26 05 48.00 10 SEISMIC PROTECTION FOR ELECTRICAL EQUIPMENT.doc

NOTE: This guide specification covers the requirements for insulated wire and cable for use on hydraulic structures, except for wire and cable for special applications, such as low-level circuits for analog signals, data and supervisory control, communication and telemetering systems.

Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.

Remove information and requirements not required in respective project, whether or not brackets are present.

Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet.

Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).

SECTION 26 05 48.00 10

SEISMIC PROTECTION FOR ELECTRICAL EQUIPMENT

NOTE: This guide specification covers the requirements for seismic protection of electrical equipment, conduit, and exterior utilities..

Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.

Remove information and requirements not required in respective project, whether or not brackets are present.

Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet.

Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).

PART 1 GENERAL

NOTE: The intent of this specification is to provide for adequate resistance to lateral forces induced by earthquakes for electrical equipment and systems described herein. The design seismic lateral forces are in addition to the "normal" gravity forces (weight) acting on the components of a system. This guide specification will be used in conjunction with Section 13 48 00 SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT Equipment in the following seismic design categories do not require protection from seismic events (refer to UFC 3-310-04 for definition of categories A through F).

a. Equipment in Seismic Design Categories A and B.

b. Equipment in Seismic Design Category C when the importance factor is equal to 1.0.

c. Equipment in Seismic Design Categories D, E, and F that are mounted at 1.2 m (4 feet) or less above a floor level and weigh 1780 N (400 lbs) or less and are not critical to the continued operation of the structure.

d. Equipment in Seismic Design Categories C, D, E, and F weighing 95 N (20 lbs) or less or distribution systems weighing 7 N/m (5 lb/ft) or less.

This section can be used for bracing details of medical equipment by editing the specification accordingly.

1.1 REFERENCES

NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title.

Use the Reference Wizard's Check Reference feature when you add a RID outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates.

References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.

1.1.1 The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. Unless other wise noted, the latest published version and/or revision shall be used.

1.1.1.1 AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

a. AISC 325 Manual of Steel Construction

1.1.1.2 ASTM INTERNATIONAL (ASTM)

a. ASTM E 580 Application of Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels in Areas Requiring Moderate Seismic Restraint

1.1.1.3 U.S. DEPARTMENT OF DEFENSE (DOD)

a. UFC 3-310-04 Seismic Design for Buildings

1.1.1.4 UNDERWRITERS LABORATORIES (UL)

a. UL 1598 Luminaires

1.2 SUBMITTALS

NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control.

A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractor’s Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.

For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the "G" designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District Office (Engineering Division or other organization in the District Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office. Codes following the "G" typically are not used for Navy, Air Force, and NASA projects.

Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.

1.2.1 Government approval may be required on any of the following items. Items requiring submittals will be listed on the AF Form 66. Provide copies of all submittals per the requirements in Section 01 33 00, Submittal Procedures, or as listed on the AF Form 66.

1.2.2 SD-02 Shop Drawings

1.2.2.1 Lighting Fixtures in Buildings (Equipment Requirements)

a. Detail drawings along with catalog cuts, templates, and erection and installation details, as appropriate, for the items listed. Submittals shall be complete in detail; shall indicate thickness, type, grade, class of metal, and dimensions; and shall show construction details, reinforcement, anchorage, and installation with relation to the building construction.

1.2.2.2 SD-03 Product Data

a. Lighting Fixtures in Buildings

b. Equipment Requirements

c. Copies of the design calculations with the detail drawings. Calculations shall be stamped by a registered engineer and shall verify the capability of structural members to which bracing is attached for carrying the load from the brace.

1.2.2.3 Contractor Designed Bracing

a. Copies of the Design Calculations with the Drawings. Calculations shall be approved, certified, stamped and signed by a Registered Professional Engineer. Calculations shall verify the capability of structural members to which bracing is attached for carrying the load from the brace.

1.3 SYSTEM DESCRIPTION

1.3.1 General Requirements

NOTE: Designer should verify that specified details do not interfere with the performance of the cathodic protection system (when used) or of the vibration isolation systems.

For systems and equipment in buildings that have a performance objective higher than life-safety, the designer should show a "GA" classification for the items under SD-02 Shop Drawings in the SUBMITTALS paragraph. The Engineer of Record (EOR) should review the details of these essential systems and assess their impact on the structural supporting system of the essential building.

1.3.1.1 The requirements for seismic protection measures described in this section shall be applied to the electrical equipment and systems listed below. Structural requirements shall be in accordance with Section 13 48 00 Seismic Protection for Miscellaneous Equipment.

1.3.2 Electrical Equipment

NOTE: The designer must ensure that the list below includes all electrical items to be braced. Delete the items which are not part of the project and add items which are not included in the list.

For equipment and systems in buildings with a performance objective greater than life-safety, the designer should provide two separate lists of equipment and systems: 1) Items that are essential to the higher level of post-earthquake performance, and 2) Items that are not essential but are necessary to provide a life-safety level of earthquake protection.

1.3.2.1 Electrical equipment shall include the following items to the extent required on the drawings or in other sections of these specifications:

Control Panels

Air Handling Units

Pumps with Motors Switchgear

Light Fixtures

Unit Substations

Motor Control Centers Transformers

Switchboards (Floor Mounted) Storage Racks

Solar Heating Units

1.3.3 Electrical Systems

NOTE: The designer must list below all electrical systems which are to be installed or modified.

1.3.3.1 The electrical systems shall be installed as required on the drawings and other sections of these specifications and shall be seismically protected in accordance with this specification.

1.3.4 Contractor Designed Bracing

NOTE: Retain this paragraph when the Contractor will design the bracing. The designer will refer and/or modify the listings above or will list below the equipment and systems to receive seismic bracing. Delete this paragraph when all bracing details and locations are indicated on the drawings.

1.3.4.1 The Contractor shall design the bracing in accordance with UFC 3-310-03A and additional data furnished by the Contracting Officer. Resistance to lateral forces induced by earthquakes shall be accomplished without consideration of friction resulting from gravity loads. UFC 3-310-03A uses parameters for the building, not for the equipment in the building; therefore, corresponding adjustments to the formulas shall be required. Loadings determined using UFC 3-310-03A are based on strength design; therefore, AISC 325 shall be used for the design.

1.3.5 Conduits Requiring No Special Seismic Restraints

NOTE: Retain only those items found in the project for this list of conduits that do not require seismic restraints. For facilities designated as critical, hazardous, or essential, delete or make exceptions for conduits which will require seismic restraint.

1.3.5.1 Seismic restraints may be omitted from electrical conduit less than (2-1/2 inches) trade size. All other interior conduit, shall be seismically protected as specified.

1.4 EQUIPMENT REQUIREMENTS

NOTE: Seismic control does not guarantee that the equipment itself is rugged enough to survive earthquake shaking. When a piece of equipment is required to remain operational after an earthquake, the manufacturer should be consulted regarding the capabilities of the equipment to withstand seismic loading.

1.4.1 Rigidly Mounted Equipment

NOTE: Rigidly mounted equipment is defined as having a period of vibration of 0.06 seconds or less for the equipment plus its mounting. Equipment with a fundamental period greater than 0.06 seconds should be assumed to be flexibly mounted or nonrigid and designed in accordance with the next paragraph below.

List items that may require additional reinforcements (internally) to prevent permanent deformation, dislocations, separation of components, or other damage, which would render the equipment inoperative for significant periods of time following a seismic event and to meet the specified requirements (such as engine-driven generators, etc., which consist of a number of individual components built into an assembly by the manufacturers). For emergency generators include auxiliary items required for the generator to operate, such as battery racks and day tanks.

1.4.1.1 The following items of equipment are to be furnished under this contract shall be constructed and assembled to withstand the seismic forces specified in UFC 3-310-03A. Each item of rigid electrical equipment shall be entirely located and rigidly attached on one side only of a building expansion joint. Piping, electrical conduit, etc., which cross the expansion joint shall be provided with flexible joints that are capable of accommodating displacements equal to the full width of the joint in both orthogonal directions.

Engine-Generators

Substations

Transformers

Switch Boards and Switch Gears

Motor Control Centers

Free Standing Electric Motors

PART 2 PRODUCTS

NOTE: Appropriate materials for structural supports must be used in corrosive environments. Dissimilar metals must be isolated.

2.1 LIGHTING FIXTURE SUPPORTS

2.1.1 Lighting fixtures and supports shall conform to UL 1598.

2.2 SWAY BRACING MATERIALS

2.2.1 Sway bracing materials (e.g. rods, plates, rope, angles, etc.) shall be as specified in Section 13 48 00 Seismic Protection for Miscellaneous Equipment.

PART 3 EXECUTION

3.1 SWAY BRACES FOR CONDUIT

3.1.1 Conduit shall be braced as for an equivalent weight pipe in accordance with Section 13 48 00.00 10 Seismic Protection for Miscellaneous Equipment..

3.2 LIGHTING FIXTURES IN BUILDINGS

3.2.1 Lighting fixtures and supports shall conform to the following:

3.2.2 Pendant Fixtures

a. Pendant fixtures shall conform to the requirements of UFC 3-310-03A.

3.2.2.2 Ceiling Attached Fixtures

a. Each luminaire shall be securely and independently supported from the structural members and/or structural deck. In no case shall any luminaire be solely supported from a plaster ceiling, gypsum board ceiling, acoustical ceiling, conveyance system, ductwork, piping, etc. Recessed, down lights mounted in acoustical ceilings shall be installed using the appropriate T-bar mounting bracket. Provide support of all lighting fixtures based on the latest addition of the Uniform Building Code and National Electrical Code. Provide separate, distinct, colored hanger wires independent of any ceiling suspension wires to support all electrical appurtenances above ceiling, such as light fixtures, etc. Wire color shall be either “international orange’ or “chromate yellow”.

3.2.2.3 Recessed Fluorescent Fixtures

a. Recessed fluorescent individual or continuous-row mounted fixtures shall be supported by a seismic-resistant suspended ceiling support system built in accordance with ASTM E 580. Seismic protection for the fixtures shall conform to the requirements of UFC 3-310-03A. Fixture accessories, including louvers, diffusers, and lenses shall have lock or screw attachments.

3.2.2.4 Surface-Mounted Fluorescent Fixtures

a. Surface-mounted fluorescent individual or continuous-row fixtures shall be attached to a seismic-resistant ceiling support system built in accordance with ASTM E 580. Seismic protection for the fixtures shall conform to the requirements of UFC 3-310-03A.

3.2.2.5 Assembly Mounted on Outlet Box

a. A supporting assembly, that is intended to be mounted on an outlet box, shall be designed to accommodate mounting features on (4 inch) boxes, plaster rings, and fixture studs.

3.2.3 Wall-Mounted Emergency Light Unit

3.2.3.1 Attachments for wall-mounted emergency light units shall be designed and secured for the worst expected seismic disturbance at the site.

3.2.4 Lateral Force

3.2.4.1 Structural requirements for light fixture bracing shall be in accordance with Section 13 48 00 Seismic Protection for Miscellaneous Equipment.

END OF SECTION 26 05 48.00 10

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