.

       2.3 SUPPORT COMPONENTS

       1. Product: GLOBE STRUT metal framing system.
       2. Hanger Channels:
       3. 1. Configuration: [Regular channel] [Knockout channel] [Punchout channel] [Slotted hole channel] [Slotted channel] type.
       4. Material: [Plain steel, ASTM A 570, Grade 33.] [Hot-dip galvanized steel, ASTM A 653/A 653M.] [Aluminum, ASTM B 221, 6063-T6 alloy.]
       5. Finish: [Factory applied green paint.] [G90 galvanized.] [Mill finish aluminum.]
   17. Accessories: Brackets, anti-sway devices [, seismic bracing], attachments, and others to suit project conditions. [Each item plated or coated same as cable tray.]

3. EXECUTION

   3.1 INSTALLATION

   1. Install cable tray in accordance with NEMA VE 2 and manufacturer's instructions.
   2. Support trays in accordance with NUSIG requirements for seismic stabilization.
   3. Provide supports at each connection point, at the end of each run, and at other points to maintain spacing between supports of [____] feet ([____] mm) maximum.
   4. Use expansion connectors where required; install per NEMA VE1 and VE2.
   5. Provide firestopping to requirements of Section [07840] [________] to sustain ratings when passing cable tray through fire rated construction.
   6. Ground and bond cable tray to requirements of Section [16060] [________]:
      1. Provide continuity between tray components.
      2. Use antioxidant compound to prepare and coat aluminum contact surfaces before assembly.
      3. Provide equipment grounding conductor through entire length of tray; bond to each component.
      4. Connections to tray may be made using mechanical or exothermic connectors.
   7. Install warning signs at [12] [24] [____] foot ([3.5] [7.2] [____] m) centers along cable tray; locate in location that is visible after surrounding components are installed or placed.

   END OF SECTION

   GS Metals Corp. 16134- Cable Trays

   June 19, 1997 Filename 16134.DOC