SECTION 270529
HANGERS AND SUPPORTS FOR COMMUNICATIONS SYSTEMS
PART 1 - GENERAL
1.1
SUMMARY
A.
Provide labor, materials, equipment and services, and perform operations
required for installation of supporting devices and related work as indicated on
the drawings and specified herein.
B.
Work Included: The work shall include, but not be limited to, the following:
1.
Clevis hangers.
2.
Riser clamps.
3.
C-clamps.
4.
I-beam clamps.
5.
One-hole conduit straps.
6.
Two-hole conduit straps.
7.
Round steel rods.
8.
Lead expansion anchors.
9.
Toggle bolts.
10. Wall and floor seals.
11. Cable cleats .
1.2
QUALITY ASSURANCE
A.
1.3
Materials and equipment shall conform to the latest edition of reference
specifications specified herein and to applicable codes and requirements of
local authorities having jurisdiction.
1.
Code Compliance: Comply with applicable electrical code requirements
as applicable to construction and installation of electrical supporting
devices.
2.
Standards : Provide components to IEC / BS standards and equivalent
standards .
SUBMITTALS
A.
Submit the following in accordance with the requirements specified under
"Submittals" in Section 260500.
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Hangers and Supports for
Communications Systems
1.
Product Data:
Submit manufacturer's data on supporting devices
including catalog cuts, specifications, and installation instructions, for each
type of support, anchor, sleeve and seal.
2.
Shop Drawings: Submit dimensioned drawings of fabricated products,
indicating details of fabrication and materials.
3.
Samples : Provide samples of components for Engineer approval .
PART 2 - PRODUCTS
2.1
MATERIALS
A.
Manufactured Supporting Devices
1.
Provide supporting devices which comply with manufacturer's standard
materials, design and construction in accordance with published product
information, as herein specified and as required for installation.
2.
Supports: Provide supporting devices of types, sizes and materials as
required; and having the following construction features:
3.
a.
Clevis Hangers:
For supporting 50mm rigid metal conduit;
galvanized steel; with 13mm diameter hole for round steel rod;
approximately 25 kgs per 100 units.
b.
Reducing Couplings: Steel rod reducing coupling, 13mm x 16mm ;
black steel; approximately 7 kgs per 100 units.
c.
C-Clamps: Galvanized Black malleable iron; 13mm rod size;
approximately 32 kgs per 100 units.
d.
I-Beam Clamps: Galvanized Black steel, 30mm by 5mm stock; 9mm
cross bolt; flange width 50mm ; approximately 24 kgs per 100 units.
e.
One-Hole Conduit Straps: For supporting 20mm rigid metal conduit;
galvanized steel; approximately 3 kgs per 100 units. Standard
saddle clamp also acceptable to BS 131 standards.
f.
Two-Hole Conduit Straps: For supporting 20mm rigid metal conduit;
galvanized steel; 20mm strap width; and 59mm between center of
screw holes.
g.
Hexagon Nuts: For 13mm rod size; galvanized steel; approximately
1.8 kgs per 100 units.
h.
Round Steel Rod:
Galvanized Black steel; 15mm diameter;
approximately 30 kgs per 30 meters.
i.
Offset Conduit Clamps: For supporting 50mm rigid metal conduit;
galvanized steel; approximately 90 kgs per 100 units.
Anchors: Provide anchors of types, sizes and materials indicated, with the
following construction features:
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Hangers and Supports for
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4.
a.
Lead Expansion Anchors: 16mm ; approximately 17 kgs per 100
units.
b.
Toggle Bolts: Spring head; 5mm by 100mm ; approximately 2.2 kgs
per 100 units.
Sleeves and Seals: Provide sleeves and seals, of types, sizes and
materials as required with the following construction features:
a.
5.
2.2
Wall and Floor Seals: Provide factory-assembled watertight wall and
floor seals, of types and sizes indicated; suitable for sealing around
conduit, pipe or tubing passing through concrete floors and walls.
Construct seals with steel sleeves, malleable iron body, neoprene
sealing grommets and rings, metal pressure rings, pressure clamps
and cap screws. Provide smoke and fire stop fittings to maintain five
ratings as specified in Section 260500.
U-Channel Strut Systems: Provide U-channel strut system for supporting
electrical equipment, 2.7mm hot dip galvanized steel, of types and sizes
indicated; construct with 13mm diameter holes,
20mm o.c. on top
surface, with standard green finish. Provide the following fittings which
mate and match with U-channel:
a.
Fixture hangers.
b.
Channel hangers.
c.
End caps.
d.
Beam clamps.
e.
Wiring studs.
f.
Thinwall conduit clamps.
g.
Rigid conduit clamps.
h.
Conduit hangers.
i.
U-bolts.
FABRICATION
A.
Fabricated Supporting Devices
1.
Pipe Sleeves: Provide pipe sleeves of one of the following:
a.
Sheet Metal: Fabricate from galvanized sheet metal; round tube
closed with snap lock joint, welded spiral seams, or welded
longitudinal joint. Fabricate sleeves from the following gauge metal:
75mm and smaller, 1mm; 100 to 150mm 1.6mm ; over 150mm
1.9mm .
b.
Steel Pipe:
Fabricate from Schedule 40 galvanized steel pipe;
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Hangers and Supports for
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remove burrs.
2.
c.
Iron Pipe:
burrs.
Fabricate from cast-iron or ductile-iron pipe; remove
d.
Plastic Pipe: Fabricate from Schedule 80 PVC plastic pipe; remove
burrs.
Sleeve Seals: Provide sleeves for piping which penetrates foundation
walls below grade, or exterior walls as specified in Section 260500.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
3.2
PREPARATION
A.
3.3
Examine conditions at the job site where work of this Section is to be performed
to insure proper arrangement and fit of the work. Start of work implies
acceptance of job site conditions.
B.
Examine the Contract Drawings and specifications in order to insure the
completeness of the work required under this Section.
Verify measurements and dimensions at the job site and cooperate in the
coordination and scheduling of the work of this Section with the work of related
trades, so as not to delay job progress.
C.
Provide templates as required to related trade for location of items.
INSTALLATION
A.
Install hangers, anchors, sleeves and seals as indicated; in accordance with
manufacturer's written instructions and with recognized industry practices to
ensure supporting devices comply with requirements.
B.
Coordinate with other electrical work, including raceway and wiring work, as
necessary to interface installation of supporting devices with other work.
C.
Install hangers, supports, clamps and attachments to support raceways and
electrical equipment properly from building structure. Arrange for grouping of
parallel runs of horizontal conduits to be supported together on trapeze type
hangers where possible. Install supports with spacing indicated and in
compliance with applicable electrical code requirements.
D.
Torque sleeve seal nuts, complying with manufacturer's recommended values.
Ensure that sealing grommets expand to form watertight seal.
END OF SECTION
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