SECTION 27 0531

Rooftop Conduit Support for Communications Systems

Part 1 - General

1.1 Description of Work

  1. The work of this section consists of furnishing all labor, equipment, materials, and accessories, and performing all operations required for the correct installation of recycled rubber conduit and box supports for electrical conduit systems on roofs.

1.2 Related Work

  1. See the following specification sections for work related to the work of this section:
    1. 27 0500 General Requirements for Communication Systems
    2. 27 0529 Communication System Raceways and Fittings
      1. Specifically note the requirements for:
        1. Galvanized rigid conduit
        2. Threaded fittings
        3. Erickson three-piece connectors.
    3. 27 0528 Communication System Junction and Pull Boxes
    4. General sections of the specifications and drawings for specific requirements associated with the roofing consultant.

1.3 Standards and Codes

  1. Work and material shall be in compliance with and according to the requirements of the latest revision of the following standards and codes:
      1. National Electrical Manufacturer's Association (NEMA)
      2. American National Standards Institute (ANSI)
      3. National Fire Prevention Act (NFPA)
        1. National Electric Code 2011 (NEC)
      4. Relevant State Electric and Fire Codes
      5. Institute of Electrical and Electronic Engineers (IEEE)
      6. Underwriters Laboratories, Inc. (UL)
      7. Telecommunications Industry Association / Electronic Industries Alliance (TIA/EIA)
        1. 568-C.0-2012: Generic Telecommunications Cabling for Customer Premises
        2. 568-C.1-2012: Commercial Building Telecommunications Cabling Standard
        3. 568-C.2-2010: Balanced Twisted-Pair Telecommunications Cabling and Components Standards
        4. 568-C.3-2011: Optical Fiber Cabling Components Standard
        5. 568-C.4-2011: Broadband Coaxial Cabling and Components Standard
        6. 569-C-2012: Commercial Building Standard for Telecommunications Pathways and Spaces
        7. 598-C-2005: Color Coding of Optical Fiber Cables
        8. 606-B-2012: The Administration Standard for the Telecommunications Infrastructure of Commercial Buildings
        9. 607-B-2011: Telecommunications Bonding and Grounding (Earthing) for Customer Premises
        10. 758-B-2012: Customer-Owned Outside Plant Telecommunications Infrastructure Standard
      8. American Society for Testing and Materials (ASTM)
        1. A653 G90 SS Gr.33 – Specification for Sheet Steel, Zinc coated (Galvanized) by the hot dipped process.
        2. B633 – Specification for Electrodeposited coatings of Zinc on Iron and steel
        3. D412 – Test Methods for Vulcanized Rubber and Thermoplastic Elastomers – Tension
        4. D395 – Test Methods for Rubber Property – Compression Set
        5. D573 – Test Method for Rubber – Deterioration in an Air Oven
        6. D746 – Test Method for Brittleness Temperature of Plastics and Elastomers by Impact
        7. D2240 – Test Method for Rubber Property – Durometer Hardness

    1.4 Submittals

    1. As specified in Division 1 and Section 27 0500.
    2. Catalog Data: Provide manufacturer’s descriptive literature.

    Part 2 - Products

    2.1 Roof Conduit Support System

    1. Curb base must be made of 100% recycled rubber and polyurethane prepolymer with a support capacity of 2500 pounds per linear foot of support:
      1. Provide appropriate documentation associated with the recycled product to assist with LEED Certification.
    2. Each base to have a reflective yellow stripe.
    3. Dimensions are to be six inches wide by height and width as required.
    4. Steel frame is to be 14 gauge galvanized for D and CE series and 12 gauge strut galvanized for CB and CS series.
    5. Attaching hardware is to be zinc plated threaded rod, nuts and attaching hardware per ASTM B633.
    6. Manufacturer: B-Line C-Port series or approved equal.

    2.2 CONDUIT CLAMPS ARE TO BE CHANNEL STYLE SIMILAR TO GALVANIZED B-LINE B2000 SERIES

    Part 3 - Execution

    3.1 Installation

    1. Install in accordance with manufacturer’s instructions and recommendations.
    2. Install after coordination with the roofing contractor such that the roofing contractor’s guarantee is maintained.
    3. Attach to roof as per roofing contractor’s instructions.
    4. Space conduit and box supports in accordance with appropriate electrical codes.
    5. Utilize CE series supports for conduit where CS supports are used for boxes so as to avoid offsets and unions where possible.

    End Section

    Version 20130214.1100