Amendment 0004 23 05 48.00 40.pdf

P415 F-35A SQUADRON OPERATIONS/AMU FACILITY AND EPROJECT NO: 1651220

P396 F-35A FLIGHT SIMULATOR FACILITY EPROJECT NO: 1651221

SECTION 23 05 48.00 40

VIBRATION AND SEISMIC CONTROLS FOR HVAC PIPING AND EQUIPMENT

08/15

PART 1 GENERAL

Section 23 30 00 HVAC AIR DISTRIBUTION applies to work specified in this section to the extent applicable.

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.

ACOUSTICAL SOCIETY OF AMERICA (ASA)

ASA S2.71 (1983; R 2006) Guide to the Evaluation of Human Exposure to Vibration in Buildings

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE HVAC APP IP HDBK (2016) HVAC Applications Handbook, I-P Edition

NATIONAL ENVIRONMENTAL BALANCING BUREAU (NEBB)

NEBB PROCEDURAL STANDARDS (2015) Procedural Standards for TAB (Testing, Adjusting and Balancing) Environmental Systems

1.2 ADMINISTRATIVE REQUIREMENTS

Within ten working days of Contract Award, submit equipment and performance data for vibration isolator systems including equipment base design; inertia-block mass relative to support equipment weight; spring loads and free, operating, and solid heights of spring; spring diameters;

nonmetallic isolator loading and deflection; disturbing frequency; natural frequency of mounts; deflection of working member; and anticipated amount of physical movement at the reference points.

Ensure the data includes information on the following:

a. Mountings

b. Bases

c. Isolators

d. Floor-Mounted Piping

e. Vertical Piping

Five working days prior to commencement of installation, submit installation drawings for vibration isolator systems including equipment and performance requirements.

Amendment 0004 SECTION 23 05 48.00 40 Page 1

Indicate within outline drawings for vibration isolator systems, overall physical features, dimensions, ratings, service requirements, and weights of equipment.

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. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29.00 25 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Installation Drawings; G

Outline Drawings; G

SD-03 Product Data

Equipment and Performance Data; G

SD-06 Test Reports

Type of Isolator; G

Type of Base; G

Allowable Deflection; G

Measured Deflection; G

1.4 QUALITY CONTROL

Ensure all vibration-control apparatus is the product of a single manufacturing source, where possible. Human exposure levels should be considered using ASA S2.71 and NEBB PROCEDURAL STANDARDS.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Scheduled isolation mounting is in inches and is a minimum static deflection.

Spans referred to in paragraph EQUIPMENT, means longest bay dimension.

Determine exact mounting sizes and number of isolators by the isolator manufacturer based on equipment that will be installed. Check equipment revolutions per minute (rpm) and spring deflections to verify that resonance cannot occur.

2.1.1 Design Requirements

Design for vibration isolation using ASHRAE HVAC APP IP HDBK, Chapter 48, as applicable to the following sections.

SECTION 23 05 48.00 40 Page 2

2.1.1.1 Mountings

Provide the following mountings:

Type A: Composite pad, with 0.25-inch thick elastomer top and bottom layers, molded to contain a pattern with nonslip characteristics in all horizontal directions. Elastomer loading is not to exceed 40 pounds per square inch (psi). Ensure minimum overall thickness is 1 inch. Maximum deflections up to 0.25-inch are allowed.

Type B: Double rubber-in-shear with molded-in steel reinforcement in top and bottom. Maximum deflections up to 0.50-inch are allowed.

Type C: Free-standing laterally stable open-spring type for deflections over 0.50-inch, with built-in bearing and leveling provisions, 0.25-inch thick Type A base elastomer pads, and accessories. Ensure outside diameter of each spring is equal to or greater than 0.9 times the operating height of the spring under rated load.

Type D: Partially housed type, containing one or more vertically restrained springs with at least 0.50-inch clearance maintained around springs, with adjustable limit stops, 0.25-inch thick Type A base elastomer pads, and accessories.

2.1.1.2 Bases

Provide the following bases:

Type U: Unit isolators without rails, structural-steel bases, or inertia blocks.

Type R: Rails, connected mill-rolled structural steel, of sufficient dimension to preclude deflection at midpoint of unsupported span in excess of 1/1,440th of the span between isolators, power transmission, component misalignment, and any overhung weight. Where Type R bases are specified and the equipment proposed requires additional base support, use a Type S base.

Type S: Structural-steel bases common to a supported assembly, made from welded-joint mill-rolled structural steel with closed-perimeter configuration, isolators attached to outrigger supports.

Ensure height of steel members is sufficient to provide stiffness required to maintain equipment manufacturer's recommended alignment and duty efficiency of power-transmission components. Ensure height of steel member does not result in member deflection at midpoint of unsupported span of more than 1/1,440th of the span between isolators. Minimum height is 5-inches.

Type CIB: Provide concrete inertia blocks common to the entire assembly, with welded-joint construction, mill-rolled structural-steel perimeters, welded-in No. 4 reinforcing bars 8-inches on center each way near the bottom of the block, outrigger-isolator mounting provisions, anchor bolts. Fill with 3,000 psi cured-strength concrete.

Configure rectangular inertia bases to accommodate equipment supported.

Ensure minimum thickness of inertia base, in addition to providing

SECTION 23 05 48.00 40 Page 3 suitable mass, is sufficient to provide stiffness to maintain equipment manufacturer's recommended alignment and duty efficiency of power-transmission components, and is sufficient to result in base deflection at midpoint of unsupported span of not more than 1/1,440th of the span between isolators. Verify minimum thickness, the preceding requirements not withstanding, is 8 percent of the longest base dimension.

Ensure pumps with flexible couplings do not have inertia base less than 8-inches thick, and the minimum mass of concrete inertia block is equal in weight to supported equipment.

2.2 EQUIPMENT

Vibration isolation design per ASHRAE HVAC APP IP HDBK, Chapter 37.

2.2.1 Centrifugal Water Chiller Package Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Hermetic A-U-0.25 B-U-0.50 D-S-1.75 D-S-2.5

Open Type B-U-0.38 D-U-1.0 D-CIB-1.75 D-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.2 Reciprocating Water Chiller Package Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

500 to 750 rpm D-U-1.0 D-U-1.5 D-S-2.5 D-CIB-2.75

750 rpm and Over D-U-1.0 D-U-1.0 D-R-2.0 D-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.3 Absorption Water Chiller Package Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Standard A-U-0.25 D-U-1.0 D-U-1.5 D-U-2.75

SECTION 23 05 48.00 40 Page 4

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.1 Reciprocating and Scroll Compressor/Condenser Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

500 to 750 rpm D-U-1.0 D-U-1.5 D-U-2.5 D-CIB-2.75

750 rpm and Over D-U-1.0 D-U-1.0 D-U-2.0 D-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.2 Reciprocating Refrigeration Compressor Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

500 to 750 rpm C-U-1.0 C-U-1.5 C-S-2.5 C-CIB-2.75

750 rpm and Over C-U-1.0 C-U-1.0 C-R-2.0 C-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.2 Centrifugal Pump Locations

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Close-couple through 5 hp

None -R-0.35 C-S-1.0 C-S-1.0

Bedplate-mounted through 5 hp

None C-CIB-1.0 C-CIB-1.5 C-CIB-1.75

7-1/2 hp None C-CIB-1.0 C-CIB-1.75 C-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

SECTION 23 05 48.00 40 Page 5

2.2.3 Air-Cooled Condensing Unit Locations

TYPE

EQUIPMENT

20-FOOT ROOF-SPAN

PROVISIONS*

30-FOOT ROOF-SPAN

PROVISIONS*

40-FOOT ROOF-SPAN

PROVISIONS*

Through 5 hp over 900 rpm

B-U-0.5 D-U-1.0 D-U-1.75

Over 5 hp to 500 rpm B-U-0.5 D-U-1.75 D-U-2.5

500 rpm and over B-U-0.5 D-U-1.0 D-U-1.75

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.4 Low-Pressure Suspended Air-Handling Unit (AHU) Locations

Vibration-isolation provisions apply to ceiling-suspended Air Moving and Conditioning Association Class A packaged central-station units.

TYPE

EQUIPMENT

20-FOOT ROOF-SPAN

PROVISIONS*

30-FOOT

ROOF-SPAN

PROVISIONS*

40-FOOT

ROOF-SPAN

PROVISIONS*

Through 5 hp F-U-1.0 F-U-1.0 F-U-1.0

7-1/2 hp and over 250 to 500 rpm

F-U-1.75 F-U-1.75 F-U-1.75

500 rpm and over F-U-1.0 F-U-1.25 F-U-1.55

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.3 Low-Pressure AHU Locations

Vibration-isolation provisions apply to floor-mounted Air Moving and Conditioning Association Class A packaged central-station units.

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Through 5 hp B-U-0.35 C-U-1.0 C-U-1.0 C-U-1.0

7-1/2 hp and over 250 to 500 rpm

B-U-0.35 C-U-1.75 C-U-1.75 C-U-1.75

500 rpm B-U-0.35 C-U-1.0 C-U-1.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.4 Medium- and High-Pressure AHU Locations

Vibration-isolation provisions apply to floor-mounted Air Moving and Conditioning Association Classes B and C packaged central-station units.

SECTION 23 05 48.00 40 Page 6

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Through 20 hp 250 to 300 rpm

B-U-0.35 C-U-2.5 C-U-2.5 C-U-3.5

300 to 500 rpm B-U-0.35 C-U-1.75 C-U-1.75 C-U-2.5

500 rpm and over B-U-0.35 C-U-1.0 C-U-1.0 C-U-1.75

Over 20 hp 250 to 300 rpm

B-U-0.35 C-U-2.5 C-CIB-3.5 C-CIB-3.5

300 to 500 rpm B-U-0.35 C-U-2.5 C-CIB-2.5 C-CIB-3.5

500 rpm and over B-U-0.35 C-U-1.0 C-CIB-1.75 C-CIB-2.5

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.4 Air-Moving Device Locations

Vibration-isolation provisions apply to housed free-standing fans of any pressure rating, located in field-erected factory-fabricated central-station units.

TYPE

EQUIPMENT

BASEMENT

BELOW-GRADE

PROVISIONS*

ON/ABOVE

GRADE

20-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

30-FOOT

FLOOR-SPAN

PROVISIONS*

ON/ABOVE

GRADE

40-FOOT

FLOOR-SPAN

PROVISIONS*

Through 20 hp 250 to 300 rpm

B-U-0.35 C-S-2.5 C-S-2.5 C-S-3.5

300 to 500 rpm B-U-0.35 C-S-1.75 C-S-1.75 C-S-2.5

500 rpm and over B-U-0.35 C-S-1.0 C-S-1.5 C-S-1.75

*TYPE OF MOUNTING, BASE, AND MINIMUM DEFLECTION IN INCHES

2.2.5 Pipe And Duct Vibration Isolation

Type G: Provide isolators with in-series contained steel springs and preformed fibrous-glass or chloroprene-elastomer elements for connecting to building-structure attachments. Load devices by supported system during operating conditions to produce a minimum spring and elastomer static deflection of 1-inch and 3/8-inch, respectively.

2.2.5.1 Floor-Mounted Piping

Type K: Provide isolators with springs mounted on floor-supported columns or directly on the floor. Load devices by supported system during operating conditions to produce a minimum spring static deflection of 1-inch.

SECTION 23 05 48.00 40 Page 7

2.2.5.2 Vertical Piping

Type L: Provide isolators which are pipe base-support devices with one or more contained steel springs. Load devices by supported system during operating conditions to produce a minimum static deflection of 1-inch. Equip devices with precompression and vertical-limit features, as well as a minimum 1/4-inch thick elastomer sound pad and isolation washers, for mounting to floor.

2.3 MATERIALS

Ensure rubber is natural rubber and elastomer is chloroprene. Shore A durometer measurement of both materials and range between 40 and 60.

Inorganic materials such as precompressed, high-density, fibrous glass encased in a resilient moisture-impervious membrane may be used in lieu of specified natural rubber and elastomers. Where this substitution is made, ensure specified deflections are modified by the manufacturing source to accommodate physical characteristics of inorganic materials and to provide equal or better vibration isolation.

Ensure weather-exposed metal vibration-isolator parts are corrosion protected. Chloroprene coat springs.

2.4 TESTS, INSPECTIONS, AND VERIFICATIONS

Submit test reports for testing vibration isolation for each type of isolator and each type of base. Meet referenced standards contained within this section. Include in test reports allowable deflection and measured deflection also meeting referenced standards within this section.

PART 3 EXECUTION

3.1 INSTALLATION

Install equipment in accordance with manufacturer's recommendations.

-- End of Section --

SECTION 23 05 48.00 40 Page 8