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Master Specification




December 01, 2010

26

05

48
-
1


Vibration &
Seismic Controls For Electrical



Systems


SECTION
26

05

48

VIBRATION AND
SEISMIC CONTROLS FOR ELECTRICAL
SYSTEMS

PART 1

GENERAL

1.01

SECTION INCLUDES

A.

This Section includes seismic restraints and other earthquake
-
damage
-
reduction
measures for electrical components. It complements optional
seismic construction requirements in the various electrical component
Sections.

1.02

RELATED SECTIONS

A.

Section
26 05 33.23



Surface
Raceways
for Electrical Systems

1.03

DEFINITIONS

A.

BOCA: BOCA National
Building Code, 1999.

B.

Seismic Restraint: A fixed device (a seismic brace, an anchor bolt or
stud, or a fastening assembly) used to prevent vertical or horizontal
movement, or both vertical and horizontal movement, of an electrical
system component during a
n earthquake.

C.

Mobile Structural Element: A part of the building structure such as a slab,
floor structure, roof structure, or wall that may move independent of other
mobile structural elements during an earthquake.

1.04

SUBMITTALS

A.

Product Data: Illustrate and

indicate types, styles, materials, strength,
fastening provisions, and finish for each type and size of seismic restraint
component used.

1.

Anchor Bolts and Studs: Tabulate types and sizes, complete with
report numbers and rated strength in tension and
shear as evaluated
by an agency approved by authorities having jurisdiction.

B.

Shop Drawings: For anchorage and bracing not defined by details and
charts on Drawings. Indicate materials, and show designs, details, and
calculations signed and sealed by a Pr
ofessional Engineer.

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1.

Design Calculations and Analysis: To support selection and
arrangement of seismic restraints. Include calculations of combined
tensile and shear loads.

2.

Details: Detail fabrication and arrangement. Detail attachment of
restraints to

both structural and restrained items. Show attachment
locations, methods, and spacings, identifying components and listing
their strengths. Indicate direction and value of forces transmitted to
the structure during seismic events.

C.

Coordination Drawings:

Plans and sections drawn to scale and
coordinating seismic bracing for electrical components with other systems
and equipment, including other seismic restraints, in the vicinity.

D.

Product Certificates: Signed by manufacturers of seismic restraints
certi
fying that products furnished comply with requirements.

E.

Qualification Data: For firms and persons specified in "Quality
Assurance" Article.

1.05

QUALITY ASSURANCE

A.

Comply with seismic restraint requirements in BOCA, 1999, unless
requirements in this Section are

more stringent.

B.

Professional Engineer Qualifications: A professional engineer who is
legally qualified to practice in jurisdiction where Project is located and
who is experienced in providing seismic engineering services, including
the design of seismic
restraints, that are similar to those indicated for this
Project.

C.

Testing Agency Qualifications: An independent testing agency,
acceptable to authorities having jurisdiction, with the experience and
capability to conduct the testing indicated.

D.

Tradesman Q
ualification: Perform all work by skilled mechanics in a
manner that satisfies the National Electrical Code and Bi
-
State policy and
practice.

E.

Welder Qualifications: Perform welding by certified welding operators
currently qualified in accordance with the t
esting procedures of AWS
D1.1 for the weld types and positions for the fabrications and installations
indicated.

F.

Regulatory Requirements: Select only drilled
-
In anchors with published
ICBO ES
Evaluation

Reports indicating conformance with current
applicab
le ICBO ES Acceptance Criteria. Comply with all findings and
other limitations stipulated in the corresponding Evaluation Reports.

Master Specification




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Vibration &
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1.06

PROJECT CONDITIONS

A.

Acceleration Factor: AV = 0.12

B.

Project Seismic Hazard Exposure as Defined in BOCA: Group II.

C.

Seismic Co
efficient (CC): Per BOCA Table 1610.6.4(1).

D.

Performance Criteria Factor (P): Per BOCA Table 1610.6.4(1).

E.

Attachment Amplification Factor (a
C
): Per BOCA Table 1610.6.4(2).

1.07

COORDINATION

A.

Coordinate layout and installation of seismic bracing with building
s
tructural system and engineering features, and with mechanical, fire
-
protection, electrical, and other building features in the vicinity.

B.

Coordinate concrete bases with building structural system.

C.

Drawings

are diagrammatical and do not show offsets, fittin
gs, and
accessories that may be required. Carefully investigate the structural and
finish conditions affecting the Work, and provide required fittings and
accessories.

1.08

DELIVERY, STORAGE, AND HANDLING

A.

Ship each component securely packaged and labeled for safe handling to
avoid
damage or distortion.

B.

Store materials in secure and dry facility and in original packaging in a
manner to prevent soiling, physical damage, wetting or corrosion before
installatio
n.

C.

Where possible, maintain protective coverings until installation is
complete and remove

as part of final clean up.

PART 2

PRODUCTS

2.01

MANUFACTURERS

A.

Available Manufacturers: Subject to compliance with requirements,
manufacturers offering products that may
be incorporated into the Work
include, but are not limited to, the following:

1.

Amber/Booth Company, Inc.

2.

B
-
Line Systems, Inc.

Master Specification




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Vibration &
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3.

Erico, Inc.

4.

GS Metals Corp.

5.

Loos & Company, Inc.

6.

Mason Industries, Inc,

7.

Powerstrut.

8.

Thomas & Betts Corp.

9.

Unistrut Corporation.

2.02

MATERIALS

A.

Use preformed structural channels, tubing, supports, and hangers that is
hot
-
dipped galvanized corrosion resistant structural grade steel conforming
to ASTM A 570, Grade 33 and ASTM A 653, Grade 33 and suitable for the
environment where it is in
stalled.

B.

Provide isolating material including sleeves, washers and pads between
dissimilar materials.

C.

Hardware: Complete set of hardware, including machine bolts, washers,
lock washers, nuts and lock nuts required to complete the hanger and
associated sup
port, anchor and concrete insert installation.

1.

Stainless steel fasteners: Use

stainless steel nuts and washers of
matching alloy group and minimum proof stress equal to, or greater
than, the specified minimum full
-
size tensile strength of the externally
threaded fastener. Nuts: conform to ASTM F 594.

2.

Galvanized fasteners:
Use hot dipped galvanized or stainless steel
material as required for compatibility with associated support, hangar,
anchor or insert material.

3.

Threaded fastener adhesive compound:
"Threadlockers" liquid as
manufactured by Henkel Loctite Corporation.

D.

Use the following materials for restraints:

1.

Coordinate three subparagraphs below with Drawings.

2.

Indoor Dry Locations: Steel, zinc plated.

3.

Outdoors and Damp Locations: Galvanized steel
.

4.

Corrosive

Locations: Stainless steel.

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E.

Conduit,
cable

tray and bus duct hangers:

1.

Finish: Hot
-
dip galvanize hangars, rods, channels and hardware after
fabrication.

2.

Capacity: Total weights of conduits, cable trays or bus ducts and wires,
hanger dead load,
plus an additional 200 pounds.

3.

Hangers: Fabricate hangers from two or more steel hanger rods,
horizontal member (preformed channel), U
-
bolts, clamps, and other
attachments as necessary for securing hanger rods, conduits, cable
trays and bus ducts.

4.

Hanger

rods: stress at the root of the thread less than 9,475

psi at
design load.

5.

Horizontal members: Size not to exceed maximum stress of 12,650 psi
at design load.

2.03

ANCHORAGE AND STRUCTURAL ATTACHMENT COMPONENTS

A.

Strength: Defined in reports by ICBO Evaluation
Service or another
agency acceptable to authorities having jurisdiction.

1.

Structural Safety Factor: Strength in tension and shear of
components used shall be at least two times the maximum seismic
forces to which they will be subjected.

B.

Concrete and Masonr
y Anchor Bolts and Studs: Steel
-
expansion wedge
type.

C.

Concrete Inserts: Steel
-
channel type.

D.

Through Bolts: Structural type, hex head, high strength. Comply with
ASTM

A

325.

E.

Welding Lugs: Comply with MSS SP
-
69, Type

57.

F.

Use Not Permitted:

1.

Lead shield
anchors.

2.

Explosive

fasteners.

G.

Wedge Anchors: Wedge type, torque
-
controlled, with impact section to
prevent thread damage and wedge dimples to
prevent

spinning during
installation, complete with required nuts, washers and
manufacturer’s

installation instructions. Ensure that wedge anchors are marked with
Master Specification




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length identification markings conforming to ICBO ES AC01. Furnish
anchors as manufactured by Hilti Kwik Bolt II, ITW Ramset/Red Head
Trubolt Wedge, or approved equal.

1.

Interior Use in C
onditioned Environments within the Building: carbon
steel conforming to ASTM A 510 with zinc plating in accordance with
ASTM B 633.

2.

Exposed Use in Plenums, Utility Shafts, Track Stairs, Tunnels, and
Outdoor Locations: Type 316 stainless steel.

H.

Heavy
-
duty

sleeve anchors: torque
-
controlled, pull
-
down, prestressable
type with provisions for rotation prevention and resistance to vibratory
and dynamic loading. Dynamic loading suitability includes resistance to
fatigue, seismic, and shock loading.

1.

Interior Use

in Conditioned Environments within the Building: carbon
steel anchors conforming to ISO 898, Part 1, Class 8.8.

2.

Exposed Use in Plenums, Utility Shafts, Track Stairs, Tunnels, and
Outdoor Locations: Type 316 stainless steel.

I.

Beam Clamps for Steel Beams a
nd Joists: Double sided. Single
-
sided
type is not acceptable.

J.

Equipment

Supports: prefabricated hot dipped galvanized channels, unless
noted:

1.

Standard structural steel channels, nominal
1
-
1/2 inch by 1
-
1/2 inch,

12
-
gauge, cold
formed, lipped channel, and

designed to accept
special spring
-
held hardened steel nuts for securing anchor bolts or
hangar rods and other attachments. Provide securing equipment
compatible with channel. Provide hot
-
dipped galvanized hanger rods
and associated hardware as required.

2.

Adjust channel

depth as required to satisfy the load requirements and
safety factor. Two or more channels welded together to form members
of greater strength is permitted.

K.

Bushings for Floor
-
Mounted Equipment Anchors: Neoprene units
designed for seismic
ally rated rigid equipment mountings, and matched
to the type and size of anchor bolts and studs used.

L.

Bushing Assemblies for Wall
-
Mounted Equipment Anchorage:
Assemblies of neoprene elements and steel sleeves designed for
seismically rated rigid equipmen
t mountings, and matched to the type
and size of attachment devices used.

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M.

Conduit straps: one
-
hole or heavy
-
duty two
-
hole. Material: hot
-
dipped
galvanized steel or malleable iron.

N.

Support Grip: Conduit
-
Riser Kellems support grips as manufactured by
Hubbell Wire Management Products.

O.

Riser Clamps
: hot
-
dipped galvanized

steel.

2.04

SEISMIC BRACING COMPONENTS

A.

Slotted Steel Channel:
1
-
5/8
-
by
-
1
-
5/8
-
inch

(41
-
by
-
41
-
mm)

cross section,
formed f
rom
0.1046
-
inch
-

(2.7
-
mm
-
)

thick steel, with
9/16
-
by
-
7/8
-
inch

(14
-
by
-
22
-
mm)

slots at a maximum of
2 inches

(50 mm)

o.c. in webs, and
flange edges turned toward web.

1.

Materials for Channel: ASTM

A

570, GR

33.

2.

Materials for Fittings and Accessories: ASTM

A

575,
ASTM

A

576,

or ASTM

A

36.

3.

Fittings and Accessories: Products of the same manufacturer as
channels and designed for use with that product.

4.

Finish: Baked, rust
-
inhibiting, acrylic
-
enamel paint applied after
cleaning and phosphate treatment, unless oth
erwise indicated.

B.

Channel
-
Type Bracing Assemblies: Slotted steel channel, with
adjustable hinged steel brackets and bolts.

C.

Cable
-
Type Bracing Assemblies: Zinc
-
coated, high
-
strength steel wire
rope cable attached to steel thimbles, brackets, and bolts des
igned for
cable service.

1.

Arrange units for attachment to the braced component at one end
and to the structure at the other end.

2.

Wire Rope Cable: Comply with ASTM

603. Use 49
-

or 133
-
strand
cable with a minimum strength of 2 times the calculated maximum
s
eismic force to be resisted.

D.

Hanger Rod Stiffeners: Slotted steel channels with internally bolted
connections to hanger rod.

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PART 3

EXECUTION

3.01

INSTALLATION

A.

Install electrical materials, equipment, and accessories rigid and secure,
plumb and level, and in alignment with related and adjoining work to
provide a complete and operable system. Do not weld electrical materials
for attachment or support.

B.

Install ex
posed conduit, cable tray and bus ducts to avoid conflicts with
other work. Install horizontal raceways close to the ceiling or ceiling beams
and above water or other piping wherever possible.

C.

Apply galvanizing touch
-
up paint to all field cut channel edge
s. Use brush
-
applied touch
-
up paint; spray
-
applied galvanizing touch
-
up paint is not
permitted.

D.

Electrical Conduit, Cable Tray and Bus Duct
-

Installation Requirements

1.

Properly support and anchor conduit to be embedded to maintain
correct location and spa
cing and to prevent flotation during concreting
operations. Provide suitable metal supports for conduits embedded
and stubbing out of concrete surfaces.

2.

Install conduit so that moisture collecting in the conduit will be drained
to the nearest outlet or pu
ll box; provide weep holes at junction boxes
where appropriate.

3.

Wall
-

or Ceiling
-
Conduit Support:

a.

Maximum Spacing: 6
-
foot centers.

b.

Conduits not larger than 1 inch: one
-
hole.

c.

Conduits larger than 1
-
inch: heavy
-
duty two
-
hole.

d.

Space conduits installed agains
t concrete surfaces 1/4 inch away
from the surface by clamp backs or other approved means.

4.

Suspended Conduits:


a.

Support individual horizontal conduits larger than 1
-
1/2 inch in
diameter by individual hangers and hot dipped galvanized steel
conduit straps,
associated support rod, and anchor for vertical
runs.

b.

Support parallel conduits on trapeze hangers, associated support
rods, and anchors. Secure each conduit to the preformed channel
member by a U
-
bolt, one
-
hole strap or other specially designed
and appro
ved fastener suitable for use with the pipe hangers or
channel inserts. Install conduits at least 6

inches away from
parallel runs of pipes and mechanical ductwork.

5.

Support cable trays and bus duct on trapeze hangers, support rods and
drill
-
in anchors. S
ecure each side of the cable tray and bus duct to the
preformed channel member by a U
-
bolt or other specially designed and
approved fastener suitable for use with the channel. Install cable trays
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and bus duct at least 6 inches away from pipes of mechanica
l
ductwork.

6.

Support vertical conduit and cable tray risers with preformed channel
anchored to concrete walls. Provide 1/4
-
inch nonmetallic spacer
between channel and concrete spaces. Support cables installed in
conduits at the top of each utility shaft a
nd at the bottom of each pull
box located in the utility shaft with Use riser clamps and horizontal
channels made from

7.

Hanger rods used in connection with spring
-
steel fasteners, clips and
clamps shall be a minimum of 1/2
-
inch

diameter hanger rods shall be
hot dipped galvanized steel rods. Do not use wire for support of
conduit.

8.

Space supports for conduits, cable trays and bus ducts not over six feet
on centers. Spacing and location of cable tray and bus fittings supports
sha
ll be as described in Section
26 05 33.23
, 3.4C. Securely anchor
conduits, cable trays and bus duct at each end, and run so as not to
interfere with the installation and operation of equipment at the location.

9.

Install Kellems support grips for cables inst
alled in utility shaft vertical
trays where cables enter the shaft and at a maximum spacing of
twenty
-
five feet on center within the shafts. Secure Kellems support
grips to preformed cable tray supports using approved channel fittings
suitable for the cab
le loads. Install Kellems conduit riser cable supports
in conduits as they enter the utility shafts. Riser clamps shall rest on
conduit couplings. Kellems support grips and conduit riser clamps shall
be installed in accordance with the manufacturer’s re
commendations
and instructions.

E.

Consider the Drawings as diagrammatic, showing general arrangement and
location of equipment, boxes, cable tray, bus ducts, and conduits. Follow
the Drawings as closely as practical; final location may be field
-
adjusted
slightly to avoid interference afte
r prior approval in writing is obtained from
the CM. Maintain maintenance aisles and clearances and coordinated with
any modifications to equipment or raceway locations.

F.

Install seismic restraints according to applicable codes and regulations
and as
appr
oved by authorities having jurisdiction, unless more stringent
requirements are indicated.

G.

Locate steel reinforcement to avoid drilling, coring or cutting of steel
reinforced before

drilling into concrete with a portable detection and
measurement device th
at provides an immediate and visible image of
steel reinforcement. Notify CM of any cutting or drilling of steel
reinforcement. Use rebar detection tool Ferroscan FS10 System by Hilti.

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3.02

STRUCTURAL ATTACHMENTS

A.

Use bolted connections with steel brackets, sl
otted channel, and slotted
-
channel fittings to spread structural loads and reduce stresses.

B.

Attachments to New Concrete: Bolt to channel
-
type concrete inserts or
use expansion anchors.

C.

Attachments to Existing Concrete: Use expansion anchors.

D.

Holes for Ex
pansion Anchors in Concrete:

1.

Drill at locations and to depths that avoid reinforcing bars.

2.

Cored Holes: Match tolerances of anchors and core bits where
installed in cored holes.

E.

Attachments to Solid Concrete Masonry Unit Walls: Use expansion
anchors.

F.

At
tachments to Hollow Walls: Bolt to slotted steel channels fastened to
wall with expansion anchors.

G.

Attachments to Wood Structural Members: Install bolts through
members.

H.

Attachments to Steel: Bolt to clamps on flanges of beams or on upper
truss chords o
f bar joists.

I.

Do not install stainless steel anchors in contact with dissimilar metals.

3.04

ELECTRICAL EQUIPMENT ANCHORAGE

A.

Anchor rigidly to a single mobile structural element or to a concrete base
that is structurally tied to a single mobile structural elemen
t.

B.

Anchor panelboards, motor
-
control centers, motor controls, switchboards,
switchgear, transformers, unit substations, fused power
-
circuit devices,
transfer switches, busways, battery racks, static uninterruptible power
units, power conditioners,
capacitor units, communication system
components, and electronic signal processing, control, and distribution
units as follows:

1.

Size concrete bases so expansion anchors will be a minimum of 10
bolt diameters from the edge of the concrete base.

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2.

Concrete Bas
es for Floor
-
Mounted Equipment: Use female
expansion anchors and install studs and nuts after equipment is
positioned.

3.

Bushings for Floor
-
Mounted Equipment Anchors: Install to allow for
resilient media between anchor bolt or stud and mounting hole in
con
crete.

4.

Anchor Bolt Bushing Assemblies for Wall
-
Mounted Equipment:
Install to allow for resilient media where equipment or equipment
-
mounting channels are attached to wall.

5.

Torque bolts and nuts on studs to values recommended by
equipment manufacturer.

3.0
5

SEISMIC BRACING INSTALLATION

A.

Install bracing according to spacing and strengths indicated by approved
analysis.

B.

Thermal Expansion: Install to allow for thermal movement of braced
components.

C.

Cable Braces: Install with maximum cable slack recommended

by
manufacturer.

D.

Attachment to Structure: If specific attachment is not indicated, anchor
bracing to the structure at flanges of beams, upper truss chords of bar
joists, or at concrete members.

3.06

ACCOMMODATION OF DIFFERENTIAL SEISMIC MOTION

A.

Make flexible c
onnections in raceways, cables, wireways, cable trays,
and busways where they cross expansion and seismic control joints,
where adjacent sections or branches are supported by different structural
elements, and where they terminate at electrical equipment a
nchored to a
different mobile structural element from the one supporting them.

3.07

FIELD QUALITY CONTROL

A.

Testing Agency: Engage a qualified testing agency to perform field
quality
-
control tests for pull
-
out resistance of seismic anchorage devices:

1.

Provide
necessary test equipment required for reliable testing.

2.

Provide evidence of recent calibration of test equipment by a testing
agency acceptable to authorities having jurisdiction.

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3.

Schedule test with the Agency, through the CM, before connecting
anchorage d
evice to restrained component (unless post
-
connection
testing has been approved), and with at least seven days' advance
notice.

4.

Obtain CM's approval before transmitting test loads to the structure.
Provide temporary load
-
spreading members.

5.

Test at least f
our of each type and size of installed anchors and
fasteners selected by Engineer.

6.

Test to 90 percent of rated proof load of device.

7.

If a device fails the test, modify all installations of same type and
retest until satisfactory results are achieved.

8.

Recor
d test results.

B.

Changes: only as approved by the CM

1.

Submit calculations documenting the capability of the revised
support, hangar, and anchorage system can adequately restrain the
equipment, conduit, cable tray and bus duct systems during the
seismic even
t, signed and sealed by a Professional Engineer
registered in the State of Missouri.

3.08

TRAINING

A.

Provide manufacturer’s direct representative for on
-
site consultation and
to train appropriate Contractor personnel during
initial

start
-
up of drilled
-
in
anchoring. Distributor or agent not permitted. Do not proceed with
installation of drilled
-
in anchors without complete understanding of the
manufacturer’s published installation instructions by installation personnel
and a copy of the published procedure
s on
-
site at the time of installation.

END OF SECTION
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