ࡱ> SURg 2bjbjJJ ;L(ub(ub) TT8$@D}0.B!B!B!///////$1a4P"0B! ! !"B!B!"070l+l+l+B!R/l+B!/l+l+-\. nCC!^8./M00}0T.5!~5\.\.85.TB!B!l+B!B!B!B!B!"0"0p&B!B!B!}0B!B!B!B!5B!B!B!B!B!B!B!B!B!TB : SECTION 260529 - HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS Latest Update: 5-6-2017 See Underlined Text. (Engineer shall edit specifications and blue text in header to meet project requirements. This includes but is not limited to updating Equipment and/or Material Model Numbers indicated in the specifications and adding any additional specifications that may be required by the project. Also turn off all Underlines.) Last Update: 6.9.11. Reformatted and See Underlined Text. GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this section and all other sections of Division 26. SUMMARY This Section includes the following: Hangers and supports for electrical equipment and systems. Construction requirements for concrete bases. DEFINITIONS EMT: Electrical metallic tubing. IMC: Intermediate metal conduit. RMC: Rigid metal conduit. PERFORMANCE REQUIREMENTS Design supports for multiple raceways capable of supporting combined weight of supported systems and its contents. Design equipment supports capable of supporting combined operating weight of supported equipment and connected systems and components. Consult structural engineer on safety factor to be specified in paragraph below, or delete and let applicable code determine strength. Retain below if strength that exceeds code requirements is desired. Rated Strength: Adequate in tension, shear, and pullout force to resist maximum loads calculated or imposed for this Project, with a minimum structural safety factor of five times the applied force. SUBMITTALS Product Data: For the following: Steel slotted support systems. Shop Drawings:Signed and sealed by a qualified professional engineer. Show fabrication and installation details and include calculations for the following: Trapeze hangers. Include Product Data for components. Steel slotted channel systems. Include Product Data for components. Equipment supports. Welding certificates. QUALITY ASSURANCE Welding: Qualify procedures and personnel according to AWSD1.1/D1.1M, "Structural Welding Code - Steel." Comply with NFPA70. COORDINATION Coordinate size and location of concrete bases. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified in Division03. Coordinate installation of roof curbs, equipment supports, and roof penetrations. These items are specified in Division07 Section "Roof Accessories." WARRANTY/GUARANTEE See Division 26 Specification Section Basic Electrical Requirements for warranty and guarantee requirements. PRODUCTS SUPPORT, ANCHORAGE, AND ATTACHMENT COMPONENTS Steel Slotted Support Systems: Comply with MFMA-4, factory-fabricated components for field assembly. Manufacturers: Subject to compliance with requirements, provide products by one of the following: Allied Tube & Conduit. Cooper B-Line, Inc.; a division of Cooper Industries. ERICO International Corporation. GS Metals Corp. Thomas & Betts Corporation. Unistrut; Tyco International, Ltd. Wesanco, Inc. Metallic Coatings: Hot-dip galvanized after fabrication and applied according to MFMA-4. Channel Dimensions: Selected for applicable load criteria. Raceway and Cable Supports: As described in NECA1 and NECA101. Conduit and Cable Support Devices: Steel and malleable-iron hangers, clamps, and associated fittings, designed for types and sizes of raceway or cable to be supported. Support for Conductors in Vertical Conduit: Factory-fabricated assembly consisting of threaded body and insulating wedging plug or plugs for non-armored electrical conductors or cables in riser conduits. Plugs shall have number, size, and shape of conductor gripping pieces as required to suit individual conductors or cables supported. Body shall be malleable iron. Structural Steel for Fabricated Supports and Restraints: ASTMA36/A36M, steel plates, shapes, and bars; black and galvanized. Coordinate paragraph and subparagraphs below with installation requirements in Part3. Mounting, Anchoring, and Attachment Components: Items for fastening electrical items or their supports to building surfaces include the following: Verify suitability of fasteners in subparagraph below for use in lightweight concrete or concrete slabs less than 4 inches (100 mm) thick. Powder-Actuated Fasteners: Threaded-steel stud, for use in hardened portland cement concrete, steel, or wood, with tension, shear, and pullout capacities appropriate for supported loads and building materials where used. Manufacturers: Subject to compliance with requirements, provide products by one of the following: Hilti Inc. ITW Ramset/Red Head; a division of Illinois Tool Works, Inc. MKT Fastening, LLC. Simpson Strong-Tie Co., Inc.; Masterset Fastening Systems Unit. Mechanical-Expansion Anchors: Insert-wedge-type, zinc-coated steel, for use in hardened portland cement concrete with tension, shear, and pullout capacities appropriate for supported loads and building materials in which used. Manufacturers: Subject to compliance with requirements, provide products by one of the following: Cooper B-Line, Inc.; a division of Cooper Industries. Empire Tool and Manufacturing Co., Inc. Hilti Inc. ITW Ramset/Red Head; a division of Illinois Tool Works, Inc. MKT Fastening, LLC. Concrete Inserts: Steel or malleable-iron, slotted support system units similar to MSS Type18; complying with MFMA-4 or MSSSP-58. Clamps for Attachment to Steel Structural Elements: MSSSP-58, type suitable for attached structural element. Through Bolts: Structural type, hex head, and high strength. Comply with ASTMA325. Toggle Bolts: All-steel springhead type. Hanger Rods: Threaded steel. FABRICATED METAL EQUIPMENT SUPPORT ASSEMBLIES Description: Welded or bolted, structural-steel shapes, shop or field fabricated to fit dimensions of supported equipment. Materials: Comply with requirements in Division05 Section "Metal Fabrications" for steel shapes and plates. EXECUTION APPLICATION Comply with NECA1 and NECA101 for application of hangers and supports for electrical equipment and systems except if requirements in this Section are stricter. Maximum Support Spacing and Minimum Hanger Rod Size for Raceway: Space supports for EMT, IMC, and RMC as required by NFPA70. Minimum rod size shall be 1/4 inch in diameter. Multiple Raceways or Cables: Install trapeze-type supports fabricated with steel slotted support system, sized so capacity can be increased by at least 25 percent in future without exceeding specified design load limits. Secure raceways and cables to these supports with single-bolt conduit clamps using spring friction action for retention in support channel. SUPPORT INSTALLATION Consult structural engineer for requirements in this Article. Comply with NECA1 and NECA101 for installation requirements except as specified in this Article. Strength of Support Assemblies: Where not indicated, select sizes of components so strength will be adequate to carry present and future static loads within specified loading limits. Minimum static design load used for strength determination shall be weight of supported components plus 200 lb. Mounting and Anchorage of Surface-Mounted Equipment and Components: Anchor and fasten electrical items and their supports to building structural elements by the following methods unless otherwise indicated by code: To Wood: Fasten with lag screws or through bolts. To New Concrete: Bolt to concrete inserts. To Masonry: Approved toggle-type bolts on hollow masonry units and expansion anchor fasteners on solid masonry units. To Existing Concrete: Expansion anchor fasteners. Retain first subparagraph below if powder-actuated devices are allowed. Consider deleting if Project contains both lightweight and standard-weight concrete and more than one thickness of concrete slab. Instead of expansion anchors, powder-actuated driven threaded studs provided with lock washers and nuts may be used in existing standard-weight concrete 4 inches thick or greater. Do not use for anchorage to lightweight-aggregate concrete or for slabs less than 4 inches thick. To Steel: Beam clamps (MSSType19, 21, 23, 25, or 27) complying with MSSSP-69. To Light Steel: Sheet metal screws. Items Mounted on Hollow Walls and Nonstructural Building Surfaces: Mount cabinets, panelboards, disconnect switches, control enclosures, pull and junction boxes, transformers, and other devices on slotted-channel racks attached to substrate Drill holes for expansion anchors in concrete at locations and to depths that avoid reinforcing bars. INSTALLATION OF FABRICATED METAL SUPPORTS Coordinate installation requirements in this Article with structural engineer. Comply with installation requirements in Division05 Section "Metal Fabrications" for site-fabricated metal supports. Cut, fit, and place miscellaneous metal supports accurately in location, alignment, and elevation to support and anchor electrical materials and equipment. Field Welding: Comply with AWSD1.1/D1.1M. CONCRETE BASES Coordinate this Article with Division03 Section "Cast-In-Place Concrete" or "Cast-in-Place Concrete (Limited Applications)." Construct concrete bases of dimensions indicated but not less than 4 inches larger in both directions than supported unit, and so anchors will be a minimum of 10 bolt diameters from edge of the base. Use 3000-psi, 28-day compressive-strength concrete. Concrete materials, reinforcement, and placement requirements are specified in Division03 Section "Cast-in-Place Concrete." Anchor equipment to concrete base. Place and secure anchorage devices. Use supported equipment manufacturer's setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded. Install anchor bolts to elevations required for proper attachment to supported equipment. Install anchor bolts according to anchor-bolt manufacturer's written instructions. PAINTING Retain paragraph and subparagraph below if a Division09 painting Section is not in Project Manual. Touchup: Clean field welds and abraded areas of shop paint. Paint exposed areas immediately after erecting hangers and supports. Use same materials as used for shop painting. Comply with SSPC-PA1 requirements for touching up field-painted surfaces. Apply paint by brush or spray to provide minimum dry film thickness of 2.0 mils. Retain first paragraph below if a Division09 painting Section is in Project Manual. Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTMA780. 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