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READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 15: MECHANICAL]{.underline}

SECTION 15245 ‑ VIBRATION ISOLATION

USE: Furnishing and installing the vibration isolating mountings and
hangers for piping air handling units, and all other reciprocating or
rotating equipment.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs or subparagraphs are not
applicable, the articles, paragraphs or subparagraphs should be deleted;
when necessary, reletter or renumber articles, paragraphs or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1A: Select applicable words.

B. 1.1B: Select or add applicable specification sections. Do not list
specification sections from Division 15.

C. 1.2B: Insert number of copies of the manufacturer\'s descriptive data
required. Normally 5 copies are required. Distribution after review is
normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to
the project file.

D. 1.2C: Insert number of copies of the manufacturer\'s installation
instructions required. Normally 5 copies are required. Distribution
after review is normally 1 copy to the COR, 3 copies to the Contractor,
and 1 copy to the project file.

E. 1.2D: Insert number of copies of shop drawings required. Normally 5
copies are required. Distribution after review is normally 1 copy to the
COR, 3 copies to the Contractor, and 1 copy to the project file.

F. 1.2E: Insert number of copies of performance data required. Normally
5 copies are required. Distribution after review is normally 1 copy to
the COR, 3 copies to the Contractor, and 1 copy to the project file.

G. 4.1 and 4.2: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this section.
Measurement and payment will be addressed in Part 4 of Section 01010
-Summary of Work.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 01/94

SECTION 15241

VIBRATION ISOLATION

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Section Includes: \[Furnishing\] \[and\] \[Installing\] the vibration
isolation system.

1.2 SUBMITTALS:

A. General: Submittals shall be according to Section 01300 - Submittals.

B. Manufacturer\'s Literature: Submit \[[ ]{.underline}\] copies of the
manufacturer\'s descriptive data for isolation mounting deflections and
isolation efficiencies; spring diameters, compressed spring heights at
rated load, solid spring height; equipment weight \[equipment operating
speeds\] to be used on this project.

C. Installation Instructions: Submit \[[ ]{.underline}\] copies of the
manufacturer\'s installation instructions for the vibration isolation
system to be used on this project.

D. Shop Drawings: Submit \[\_\_\_\_\] copies of shop drawings for
mounting, vibration isolators, and hardware \[the following items\] to
be used on this project. \[A bill of materials shall be furnished with
the shop drawings.\] Drawings shall be \[same\] \[larger\] scale as the
full size Contract Drawings.

E. Performance Data: Submit \[[ ]{.underline}\] copies of engineering
data showing the performance characteristics of the vibration isolators
to be used on this project.

[PART 2: PRODUCTS]{.underline}

2.1 GENERAL:

A. Efficiency: Isolators shall be selected for a minimum of 90 percent
isolation, unless indicated otherwise.

B. Mounting:

1\. Air handling units, air and refrigeration compressors, floor or wall
mounted fans shall be mounted on isolators selected for an efficiency
based on the basic speed of fan or compressor.

2\. Spring isolation systems shall utilize springs with the spring
diameter not less than 0.8 of the loaded operating height of the spring.
Each spring isolator shall be designed and installed so that the ends of
the spring remain parallel during and after installation. Springs shall
have reserve deflection from loaded operating height to solid, equal to
50 percent of minimum specified deflection.

3\. Mounting Sizes shall be determined by the isolator manufacturer.

C. Support of Piping and Suspended Fans:

1\. Piping within 20 feet of and connected to rotating equipment and
fans suspended from overhead shall be resiliently supported.

2\. Piping hanger rod isolators shall contain a steel spring in series
with a one‑fourth‑inch acoustical neoprene pad within a steel box
retainer. The hanger rod isolator assembly shall be rigidly supported
one end from the building structure. The installed hanger rod supported
from the spring sub‑assembly shall not contact the steel box retainer
and clearances in the isolator design shall be capable of accepting a
15‑degree misalignment in any direction from the vertical.

D. Centrifugal Pumps:

1\. Vibration isolation bases not required.

[PART 3: EXECUTION]{.underline}

3.1 INSTALLATION:

A. Foundations:

1\. All equipment, piping, shall be mounted on or suspended from
approved foundations and supports, as specified herein and as shown on
the drawings.

2\. For equipment, provide concrete foundations, pads and supports, and
reinforcing. Contractor shall furnish shop drawings for approval,
showing adequate concrete reinforcing steel details and templates for
all concrete foundations and supports, and all required hanger bolts and
other appurtenances necessary for the proper installation of equipment.

3\. All floor‑mounted equipment shall be erected on minimum four inch
high concrete pads over the complete floor area of the equipment unless
noted otherwise. Wherever vibration eliminating devices are specified
hereinafter, these items shall, in all cases, be mounted upon minimum
four inch high concrete pads unless noted otherwise. Concrete pads shall
be poured directly on or with the structural slab.

B. Equipment:

1\. Vibration isolators shall be installed according to the
manufacturer\'s instructions.

2\. Vibration isolation system for each item of floor and ceiling
supported equipment shall have a maximum lateral motion under equipment
start‑up or shut‑down conditions of one‑fourth inch. Motions in excess
shall be restrained by approved spring type mountings.

3\. Seal all around pipe and duct penetrations through walls, floor, and
ceilings of mechanical equipment rooms with oakum and mastic to make
airtight.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. The Contractor shall include consideration for this item
in the bid price for other items of the Contract.

END OF SECTION