HomeMy WebLinkAbout260529 - HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS.pdfMatt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 1 of 10
March 23, 2012
Section 260529
Hangers and Supports for Electrical Systems
PART 1 � GENERAL
1.01 SUMMARY
A. This Section includes the following:
1. Hangers and supports for conduit, boxes and other electrical equipment and
systems.
2. Construction requirements for concrete bases.
1.02 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
B. Section 03 30 00 – concrete.
C. Division 26.
D. Division 28.
1.03 REFERENCES
A. Review the Drawings and all sections of the Specifications for equipment furnished by
other Contractors and the Owner throughout the entire project.
B. See references noted in Specification Section 26 05 00, Paragraph 1.03.
C. ANSI/ASTM/TIA/EIA�568�B.
D. ANSI/ASTM/TIA/EIA�569�A.
E. AISI – American Iron and Steel Institute.
F. UL Standard 2239 – Hardware for the Support of Conduit, Tubing and Cable.
1.04 DEFINITIONS
A. EMT: Electrical metallic tubing.
B. IMC: Intermediate metal conduit.
C. RMC: Rigid metal conduit.
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Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 2 of 10
March 23, 2012
1.05 .SYSTEM DESCRIPTION
A. Supporting devices for electrical equipment.
1.06 PERFORMANCE REQUIREMENTS
A. Design supports for multiple raceways capable of supporting combined weight of
supported systems and its contents.
B. Design equipment supports capable of supporting combined operating weight of
supported equipment and connected systems and components.
C. 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.
1.07 SUBMITTALS
A. Submit shop drawings and product data under provisions of Division 01 and Section 26
05 00.
B. Product Data: For the following:
1. Steel slotted support systems.
C. Test data and certifications on anchors as requested by Architect.
1.08 QUALITY ASSURANCE
A. Support systems shall be adequate for weight of equipment and conduit, including wiring,
which they carry.
B. Certification of Compliance for all anchoring hardware, in accordance with::
1. AISI.
2. ASTM.
3. UL.
C. Welding: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural
Welding Code � Steel."
D. Comply with NFPA 70.
1.09 COORDINATION
A. Coordinate installation of roof curbs, equipment supports, and roof penetrations. These
items are specified in Division 07 Section "Roof Accessories."
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Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 3 of 10
March 23, 2012
1.10 PROJECT CONDITIONS
A. Verify that concrete is completely cured prior to installing any anchoring devices in the
concrete.
B. Verify that building elements are suitable for securing of anchors:
1. DO NOT secure anchors to any of the following materials: glazed tile units, clay
tiles unites, hollow brick, pre�stressed concrete planks or members.
1.11 DELIVERY, STORAGE AND HANDLINGRELATED DOCUMENTS
A. Deliver, store and handle materials in accordance with Division 01 and Section 26 05 00.
1.12 SEQUENCING AND SCHEDULING
A. Sequence and Schedule work in accordance with Division 01 and Section 26 05 00.
1.13 WARRANTY
A. Warranty in Accordance with requirements of Division 01 and Section 26 05 00.
PART 2 � PRODUCTS
2.01 MANUFACTURERS
A. Hangers and Support wires.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Allied/Power Strut.
b. B�Line, Systems, Inc.
c. Caddy/Erico Products.
d. Midwest Electric.
e. Minerallac.
f. O�Z/Gedney.
g. Hilti
B. One and Two Hole Straps.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Allied/Power Strut.
b. Appleton Electric company
c. Midwest Electric.
d. Steel City/American Electric.
e. Thomas and Betts.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 4 of 10
March 23, 2012
f. O�Z/Gedney.
C. Racks and Supports.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Allied/Power Strut.
b. B�Line, Systems, Inc.
c. Global Metal Products Division, USG Industries, Inc.
d. Kindorf/American Electric.
e. Unistrut Corporation.
f. Wesanco.
D. Steel Slotted Support Systems: Comply with MFMA�4, factory�fabricated components
for field assembly..
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Allied/Power Strut.
b. B�Line, Systems, Inc.
c. ERICO International Corporation.
d. GS Metals Corp.
e. Thomas & Betts Corporation.
f. Unistrut; Tyco International, Ltd.
E. Powder�Actuated Fasteners.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Hilti Inc.
b. ITW Ramset/Red Head; a division of Illinois Tool Works, Inc.
F. Mechanical�Expansion Anchors.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Cooper B�Line, Inc.; a division of Cooper Industries.
b. Hilti Inc.
c. ITW Ramset/Red Head; a division of Illinois Tool Works, Inc.
2.02 SUPPORT, ANCHORAGE, AND ATTACHMENT COMPONENTS
A. Support Channel and hardware:
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Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 5 of 10
March 23, 2012
1. Support channel and hardware used on exterior of building, or in below grade
tunnels or unconditioned basements to be constructed of one or more of the
following:
a. AISI 303/304 Grade stainless steel.
b. Steel with hot�dip galvanized (HDG) coating with a minimum thickness
of 50 micrometers.
c. Steel with mechanically deposited zinc coating with thicknesses between
5 and 107 micrometers. Thickness shall be as required for environmental
conditions of installations.
2. Support channel and hardware used in swimming pools, in pool equipment rooms
and greenhouses to be ASI Grade 303/304 stainless steel.
B. Concrete Anchors:
1. For single strap conduit support, light fixture safety cables: Powder�actuated
fasteners; Hilti DX series or equal.:
2. For threaded rod support of cable tray, transformers, other equipment: Drop�in
type anchor; Hilti HDI/HDI�L series, or equal.
3. Anchors shall be suitable for material secured into and load on anchor.
C. Solid Brick Anchors: Sleeve type anchors; Hilti HLC Series, or equal:
1. Anchors shall be suitable for material secured into and load on anchor.
D. Hangers, Straps and Hardware: Corrosion resistant.
E. Steel Slotted Support Systems: Comply with MFMA�4, factory�fabricated components
for field assembly.
1. Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a. Allied Tube & Conduit.
b. Cooper B�Line, Inc.; a division of Cooper Industries.
c. ERICO International Corporation.
d. GS Metals Corp.
e. Thomas & Betts Corporation.
f. Unistrut; Tyco International, Ltd.
2. Metallic Coatings: Hot�dip galvanized after fabrication and applied according to
MFMA�4.
3. Nonmetallic Coatings: Manufacturer's standard PVC, polyurethane, or polyester
coating applied according to MFMA�4.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 6 of 10
March 23, 2012
4. Painted Coatings: Manufacturer's standard painted coating applied according to
MFMA�4.
5. Channel Dimensions: Selected for applicable load criteria.
F. Raceway and Cable Supports: As described in NECA 1 and NECA 101.
G. Conduit and Cable Support Devices: [Steel] hangers, clamps, and associated fittings,
designed for types and sizes of raceway or cable to be supported.
H. 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.
I. Structural Steel for Fabricated Supports and Restraints: ASTM A 36/A 36M, steel plates,
shapes, and bars; black and galvanized.
J. Mounting, Anchoring, and Attachment Components: Items for fastening electrical items or
their supports to building surfaces include the following:
1. 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.
a. Manufacturers: Subject to compliance with requirements, provide
products by one of the following:
1) Hilti Inc.
2) ITW Ramset/Red Head; a division of Illinois Tool Works, Inc.
2. 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.
a. Manufacturers: Subject to compliance with requirements, provide
products by one of the following:
1) Cooper B�Line, Inc.; a division of Cooper Industries.
2) Hilti Inc.
3) ITW Ramset/Red Head; a division of Illinois Tool Works, Inc.
3. Concrete Inserts: Steel or malleable�iron, slotted support system units similar to
MSS Type 18; complying with MFMA�4 or MSS SP�58.
4. Clamps for Attachment to Steel Structural Elements: MSS SP�58, type suitable
for attached structural element.
5. Through Bolts: Structural type, hex head, and high strength. Comply with
ASTM A 325.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 7 of 10
March 23, 2012
6. Toggle Bolts: All�steel springhead type.
7. Hanger Rods: Threaded steel.
2.03 FABRICATED METAL EQUIPMENT SUPPORT ASSEMBLIES
A. Description: Welded or bolted, structural�steel shapes, shop or field fabricated to fit
dimensions of supported equipment.
B. Materials: Comply with requirements in Division 05 Section "Metal Fabrications" for
steel shapes and plates.
C. Where hardware is used to support equipment or materials having point loads exceeding
50 lbs., hardware shall have a minimum SAE Grade 5 and be rated to exceed applied live
load plus the dead load with a 5:1 safety factor.
2.04 SOURCE QUALITY CONTROL
A. Provide certified tests on manufacturers standard products for all anchors and other
fasteners, when requested by Architect.
PART 3 � EXECUTION
3.01 EXAMINATION
A. Verify anchors and fasteners are correct for material to be installed in.
1. Follow manufacturer’s recommendations for use.
2. Where anchors are used in a shear application, apply appropriate de�rating factors
to load capacity.
3.02 APPLICATION
A. Comply with NECA 1 and NECA 101 for application of hangers and supports for
electrical equipment and systems except if requirements in this Section are stricter.
B. Maximum Support Spacing and Minimum Hanger Rod Size for Raceway: Space
supports for EMT, IMC, and RMC as scheduled in NECA 1, where its Table 1 lists
maximum spacings less than stated in NFPA 70. Minimum rod size shall be 1/4 inch in
diameter.
C. Multiple Raceways or Cables: Install trapeze�type supports fabricated with steel slotted
or other support system, sized so capacity can be increased by at least 25]percent in
future without exceeding specified design load limits.
1. Secure raceways and cables to these supports with two�bolt conduit clamps.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 8 of 10
March 23, 2012
D. Spring�steel clamps designed for supporting single conduits without bolts may be used
for 1 inch and smaller raceways serving branch circuits and communication systems
above suspended ceilings and for fastening raceways to trapeze supports.
3.03 INSTALLATION
A. Raceways, cable assemblies, boxes, cabinets and fittings shall be rigidly supported from
the building structure and securely fastened in place. The supporting means shall provide
vertical support of the weight of the equipment and prevent horizontal movement or
sway.
B. Support suspended raceways, cable assemblies, boxes, cabinets and fittings from
galvanized threaded steel rods. Thread rods size shall be a minimum of 1/4 inch
diameter.
C. Do not support raceways, cable assemblies, boxes, cabinets and fittings with drop wires,
tie wires, or perforated pipe straps.
D. Do not support raceways, cable assemblies, boxes, cabinets and fittings with aircraft style
hangers, such as Gripple hangers, unless specifically indicated in the Contract
Documents.
E. Fasten hanger rods, conduit clamps, and outlet and junction boxes to building structure
unless otherwise indicated. Do not use spring steel clips and clamps.
F. Use toggle bolts or hollow wall fasteners in hollow masonry, plaster, or gypsum board
partitions and walls, expansion anchors or preset inserts in solid masonry walls, self�
drilling anchors or expansion anchor on concrete surfaces, sheet metal screws in sheet
metal studs, and wood screws in wood construction.
G. Do not fasten supports to piping, ductwork, mechanical equipment, or conduit for the
support of other electrical conduits, raceway or equipment.
H. Do not drill structural members without specific permission of the Architect.
I. Install free�standing electrical equipment, such as switchboards, transformers,
panelboards and motor control centers on 4 inch high concrete pads.
J. Install surface�mounted electrical equipment securely with a minimum of four anchors.
Provide full equipment channel supports to stand equipment 3/4 inch from wall for all
electrical equipment installed on masonry and concrete walls.
K. Bridge studs top and bottom with channels to support flush�mounted cabinets and
panelboards in stud walls.
L. Electrical supports from bar joists shall be allowed only at panel points of joists in top
and bottom chords.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 9 of 10
March 23, 2012
3.04 SUPPORT INSTALLATION
A. Comply with NECA 1 and NECA 101 for installation requirements except as specified in
this Article.
B. 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.
C. 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:
1. To Wood: Fasten with lag screws or through bolts.
2. To New Concrete: Bolt to concrete inserts.
3. To Masonry: Approved toggle�type bolts on hollow masonry units and
expansion anchor fasteners on solid masonry units.
4. To Existing Concrete: Expansion anchor fasteners.
5. 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.
6. To Steel: [Welded threaded studs complying with AWS D1.1/D1.1M, with lock
washers and nuts, [Beam clamps (MSS Type 19, 21, 23, 25, or 27) complying
with MSS SP�69].
7. To Light Steel: Sheet metal screws.
8. 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< by means that meet seismic�restraint strength and anchorage
requirements>.
D. Drill holes for expansion anchors in concrete at locations and to depths that avoid
reinforcing bars.
3.05 INSTALLATION OF FABRICATED METAL SUPPORTS
A. Comply with installation requirements in Division 05 Section "Metal Fabrications" for
site�fabricated metal supports.
B. Cut, fit, and place miscellaneous metal supports accurately in location, alignment, and
elevation to support and anchor electrical materials and equipment.
Matt the Miller’s
Carmel, IN
L’Acquis Number: 12056
Section 260529 Hangers and Supports for Electrical Systems Page 10 of 10
March 23, 2012
C. Field Welding: Comply with AWS D1.1/D1.1M.
3.06 CONSTRUCTION
A. Fabricate supports from structural steel or steel channel, rigidly welded or bolted to
present a neat appearance. Use hexagon head bolts with spring lock washers under all
nuts.
END OF SECTION 260529