Amendment 0008 SP330011B5003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICAITON NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicble)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICIATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 11)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a)By completing items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment your desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPIRATION DATA (If required)

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable

SP3300-11-B-5003

Amendment 0008

Amendment 0008 is hereby incorporated into solicitation SP3300-11-B-5003 and shall become part of any resulting contract.

Amendment 0008 is being issued to provide an answer to a vendor question.

Question 1: Does this project have seismic restraints. There is reference to seismic on drawings, but no spec. We would need category and zone to figure costs. This is a big ticket item!

Answer 1: Below are the seismic categories.

Category (use group) is Group III Seismic Design Category is A Location York County PA

Ss .197g S1 .054g Sds .131g Sd1 .036g

The general seismic specification section and discipline specific sections for mechanical and electrical are attached to this amendment. The general section is included as it is referenced by the mechanical and electrical sections.

All other terms and conditions remain unchanged.

END OF AMENDMENT 0008

TOC SPECIFICATIONS DDSP - NEW CUMBERLAND, PA

SECTION 13080 Page 1

SECTION 13080

SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASME INTERNATIONAL (ASME)

ASME B18.2.1

(1996) Square and Hex Bolts and Screws, Inch Series

ASME B18.2.2

(1987; R 1999) Square and Hex Nuts

ASTM INTERNATIONAL (ASTM)

ASTM A 153/A 153M

(2004) Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A 307

(2004) Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

ASTM A 325

(2004b) Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

ASTM A 36/A 36M

(2004) Carbon Structural Steel

ASTM A 500

(2003a) Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes

ASTM A 53/A 53M

(2004a) Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A 563

(2004a) Carbon and Alloy Steel Nuts

ASTM A 572/A 572M

(2004) High-Strength Low-Alloy Columbium- Vanadium Structural Steel

ASTM A 603

(1998; R 2003) Zinc-Coated Steel Structural Wire Rope

ASTM A 653/A 653M

(2004a) Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM E 488

(1996; R 2003) Strength of Anchors in Concrete and Masonry Elements

U.S. ARMY CORPS OF ENGINEERS (USACE)

SECTION 13080 Page 2

TI 809-04

(1998) Seismic Design for Buildings

1.2 SYSTEM DESCRIPTION

1.2.1 General Requirements

The requirements for seismic protection measures described in this section shall be applied to the mechanical equipment and systems outlined in Section 15070 SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT, the electrical equipment and systems outlined in Section 16070 SEISMIC PROTECTION FOR ELECTRICAL EQUIPMENT, and the miscellaneous equipment and systems listed below.

Seismic protection requirements shall be in accordance with TI 809-04 and additional data furnished by the Contracting Officer, and shall be provided in addition to any other requirements called for in other sections of these specifications. The design for seismic protection shall be based on a Seismic Use Group I or II or IIIH or IIIE as indicated building occupancy and on site response coefficients for S<SBS>MS</SBS> = 20% as indicated and S<SBS>M1</SBS> = 7% as indicated. Resistance to lateral forces induced by earthquakes shall be accomplished without consideration of friction resulting from gravity loads. The basic force formulas, for Ground Motions A and B in Chapter 3 of TI 809-04

, use the design spectral response acceleration parameters for the performance objective of the building, not for equipment in the building; therefore, corresponding adjustments to the formulas shall be required.

1.2.2 Miscellaneous Equipment and Systems

The bracing for the following miscellaneous equipment and systems shall be developed by the A-E or Contractor as indicated in accordance with the requirements of this specification:

Storage cabinets Ornamentations Storage Racks Signs and Billboards Shelving Furnishings Partitions and other as indicated

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. The following shall be submitted in accordance with Section 01330

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Resilient Vibration Isolation Devices Bracing

Equipment Requirements

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. For equipment and systems in buildings that have a performance objective higher than

SECTION 13080 Page 3 life-safety, the drawings shall be stamped by the registered engineer who stamps the calculations required above.

SD-03 Product Data

Bracing

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.

1.4 EQUIPMENT REQUIREMENTS

1.4.1 Rigidly Mounted Equipment

The indicated specific items of equipment to be furnished under this contract shall be constructed and assembled to withstand the seismic forces specified in TI 809-04

, Chapter 10. For any rigid equipment which is rigidly attached on both sides of a building expansion joint, flexible joints for piping, electrical conduit, etc., units that are capable of accommodating displacements equal to the full width of the joint in both orthogonal directions, shall be provided.

1.4.2 Nonrigid or Flexibly-Mounted Equipment

The indicated specific items of equipment to be furnished shall be constructed and assembled to resist a horizontal lateral force as indicated times the operating weight of the equipment at the vertical center of gravity of the equipment.

PART 2 PRODUCTS

2.1 BOLTS AND NUTS

Squarehead and hexhead bolts, and heavy hexagon nuts, ASME B18.2.1, ASME B18.2.2, or ASTM A 307 for bolts and ASTM A 563 for nuts or ASTM A 325 for bolts and nuts as indicated. Bolts and nuts used underground and/or exposed to weather shall be galvanized in accordance with ASTM A 153/A 153M

2.2 SWAY BRACING

Material used for members listed in this section and on the drawings, shall be structural steel conforming with the following:

a. Plates, rods, and rolled shapes, ASTM A 36/A 36M or ASTM A 572/A 572M, Grade 503 as indicated. If the Contractor does the design, both ASTM A 36/A 36Mand ASTM A 572/A 572M

, grade 503 will be allowed.

b. Wire rope, ASTM A 603

c. Tubes, ASTM A 500

, Grade B, unless otherwise indicated.

d. Pipes, ASTM A 53/A 53M

, Type E or S as indicated, Grade B.

SECTION 13080 Page 4

e. Light gauge angles, less than 1/4 inch thickness, ASTM A 653/A 653M

, unless otherwise indicated.

PART 3 EXECUTION

3.1 BRACING

Bracing shall conform to the arrangements shown. Trapeze-type hanger shall be secured with not less than two 1/2 inch bolts.

3.2 BUILDING DRIFT

Sway braces for a piping run shall not be attached to two dissimilar structural elements of a building that may respond differentially during an earthquake unless a flexible joint is provided.

3.3 ANCHOR BOLTS

3.3.1 Cast-In-Place

Floor or pad mounted equipment shall use cast-in-place anchor bolts, except as specified below. Two nuts shall be provided on each bolt. Anchor bolts shall conform to ASTM A 307

. Anchor bolts shall have an embedded straight length equal to at least 12 times nominal diameter of the bolt. Anchor bolts that exceed the normal depth of equipment foundation piers or pads shall either extend into concrete floor or the foundation shall be increased in depth to accommodate bolt lengths.

3.3.2 Expansion or Chemically Bonded Anchors

Expansion or chemically bonded anchors shall not be used unless test data in accordance with ASTM E 488 has been provided to verify the adequacy of the specific anchor and application. Expansion or chemically bonded anchors shall not be used to resist pull-out in overhead and wall installations if the adhesive is manufactured with temperature sensitive epoxies and the location is accessible to a building fire. Expansion and chemically bonded anchors shall be installed in accordance with the manufacturer's recommendations. The allowable forces shall be adjusted for the spacing between anchor bolts and the distance between the anchor bolt and the nearest edge, as specified by the manufacturer.

3.3.2.1 General Testing

Expansion and chemically bonded anchors shall be tested in place after installation. The tests shall occur not more than 24 hours, unless otherwise indicated, after installation of the anchor and shall be conducted by an independent testing agency; testing shall be performed on random anchor bolts as described below.

3.3.2.2 Torque Wrench Testing

Torque wrench testing shall be done on not less than 50 percent of the total installed expansion anchors and at least one anchor, unless otherwise indicated, for every piece of equipment containing more than two anchors, unless otherwise indicated. The test torque shall equal the minimum required installation torque as required by the bolt manufacturer. Torque wrenches shall be calibrated at the beginning of each day the torque tests

SECTION 13080 Page 5 are performed. Torque wrenches shall be recalibrated for each bolt diameter whenever tests are run on bolts of various diameters. The applied torque shall be between 20 and 100 percent of wrench capacity. The test torque shall be reached within one half turn of the nut, except for 3/8 inch sleeve anchors which shall reach their torque by one quarter turn of the nut. If any anchor fails the test, similar anchors not previously tested shall be tested until 20 consecutive anchors pass, unless otherwise indicated.

Failed anchors shall be retightened and retested to the specified torque; if the anchor still fails the test it shall be replaced.

3.3.2.3 Pullout Testing

Expansion and chemically bonded anchors shall be tested by applying a pullout load using a hydraulic ram attached to the anchor bolt. At least 5 percent of the anchors unless otherwise indicated, but not less than 3, unless otherwise indicated, per day shall be tested. The load shall be applied to the anchor without removing the nut; when that is not possible, the nut shall be removed and a threaded coupler shall be installed of the same tightness as the original nut. The test setup shall be checked to verify that the anchor is not restrained from withdrawing by the baseplate, the test fixture, or any other fixtures. The support for the testing apparatus shall be at least 1.5 times the embedment length away from the bolt being tested. Each tested anchor shall be loaded to 1 times the design tension value for the anchor, unless otherwise indicated. The anchor shall have no observable movement at the test load. If any anchor fails the test, similar anchors not previously tested shall be tested until 20 consecutive anchors pass, unless otherwise indicated. Failed anchors shall be retightened and retested to the specified load; if the anchor still fails the test it shall be replaced.

3.4 RESILIENT VIBRATION ISOLATION DEVICES

Where the need for these devices is determined, based on the magnitude of the design seismic forces, selection of anchor bolts for vibration isolation devices and/or snubbers for equipment base and foundations shall follow the same procedure as in paragraph ANCHOR BOLTS, except that an equipment weight equal to five times, unless otherwise indicated, the actual equipment weight shall be used.

3.4.1 Resilient and Spring-Type Vibration Devices

Vibration isolation devices shall be selected so that the maximum movement of equipment from the static deflection point shall be 0.5 inches.

3.4.2 Multidirectional Seismic Snubbers

Multidirectional seismic snubbers employing elastomeric pads shall be installed on floor- or slab-mounted equipment. These snubbers shall provide

0.25 inches free vertical and horizontal movement from the static deflection point. Snubber medium shall consist of multiple pads of cotton duct and neoprene or other suitable materials arranged around a flanged steel trunnion so both horizontal and vertical forces are resisted by the snubber medium.

3.5 SWAY BRACES FOR PIPING

SECTION 13080 Page 6

Transverse sway bracing for steel and copper pipe shall be provided at intervals not to exceed those shown on the drawings. Transverse sway bracing for pipes of materials other than steel and copper shall be provided at intervals not to exceed the hanger spacing as specified in Section 15400 PLUMBING, GENERAL PURPOSE. Bracing shall consist of at least one vertical angle 2 x 2 inches x 16 gauge and one diagonal angle of the same size.

3.5.1 Longitudinal Sway Bracing

Longitudinal sway bracing shall be provided in accordance with Section

15070SEISMIC CONTROL FOR MECHANICAL EQUIPMENT.

3.5.2 Anchor Rods, Angles, and Bars

Anchor rods, angles, and bars shall be bolted to either pipe clamps or pipe flanges at one end and cast-in-place concrete or masonry insert or clip angles bolted to the steel structure on the other end. Rods shall be solid metal or pipe as specified below. Anchor rods, angles, and bars shall not exceed lengths given in the tabulation below.

3.5.3 Maximum Length for Anchor Braces

Maximum Length* Type Size (Inches) (Feet/Inches)

Angles 1-1/2 x 1-1/2 x 1/4 4-10 2 x 2 x 1/4 6-6 2-1/2 x 1-1/2 x 1/4 8-0 3 x 2-1/2 x 1/4 8-10 3 x 3 x 1/4 9-10

Rods 3/4 3-1 7/8 3-8

Flat Bars 1-1/2 x 1/4 1-2 2 x 1/4 1-2 2 x 3/8 1-9

Pipes (40S) 1 7-0 1-1/4 9-0 1-1/2 10-4 2 13-1

3.5.4 Bolts

Bolts used for attachment of anchors to pipe and structure shall be not less than 1/2 inch diameter.

3.6 EQUIPMENT SWAY BRACING

3.6.1 Suspended Equipment and Light Fixtures

Equipment sway bracing shall be provided for items supported from overhead floor or roof structural systems, including light fixtures. Braces shall consist of angles, rods, wire rope, bars, or pipes arranged as shown and secured at both ends with not less than 1/2 inch bolts. Sufficient braces

SECTION 13080 Page 7 shall be provided for equipment to resist a horizontal force as specified in Chapter 10 of TI 809-04 without exceeding safe working stress of bracing components. The Contractor shall provide, for approval, specific force calculations in accordance with Chapter 10 of TI 809-04 for the equipment in the project. Details of equipment bracing shall be submitted for acceptance. In lieu of bracing with vertical supports, these items may be supported with hangers inclined at 45 degrees directed up and radially away from equipment and oriented symmetrically in 90-degree intervals on the horizontal plane, bisecting the angles of each corner of the equipment, provided that supporting members are properly sized to support operating weight of equipment when hangers are inclined at a 45-degree angle.

3.6.2 Floor or Pad Mounted Equipment

3.6.2.1 Shear Resistance

Floor mounted equipment shall be bolted to the floor. Requirements for the number and installation of bolts to resist shear forces shall be in accordance with paragraph ANCHOR BOLTS.

3.6.2.2 Overturning Resistance

The ratio of the overturning moment from seismic forces to the resisting moment due to gravity loads shall be used to determine if overturning forces need to be considered in the sizing of anchor bolts. Calculations shall be provided to verify the adequacy of the anchor bolts for combined shear and overturning.

-- End of Section --

THIS PAGE LEFT INTENTIONALLY BLANK

SECTION 15070 Page 1

SECTION 15070

MECHANICAL SOUND, VIBRATION, AND SEISMIC CONTROL

1.1 REFERENCES

The publications listed below form a part of this specification to the

AIR-CONDITIONING AND REFRIGERATION INSTITUTE (ARI)

ARI 370

(2001) Sound Rating of Large Outdoor Refrigerating and Air-Conditioning Equipment

ARI 575

(1994) Method of Measuring Machinery Sound Within an Equipment Space

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 350

(1999) Load and Resistance Factor Design (LRFD) Specification for Structural Steel Buildings

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1/D1.1M

(2002) Structural Welding Code - Steel

ASTM INTERNATIONAL (ASTM)

ASTM A 123/A 123M

(2002) Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A 36/A 36M

(2003a) Carbon Structural Steel

ASTM C 94

(1994) Ready-Mixed Concrete

ASTM D 2240

(2003) Rubber Property - Durometer Hardness

ASTM D 471

(1998e1) Rubber Property - Effect of Liquids

ASTM E 84

(2004) Surface Burning Characteristics of Building Materials

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA Arch. Manual

(2003, 6th Ed) Architectural Sheet Metal Manual

SMACNA Industry Practice

(1975, 1st Ed) Accepted Industry Practice for Industrial Duct Construction

SECTION 15070 Page 2

1.2 RELATED REQUIREMENTS

The provisions of Section 15050 BASIC MECHANICAL MATERIALS AND METHODS apply to this section.

1.3 DEFINITIONS

1.3.1 Decibels dB

Measure of sound level. Decibels are referenced to either 20 uPa for sound pressure levels or one pW for sound power levels. dBA is the overall "A" weighted sound level.

1.3.2 Machinery

The vibration or noise producing equipment that must be isolated.

1.3.3 Manufacturer

The fabricator or supplier of vibration-isolation or seismic-protection materials and equipment. For mechanical equipment and machinery the term machinery manufacturer will be used.

1.3.4 Micropascal uPa

10 to the minus 6 power newtons per square meter.

1.3.5 Picowatt pW

10 to the minus 12 power watts.

1.4 SYSTEM DESCRIPTION

1.4.1 Spring Isolator Data

For each type and size of spring isolator, submit the spring outside diameter, deflection, operating spring height, unloaded spring height, solid spring height, the ratio of the outside diameter to the operating spring height, the load to deflection ratio of the springs, and weight and sizes of structural steel members.

1.4.2 Machinery Manufacturer's Sound Data

For each piece of indicated machinery to be vibration isolated, the calculated sound power test data or sound pressure test data as levels in dB in the eight octave bands between 63 and 8,000 Hz. Refer sound power levels to one pW and sound pressure levels to 20 uPa. Submit the overall "A" weighted scale sound pressure level in dB. Submit the standard test procedure used to obtain the sound power or pressure data for the applicable vibration isolation equipment size.

1.4.3 Machinery

For each item of machinery, compare spring static deflections with the specified minimum static deflection, to show that the calculated spring static deflections are not less than the minimum static deflections

SECTION 15070 Page 3 specified. Rated spring static deflections are not acceptable in lieu of calculated spring static deflections.

1.4.4 Machinery Over 300 Pounds

For machinery items over 300 pounds, provide calculations for shear, pull-up, primary overturning, and secondary overturning.

1.4.5 Machinery Vibration Criteria

TABLE 1A

Vibration Isolator Types and Minimum Static Deflection (MSD, inches) for 4-8 inch slab on grade and column supported.

Column Slab on earth 31-40 feet 41-50 feet Spacing and 0-30 feet

Equipment Type MSD Type MSD Type MSD _________ (Note (1)) (Note (1))

(Note (1))

Absorption SV-R 1.0 SV-R 1.75 SV-R 2.75 Refrigeration Machines

Centrifugal Chillers or Heat Pumps

Hermetic Type SV-B 1.75 SV-B 2.5 SV-B 3.5

Open Type SV-1 1.75 SV-I 2.5 SV-I 3.5

Reciprocating Air or Refrigeration Compressors

500 to 750 rpm S-R 1.75 S-R 2.5 S-R 3.5

751 rpm and up S-R 1.5 S-R 2.5 S-R 3.5

Reciprocating Chillers or Heat Pumps

500 to 750 rpm SV-R 1.75 SV-R 2.5 SV-R 3.5

751 rpm and up SV-R 1.5 SV-R 2.5 SV-R 3.5

Packaged Boilers SV 1.0 SV 2.5 SV-R 3.5

Closed Coupled Pumps

Up to 7-1/2 hp S-I 1.0 S-I 1.0 S-I 1.0

Over 7-1/2 hp S-I 1.5 S-I 2.5 S-I 2.5

SECTION 15070 Page 4

Base Mounted Pumps

Up to 20 hp S-I 1.5 S-I 2.5 S-I 2.5

20 to 75 hp S-I 1.5 S-I 2.5 S-I 3.5

Over 75 hp S-I 2.5 S-I 3.5 S-I 3.5

Cooling Towers and SV with deflections specified for centrifugal Evaporative Condensers blowers when springs are supported on beams.

Use selection listed for column supported floors with up to 30 foot column spacing when springs are located on columns or bearing walls

Factory Assembled Air Handling Equipment AH, AC and HV Units (Note (2))

Suspended Units

Up to 5 hp H 1.0 H 1.0 H 1.0

Over 5 hp Up to 400 rpm H 1.75 H 1.75 H 1.75 Over 401 rpm H 1.0 H 1.5 H 2.5

Floor Mounted Units

Up to 5 hp S 1.0 S 1.0 S 1.0

Over 5 hp Up to 400 rpm S-R 1.75 S-R 1.75 S-R 2.5 Over 401 rpm S-R 1.0 S-R 1.5 S-R 2.5

Centrifugal Blowers

175 - 224 rpm S-B 4.75 S-B 4.75 S-B 4.75 225 - 299 rpm S-B 3.75 S-B 4.75 S-B 4.75 300 - 374 rpm S-B 2.75 S-B 4.5 S-B 4.75 375 - 499 rpm S-B 2.5 S-B 3.5 S-B 4.5 Over 500 rpm S-B 1.75 S-B 2.5 S-B 3.5

Tubular Centrifugal and Axial Fans (Note (2))

SECTION 15070 Page 5

Suspended H with deflection specified for centrifugal blowers

Floor Mounted S-B with deflections specified for Arrangements 1 & 9 centrifugal blowers

Utility Fans (Note (2))

Suspended H with deflections specified for centrifugal blowers but not to exceed 2.75 inches

Floor-Mounted S-R with deflections not specified for centrifugal blowers but not to exceed 2.75 inches

High Pressure Fans HR recommended for minimizing undesirable (Over 6 Inch thrust effects Water-Column Static Pressure) and Other Machineries Producing Thrust (Note (2))

Internal Combustion Engines and Engine Driven Equip

750 rpm and S 1.5 S 2.5 S 3.5 over

Dimmer Banks and Transformers

Up to 1000 NM 0.35 NM 0.35 S 3.5 lbs.

Over 1000 lbs. SV 1.0 SV 1.0 SV 1.0

NOTES: (1) Equipment Vibration Isolation Schedule Designations (Hyphenated designations are combinations of the following:)

B - Welded structural steel bases.

H - Spring isolators (suspended equipment and piping). Where required, provide with adjustable preloading devices.

HR - Thrust restraints

I - Concrete inertia bases with steel forms.

NM - Neoprene mounts.

NP - Neoprene pads.

SECTION 15070 Page 6

R - Structural steel rail for equipment mounts.

S - Freestanding spring isolators (floor-mounted equipment).

SV - Freestanding spring isolators (floor-mounted equipment).

SX - Freestanding spring isolators with adjustable cushioned vertical stops and cushioned horizontal stops (floor-mounted equipment). Protected spring isolators SX may be substituted wherever S or SV is specified and shall meet all requirements.

(2) Fans

a. When fan motors are 75 hp or larger, use the deflection requirements for the next wider column spacing. Except for building slab on grade a minimum of 2.5 inches should be used unless larger deflections are specified in the centrifugal blower table.

b. Provide sway brace isolators for tubular centrifugal and axial fans when the fan pressure exceeds 4 inches water column.

c. Provide inertia bases for all fans in lieu of structural steel bases or rails specified above when the fan pressure exceeds 4 inches water column.

d. With attaching brackets, suspension spring isolators bridge between the structure and the thrust-producing machinery such as high-pressure fan. Both types H and HR normally provide reaction in tension, while types S, SV, and SX normally provide reaction in compression. Thrust restraints are low-cost and effective components available from manufacturers. Use thrust restraints to eliminate the need for or reduce the magnitude of inertia mass when the mass is only used to reduce the displacement effects of the thrust.

TABLE 1B

Class II Vibration Isolator Types and Minimum Static Deflection (MSD, inches) for basements below grade and floor slabs on earth

Equipment Type (Note (1))

MSD

Absorption Refrigeration NP 0.25 Machines NM 0.35

Centrifugal Chillers or Heat Pumps

Hermetic Type NP 0.25

NM 0.35

Open Type NM-I 0.35

SECTION 15070 Page 7

Reciprocating Air or Refrigeration Compressors

500 to 750 rpm S 1.0

751 rpm and up S 1.0

Reciprocating Chillers or Heat Pumps

500 to 750 rpm SV 1.0

751 rpm and up SV 1.0

Packaged Boilers NP 0.25

NM 0.35

Pumps

Closed Coupled NP 0.25

Up to 7 1/2 hp NM 0.35

Over 7 1/2 hp S-I 1.0

Base Mounted

Up to 20 hp S-I 1.0

20 to 75 hp S-I 1.0

Over 75 hp S-I 1.0

Cooling Towers and NP 0.25 Evaporative Condensers NM 0.35

Factory Assembled Air Handling Equipment AH, AC and HV Units (Note (2))

Suspended Units

Up to 5 hp H 1.0

Over 5 hp Up to 400 rpm H 1.75 Over 401 rpm H 1.0

Floor Mounted Units

Up to 5 hp NP 0.25

NM 0.35

Over 5 hp Up to 400 rpm NM 0.35

SECTION 15070 Page 8

Over 401 rpm NM 0.35

Centrifugal Blowers 175 - 224 rpm NM-B 0.35 225 - 299 rpm NM-B 0.35 300 - 374 rpm NM-B 0.35 375 - 499 rpm NM-B 0.35 Over 500 rpm NM-B 0.35

Tubular Centrifugal and Axial Fans (Note (2))

Suspended H with deflections specified for centrifugal blowers

Floor Mounted Arrangements 1 & 9 NM 0.35

Utility Fans (Note (2))

Suspended and H with deflections specified for centrifugal

Floor Mounted NM 0.35

High-Pressure Fans HR recommended for minimizing (Over 6 Inch undesirable thrust effects Water-Column Static Pressure) and Other Machines Producing Thrust (Note (2))

Internal Combustion Engines and Engine Driven Equip

750 rpm and over S 1.0

Dimmer Banks and Transformers

Up to 1000 lbs. NP 0.25

NM 0.35

Over 1000 lbs. SV 1.0

NOTES: Note (1) and Note (2) are same as for TABLE 1A.

Provide vibration isolators and seismic snubbers for mechanical and electrical machinery and associated piping and ductwork as indicated, to minimize transmission of vibrations and structure borne noise to the building structure or spaces or from the building structure to the machinery. Comply with the following vibration schedule.

SECTION 15070 Page 9

1.4.6 Machinery Airborne Sound Level Criteria

TABLE 2A

Sound Data Schedule

Equipment | Maximum Sound Power Level (dB)

Octave Band Level Center Frequency (Hz)

63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000

Air Handling Unit | 94 | 90 | 89 | 89 | 89 | 84 | 82 | 79 Make-Up Air Fan | 91 | 91 | 80 | 84 | 82 | 76 | 71 | 65 Air Conditioning Unit| 100 | 96 | 90 | 89 | 86 | 80 | 75 | 72 Boiler | 75 | 72 | 72 | 75 | 76 | 63 | 55 | 50 Chiller | 98 | 98 | 96 | 95 | 93 | 94 | 88 | 81 Cooling Tower | 110 | 110 | 105 | 102 | 98 | 95 | 92 | 87 Air Compressor | 90 | 89 | 92 | 93 | 92 | 92 | 90 | 81 Pump | 85 | 80 | 82 | 82 | 80 | 77 | 74 | 72 Fan | 55 | 50 | 48 | 47 | 48 | 46 | 42 | 37

1.4.6.1 Basic Criteria

For each piece of machinery in the human work environment, do not exceed the maximum airborne sound levels 84 dB A-weighted scale, continuous or intermittent, or 140 dB peak sound pressure-level, impact or impulse, noise.

1.4.6.2 Sound Data Schedule

TABLE 2A

Sound Data Schedule

Equipment | Maximum Sound Power Level (dB)

Octave Band Level Center Frequency (Hz)

63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000

Air Handling Unit | 94 | 90 | 89 | 89 | 89 | 84 | 82 | 79 Make-Up Air Fan | 91 | 91 | 80 | 84 | 82 | 76 | 71 | 65 Air Conditioning Unit| 100 | 96 | 90 | 89 | 86 | 80 | 75 | 72 Boiler | 75 | 72 | 72 | 75 | 76 | 63 | 55 | 50 Chiller | 98 | 98 | 96 | 95 | 93 | 94 | 88 | 81 Cooling Tower | 110 | 110 | 105 | 102 | 98 | 95 | 92 | 87

SECTION 15070 Page 10

Air Compressor | 90 | 89 | 92 | 93 | 92 | 92 | 90 | 81 Pump | 85 | 80 | 82 | 82 | 80 | 77 | 74 | 72 Fan | 55 | 50 | 48 | 47 | 48 | 46 | 42 | 37

1.4.7 Welding

AWS D1.1/D1.1M

1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control

Inertia bases

Machinery foundations and subbases

Platforms

Rails

Saddles

Isolators

Flexible connectors

Flexible duct connectors

Pipe guides

Seismic snubbers

Vertical stops

Thrust restraints

Machinery manufacturer's sound data

SD-05 Design Data

Inertia bases

Machinery bases

Platforms

Rails

SECTION 15070 Page 11

Saddles

Each item of machinery

Each item of machinery over 300 pounds

Submit design calculations for inertia bases, machinery bases, platforms, rails, and saddles, either by the machinery manufacturer for the recommended machinery mounting or by the vibration-isolation equipment manufacturer.

SD-06 Test Reports

Seismic snubbers

Equipment vibration tests

Equipment sound level tests

Protected spring isolators

SD-08 Manufacturer's Instructions

Vibration and noise isolation components

1.6 QUALITY ASSURANCE

1.6.1 Vibration Isolator Procurement

For each piece of machinery to be isolated from vibration, supply the inertia base, machinery base, platform, rails, saddles, vibration isolators, seismic snubbers, and other associated materials and equipment as a coordinated package by a single manufacturer or by the machinery manufacturer. Select isolators that provide uniform deflection even when machinery weight is not evenly distributed. This requirement does not include the flexible connectors or the hangers for the associated piping and ductwork.

1.6.2 Unitized Machinery Assemblies

Mounting of unitized assemblies directly on vibration isolation springs is acceptable if machinery manufacturer certifies that the end supports of the assemblies have been designed for such installation.

2.1 CORROSION PROTECTION FOR STEEL PARTS

ASTM A 123/A 123M

hot-dipped galvanized, or equivalent manufacturer standard coatings. Where steel parts are exposed to the weather, provide galvanized coating of at least 2 ounces of zinc per square foot of surface. Coat springs with neoprene.

2.2 NEOPRENE

ASTM D 471 and ASTM D 2240, Grade Durometer 40, 50, or 60, and oil resistant.

SECTION 15070 Page 12

2.3 FLOOR-MOUNTED ISOLATORS

2.3.1 Neoprene Isolation Pads

Provide pads at least 1/4 inch thick with cross-ribbed or waffle design.

For concentrated loads, provide steel bearing plates bonded or cold cemented to the pads.

2.3.2 Neoprene Isolators

Provide molded neoprene isolators having steel base plates with mounting holes and, at the top, steel mounting plates with mounting holes or threaded inserts. Provide elements of type and size coded with molded letters or color-coded for capacity identification. Embed metal parts completely in neoprene.

2.4 SPRING ISOLATORS AND PROTECTED SPRING ISOLATORS

Provide spring isolators or protected spring isolators that are adjustable and laterally stable with free-standing springs of horizontal stiffness at minimum 80 percent of the vertical (axial) stiffness. For machine-attached and floor-attached restraining elements, separate from metal-to-metal contact by neoprene cushions 1/8 inch thick minimum. Provide neoprene acoustic friction pads at least 1/4 inch thick.

2.4.1 Springs

Provide springs with base and compression plates, to keep spring ends parallel during and after deflection to operating height. Provide outside coil diameters at least 0.8 of the operating height. At operating height, springs shall have additional travel to complete (solid) compression equal to at least 50 percent of the operating deflection.

2.4.2 Mounting and Adjustment

Provide base and compression plates with mounting holes or threaded fittings. Bolt leveling adjustment bolts to machinery or base.

2.5 SUSPENSION ISOLATORS

Provide hangers with suspension isolators encased in open steel brackets.

Isolate hanger rods from isolator steel brackets with neoprene-lined opening.

2.5.1 Suspension Neoprene Isolators

Provide double-deflection elements with minimum 3/8 inch deflection.

2.5.2 Suspension Spring Isolators

Provide hangers with springs and molded neoprene elements in series. Provide isolators with adjustable spring-preloading devices where required to maintain constant pipe elevations during installation and when pipe operational loads are transferred to the springs.

SECTION 15070 Page 13

2.6 MACHINERY BASES, PLATFORMS, RAILS SADDLES

ASTM A 36/A 36M and AISC 350

2.7 INERTIA BASES

ASTM A 36/A 36M steel, ASTM C 94

(2,500 psi concrete.

2.8 FLEXIBLE CONNECTORS FOR PIPING

Straight or elbow flexible connectors rated for temperatures, pressures, and fluids to be conveyed. Provide flexible connectors with the strength 4 times operating pressure at highest system operating temperature. Provide elbow flexible connectors with a permanently set angle.

2.8.1 Elastomeric Flexible Connectors

Fabricated of multiple plies of tire cord fabric and elastomeric materials with integral reinforced elastomeric flanges with galvanized malleable iron back up rings.

2.8.2 Metal Flexible Connectors

Fabricated of Grade E phosphor bronze, monel or corrugated stainless steel tube covered with comparable bronze or stainless steel braid restraining and pressure cover.

2.9 FLEXIBLE DUCT CONNECTORS

Provide flexible duct connectors fabricated in accordance with SMACNA Industry Practice

2.10 SEISMIC SNUBBERS FOR EQUIPMENT

Factory-fabricated, omni-directional with factory set air gaps between 1/8 inch minimum and 1/4 inch maximum. Load capacity of each snubber at 50 percent neoprene element deflection shall be 0.5g minimum. Provide replaceable neoprene elements 3/4 inch minimum thickness.

2.11 PIPE GUIDES

Factory-fabricated. Weld steel bar guides to the pipe at a maximum radial spacing of 60 degrees. The outside diameter around the guide bars shall be smaller than the inside diameter of the guide sleeve in accordance with standard field construction practice. For pipe temperatures below 60 degrees F, provide metal sleeve, minimum one pound per cubic foot density insulation.

2.12 THRUST RESTRAINTS

Adjustable spring thrust restraints, able to resist the thrust force with at least 25 percent unused capacity. The operating spring deflection shall be not less than 50 percent of the static deflection of the isolation supporting the machinery.

SECTION 15070 Page 14

3.1 INSTALLATION

3.1.1 Vibration and Noise Isolation Components

Install vibration-and-noise isolation materials and equipment as indicated and in accordance with machinery manufacturer's instructions.

3.1.2 Suspension Vibration Isolators

Provide suspension isolation hangers for piping, suspended equipment, and suspended equipment platforms in mechanical equipment rooms, as indicated and as specified. For operating load static deflections of 1/4 inch or less, provide neoprene pads or single deflection neoprene isolators. For operating load static deflections over 5/16 to 3/8 inch, provide double-deflection neoprene element isolators. For operating load static deflections over 3/8 inch, provide isolators with spring and neoprene elements in series.

3.1.3 Vertical Stops

For machinery affected by wind pressure or having an operational weight different from installed weight, provide resilient vertical limit stops which prevent spring extension when weight is removed. Provide vertical stops for machinery containing liquid, such as water chillers, evaporative coolers, boilers, and cooling towers. Spring isolated or protected spring isolated machinery must rock and move freely within limits of stops or seismic restraint devices.

3.1.4 Thrust Restraints

Where required, provide pairs of thrust restraints, symmetrically installed on both sides of the steady state line of thrust.

3.1.5 Flexible Pipe and Duct Connectors

Install flexible connectors in accordance with the manufacturer's instructions. When liquid pulsation dampening is required, flexible connectors with spherical configuration may be used. Provide restraints for pipe connectors at pumps to prevent connector failure upon pump startup.

3.1.6 Seismic Snubbers

Provide snubbers as close as possible to each vibration isolator as indicated. After installing and leveling of the machinery, adjust snubbers in accordance with the snubber manufacturer's instructions.

3.1.7 Machinery

3.1.7.1 Stability

Isolators shall be stable during starting and stopping of machinery without traverse and eccentric movement of machinery that would damage or adversely affect the machinery or attachments.

3.1.7.2 Lateral Motion

SECTION 15070 Page 15

The installed vibration isolation system for each piece of floor or ceiling mounted machinery shall have a maximum lateral motion under machinery start up and shut down conditions of not more than 1/4 inch. Restrain motions in excess by approved spring mountings.

3.1.7.3 Unbalanced Machinery

Provide foundation suspension systems specifically designed to resist horizontal forces for machinery with large unbalanced horizontal forces.

Vibration isolator systems shall conform to the machinery manufacturer's recommendations.

3.1.7.4 Nonrotating Machinery

Mount nonrotating machinery in systems which include rotating or vibrating machinery on isolators having the same deflection as the hangers and supports for the pipe connected to.

3.1.7.5 Unitized Machinery Assemblies

TABLE 3A

Refrigeration Machines

Centrifugal Chillers or Heat Pumps

Hermetic Type SV-B 1.75 SV-B 2.5 SV-B 3.5

Open Type SV-1 1.75 SV-I 2.5 SV-I 3.5

Reciprocating Air or Refrigeration Compressors

500 to 750 rpm S-R 1.75 S-R 2.5 S-R 3.5

751 rpm and up S-R 1.5 S-R 2.5 S-R 3.5

Reciprocating Chillers or Heat Pumps

500 to 750 rpm SV-R 1.75 SV-R 2.5 SV-R 3.5

SECTION 15070 Page 16

751 rpm and up SV-R 1.5 SV-R 2.5 SV-R 3.5

Packaged Boilers SV 1.0 SV 2.5 SV-R 3.5

Closed Coupled Pumps

Up to 7 1/2 hp S-I 1.0 S-I 1.0 S-I 1.0

Over 7 1/2 hp S-I 1.5 S-I 2.5 S-I 2.5

Base Mounted Pumps

Up to 20 hp S-I 1.5 S-I 2.5 S-I 2.5

20 to 75 hp S-I 1.5 S-I 2.5 S-I 3.5

Over 75 hp S-I 2.5 S-I 3.5 S-I 3.5

Cooling Towers and SV with deflections specified for centrifugal Evaporative Condensers blowers when springs are supported on beams.

Use deflection listed for column supported floors with up to 30 foot column spacing when springs are located on columns or bearing walls

Factory Assembled Air Handling Equipment AH, AC and HV Units (Note (2))

Suspended Units

Up to 5 hp H 1.0 H 1.0 H 1.0

Over 5 hp Up to 400 rpm H 1.75 H 1.75 H 1.75 Over 401 rpm H 1.0 H 1.5 H 2.5

Floor Mounted Units

Up to 5 hp S 1.0 S 1.0 S 1.0

Over 5 hp Up to 400 rpm S-R 1.75 S-R 1.75 S-R 2.5 Over 401 rpm S-R 1.0 S-R 1.5 S-R 2.5

Centrifugal Blowers

175 - 224 rpm S-B 4.75 S-B 4.75 S-B 4.75

SECTION 15070 Page 17

225 - 299 rpm S-B 3.75 S-B 4.75 S-B 4.75 300 - 374 rpm S-B 2.75 S-B 4.5 S-B 4.75 375 - 499 rpm S-B 2.5 S-B 3.5 S-B 4.5 Over 500 rpm S-B 1.75 S-B 2.5 S-B 3.5

Tubular Centrifugal and Axial Fans (Note (2))

Suspended H with deflection specified for centrifugal blowers

Floor Mounted S-B with deflections specified for Arrangements 1 & 9 centrifugal blowers

Utility Fans (Note (2))

Suspended H with deflections specified for centrifugal blowers but not to exceed

2.75 inches

Floor-Mounted S-R with deflections not specified for centrifugal blowers but not to exceed

2.75 inches

High Pressure Fans HR recommended for minimizing undesirable (Over 6 Inch thrust effects Water-Column Static Pressure) and Other Machineries Producing Thrust (Note (2))

Internal Combustion Engines and Engine Driven Equip

750 rpm and S 1.5 S 2.5 S 3.5 over

Dimmer Banks and Transformers

Up to 1000 NM 0.35 NM 0.35 S 3.5 lbs.

Over 1000 lbs. SV 1.0 SV 1.0 SV 1.0

NOTES: (1) Equipment Vibration Isolation Schedule Designations (Hyphenated designations are combinations of the following:)

B - Welded structural steel bases.

SECTION 15070 Page 18

H - Spring isolators (suspended equipment and piping). Where required, provide with adjustable preloading devices.

HR - Thrust restraints

I - Concrete inertia bases with steel forms.

NM - Neoprene mounts.

NP - Neoprene pads.

R - Structural steel rail for equipment mounts.

S - Freestanding spring isolators (floor-mounted equipment).

SV - Freestanding spring isolators (floor-mounted equipment).

SX - Freestanding spring isolators with adjustable cushioned vertical stops and cushioned horizontal stops (floor-mounted equipment). Protected spring isolators SX may be substituted wherever S or SV is specified and shall meet all requirements.

(2) Fans

a. When fan motors are 75 hp or larger, use the deflection requirements for the next wider column spacing. Except for building slab on grade a minimum of 2.5 inches should be used unless larger deflections are specified in the centrifugal blower table.

b. Provide sway brace isolators for tubular centrifugal and axial fans when the fan pressure exceeds 4 inches water column.

c. Provide inertia bases for all fans in lieu of structural steel bases or rails specified above when the fan pressure exceeds 4 inches water column.

d. With attaching brackets, suspension spring isolators bridge between the structure and the thrust-producing machinery such as high-pressure fan. Both types H and HR normally provide reaction in tension, while types S, SV, and SX normally provide reaction in compression.

Thrust restraints are low-cost and effective components available from manufacturers. Use thrust restraints to eliminate the need for or reduce the magnitude of inertia mass when the mass is only used to reduce the displacement effects of the thrust.

Unitized assemblies such as chillers with evaporator and condenser, and top mounted centrifugal compressor or unitized absorption refrigeration machines, structurally designed with end supports, may be mounted on steel rails and springs in lieu of steel bases and springs. Where the slab or deck is less than 4 inches thick, provide spring isolation units with the

SECTION 15070 Page 19 deflection double that of the vibration isolation schedule, up to a maximum static deflection of 5 inches.

3.1.7.6 Roof and Upper Floor Mounted Machinery

TABLE 3A

Refrigeration Machines

Centrifugal Chillers or Heat Pumps

Hermetic Type SV-B 1.75 SV-B 2.5 SV-B 3.5

Open Type SV-1 1.75 SV-I 2.5 SV-I 3.5

Reciprocating Air or Refrigeration Compressors

500 to 750 rpm S-R 1.75 S-R 2.5 S-R 3.5

751 rpm and up S-R 1.5 S-R 2.5 S-R 3.5

Reciprocating Chillers or Heat Pumps

500 to 750 rpm SV-R 1.75 SV-R 2.5 SV-R 3.5

751 rpm and up SV-R 1.5 SV-R 2.5 SV-R 3.5

Packaged Boilers SV 1.0 SV 2.5 SV-R 3.5

Closed Coupled Pumps

Up to 7 1/2 hp S-I 1.0 S-I 1.0 S-I 1.0

Over 7 1/2 hp S-I 1.5 S-I 2.5 S-I 2.5

Base Mounted Pumps

Up to 20 hp S-I 1.5 S-I 2.5 S-I 2.5

SECTION 15070 Page 20

20 to 75 hp S-I 1.5 S-I 2.5 S-I 3.5

Over 75 hp S-I 2.5 S-I 3.5 S-I 3.5

Cooling Towers and SV with deflections specified for centrifugal Evaporative Condensers blowers when springs are supported on beams.

Use deflection listed for column supported floors with up to 30 foot column spacing when springs are located on columns or bearing walls

Factory Assembled Air Handling Equipment AH, AC and HV Units (Note (2))

Suspended Units

Up to 5 hp H 1.0 H 1.0 H 1.0

Over 5 hp Up to 400 rpm H 1.75 H 1.75 H 1.75 Over 401 rpm H 1.0 H 1.5 H 2.5

Floor Mounted Units

Up to 5 hp S 1.0 S 1.0 S 1.0

Over 5 hp Up to 400 rpm S-R 1.75 S-R 1.75 S-R 2.5 Over 401 rpm S-R 1.0 S-R 1.5 S-R 2.5

Centrifugal Blowers

175 - 224 rpm S-B 4.75 S-B 4.75 S-B 4.75 225 - 299 rpm S-B 3.75 S-B 4.75 S-B 4.75 300 - 374 rpm S-B 2.75 S-B 4.5 S-B 4.75 375 - 499 rpm S-B 2.5 S-B 3.5 S-B 4.5 Over 500 rpm S-B 1.75 S-B 2.5 S-B 3.5

Tubular Centrifugal and Axial Fans (Note (2))

Suspended H with deflection specified for centrifugal blowers

Floor Mounted S-B with deflections specified for Arrangements 1 & 9 centrifugal blowers

SECTION 15070 Page 21

Utility Fans (Note (2))

Suspended H with deflections specified for centrifugal blowers but not to exceed

2.75 inches

Floor-Mounted S-R with deflections not specified for centrifugal blowers but not to exceed

2.75 inches

High Pressure Fans HR recommended for minimizing undesirable (Over 6 Inch thrust effects Water-Column Static Pressure) and Other Machineries Producing Thrust (Note (2))

Internal Combustion Engines and Engine Driven Equip

750 rpm and S 1.5 S 2.5 S 3.5 over

Dimmer Banks and Transformers

Up to 1000 NM 0.35 NM 0.35 S 3.5 lbs.

Over 1000 lbs. SV 1.0 SV 1.0 SV 1.0

NOTES: (1) Equipment Vibration Isolation Schedule Designations (Hyphenated designations are combinations of the following:)

B - Welded structural steel bases.

H - Spring isolators (suspended equipment and piping).

Where required, provide with adjustable preloading devices.

HR - Thrust restraints

I - Concrete inertia bases with steel forms.

NM - Neoprene mounts.

NP - Neoprene pads.

R - Structural steel rail for equipment mounts.

SECTION 15070 Page 22

S - Freestanding spring isolators (floor-mounted equipment).

SV - Freestanding spring isolators (floor-mounted equipment).

SX - Freestanding spring isolators with adjustable cushioned vertical stops and cushioned horizontal stops (floor-mounted equipment). Protected spring isolators SX may be substituted wherever S or SV is specified and shall meet all requirements.

(2) Fans

a. When fan motors are 75 hp or larger, use the deflection requirements for the next wider column spacing. Except for building slab on grade a minimum of 2.5 inches should be used unless larger deflections are specified in the centrifugal blower table.

b. Provide sway brace isolators for tubular centrifugal and axial fans when the fan pressure exceeds 4 inches water column.

c. Provide inertia bases for all fans in lieu of structural steel bases or rails specified above when the fan pressure exceeds 4 inches water column.

d. With attaching brackets, suspension spring isolators bridge between the structure and the thrust-producing machinery such as high-pressure fan. Both types H and HR normally provide reaction in tension, while types S, SV, and SX normally provide reaction in compression.

Thrust restraints are low-cost and effective components available from manufacturers. Use thrust restraints to eliminate the need for or reduce the magnitude of inertia mass when the mass is only used to reduce the displacement effects of the thrust.

TABLE 3B

Class II Vibration Isolator Types and Minimum Static Deflection (MSD, inches) for basements below grade and floor slabs on earth

Equipment Type (Note (1))

MSD

Absorption Refrigeration NP 0.25 Machines NM 0.35

Centrifugal Chillers or Heat Pumps

Hermetic Type NP 0.25

NM 0.35

Open Type NM-I 0.35

Reciprocating Air or Refrigeration Compressors

SECTION 15070 Page 23

500 to 750 rpm S 1.0

751 rpm and up S 1.0

Reciprocating Chillers or Heat Pumps

500 to 750 rpm SV 1.0

751 rpm and up SV 1.0

Packaged Boilers NP 0.25

NM 0.35

Pumps

Closed Coupled NP 0.25

Up to 7 1/2 hp NM 0.35

Over 7 1/2 hp S-I 1.0

Base Mounted

Up to 20 hp S-I 1.0

20 to 75 hp S-I 1.0

Over 75 hp S-I 1.0

Cooling Towers and NP 0.25 Evaporative Condensers NM 0.35

Factory Assembled Air Handling Equipment AH, AC and HV Units (Note (2))

Suspended Units

Up to 5 hp H 1.0

Over 5 hp Up to 400 rpm H 1.75 Over 401 rpm H 1.0

Floor Mounted Units

Up to 5 hp NP 0.25

NM 0.35

Over 5 hp Up to 400 rpm NM 0.35 Over 401 rpm NM 0.35

Centrifugal Blowers

SECTION 15070 Page 24

175 - 224 rpm NM-B 0.35 225 - 299 rpm NM-B 0.35 300 - 374 rpm NM-B 0.35 375 - 499 rpm NM-B 0.35 Over 500 rpm NM-B 0.35

Tubular Centrifugal and Axial Fans (Note (2))

Suspended H with deflections specified for centrifugal blowers

Floor Mounted Arrangements 1 & 9 NM 0.35

Utility Fans (Note (2))

Suspended and H with deflections specified for centrifugal

Floor Mounted NM 0.35

High-Pressure Fans HR recommended for minimizing (Over 6 Inch undesirable thrust effects Water-Column Static Pressure) and Other Machines Producing Thrust (Note (2))

Internal Combustion Engines and Engine Driven Equip

750 rpm and over S 1.0

Dimmer Banks and Transformers

Up to 1000 lbs. NP 0.25

NM 0.35

Over 1000 lbs. SV 1.0

NOTES: Note (1) and Note (2) are same as for TABLE 3A.

On the roof or upper floors, mount machinery on isolators with vertical stops. Rest isolators on beams or structures designed and installed in accordance with the SMACNA Arch. Manual

, Plate 61.

3.1.8 Piping

SECTION 15070 Page 25

Provide vibration isolation and seismic snubbers for…