H35.REV

VIBRATION ISOLATION

NOTE: FINAL COPY: JUNE, 1988.

NOTE: THE INCLUDED SEISMIC RESTRAINT SPECIFICATIONS APPLY TO UNIFORM BUILDING CODE SEISMIC ZONE III LOCATIONS ONLY. BUILDING IN ZONE III AREAS MUST BE DESIGNED TO SAFELY ACCEPT EXTERNAL FORCES OF 0.5"g" FOR ALL RIGIDLY AND RESILIENTLY SUPPORTED EQUIPMENT, PIPING AND DUCTWORK WITHOUT FAILURE AND PERMANENT DISPLACEMENT OF THE EQUIPMENT. LIFE SAFETY EQUIPMENT SUCH AS FIRE PUMPS, SPRINKLER PIPING, EMERGENCY GENERATORS, ELEVATORS AND MACHINERY, MUST BE CAPABLE OF SAFELY ACCEPTING EXTERNAL FORCES OF UP TO 1.0"g" WITHOUT PERMANENT DISPLACEMENT OF THE SUPPORTED EQUIPMENT

NOTE: DELETE ALL REFERENCES TO SEISMIC RESTRAINTS IN UBC ZONES O AND I LOCATIONS. REFER TO CONSULTANT FOR OTHER AREAS

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work included in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for the following

1.	Vibration isolators.

2.	Foundations and supports.

3.	Seismic restraints.

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION No. 1 and Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECTION

B.	Related work in the following Sections:

1.	PIPING.

2.	CHILLED WATER SYSTEM.

3.	HOT WATER SYSTEM.

4.	FAN COIL SYSTEM.

5.	REFRIGERATION PLANT. (Centrifugal Units

6.	REFRIGERATION PLANT. (Absorption Units

7.	PACKAGED RECIPROCATING WATER CHILLERS. (Water Cooled

8.	CONDENSER WATER SYSTEM. (Packaged Cooling Towers

9.	AIR HANDLING SYSTEM EQUIPMENT.

10.	STEAM SYSTEM.

11.	PACKAGED ROOF TOP UNITS.

12.	PACKAGED AIR COOLED CHILLER.

13.	AIR COOLED CONDENSER.

14.	--------.

3)	REFERENCE STANDARDS

A.	Published Specifications standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable, national, state and local codes and refer to Section GENERAL PROVISIONS FOR HEATING, VENTILATING AND AIR CONDITIONING WORK for additional Reference Standards.

4)	QUALITY ASSURANCE

A.	The manufacturer shall determine vibration isolation and seismic restraint sizes and locations and provide piping and equipment isolation systems and seismic restraints as scheduled or specified

B.	The manufacturer shall also guarantee specified isolation system deflection, provide installation instructions and drawings and provide approved resilient restraining devices as required to limit equipment and piping motion in excess of 1/4 inch

C.	Refer to Section GENERAL PROVISIONS FOR HEATING VENTILATING AND AIR CONDITIONIG WORK for Guarantee and other Quality Assurance requirements

5)	SUBMITTALS

A.	Submittal material shall include --------- copies of descriptive data for all products and materials including but not limited to the following

1.	Descriptive data.

a.	Catalog cuts and data sheets in specific vibration isolators and restraints to be utilized showing compliance with the specification

b.	An itemized list showing items of equipment or piping to be isolated, isolator types, loading and deflection with reference to specific drawings

c.	Seismic restraint calculations.

2.	Shop drawings:

a.	Drawings showing equipment base constructions for each equipment, including dimensions, structural member sizes and support point locations

b.	Drawings showing methods of suspension, support guides for piping and ductwork

c.	Drawings showing methods for isolation of pipes and ductwork penetrating walls and slabs

d.	Anchor bolt locations.

e.	Reinforcing and template steels.

f.	Number and location of seismic restraints and anchors for each equipment, with specific details of restraints including maximum loading at each anchor bolt location

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Approved manufacturers for Vibration isolators and bases shall be Amber-Booth Co., Korfund Dynamics Corp., Mason Industries, Inc., Vibration Eliminator Co., Vibration Mountings and Controls, Inc. and Peabody Noise Control, Inc

2)	VIBRATION ISOLATION EQUIPMENT

A.	Vibration isolation equipment shall be the product of one manufacturer and where listed, references are to Mason Industries, Inc. (M.I.I.), Vibration Eliminator Co. (V.E.C.) and Vibration Mountings and Controls, Inc. (V.M.C.I.). Where exposed to atmosphere, all steel shall be hot dipped galvanized and hardware and springs shall be cadmium plated. Where exposed to corrosive elements, products shall be corrosion protected

3)	VIBRATION ISOLATORS:

A.	Spring type:

1.	Spring isolators shall incorporate the following:

a.	Minimum diameter of not less than 80 percent of the compressed spring height at rated load

b.	Corrosion resistance where exposed to corrosive environment with springs shall be cadmium plated and neoprene coated, hardware shall be cadmium plated and all other metal parts shall be hot dip galvanized

c.	Reserve deflection (from loaded to solid height) of 50 percent of rated deflection

d.	Leveling device.

e.	1/4 inch thick neoprene acoustical base pad.

f.	Designed and installed so that ends of springs remain parallel

g.	Adequate operating clearance.

h.	Non-resonant with equipment forcing frequencies or support structure natural frequencies

2.	Type "A" spring isolators shall be one of the following or equal: Type SLF - M.I.I. Type OSK - V.E.C. Type AN - V.M.C.I

3.	"Type "B" spring isolators shall be same as Type "A" except

a.	Provide built-in resilient vertical limit stops. Provide two layers of 1/4 inch neoprene base pad separated by 1/16 inch sheet steel. Tapped holes shall be in top plate for bolting to equipment. Isolators shall be capable of supporting equipment at a fixed elevation during equipment erection

YPE

b.	Type shall be one of the following or equal: Type SLR - M.I.I. Type KW - V.E.C. Type AWR - V.M.C.I

NOTE: APPLICABLE TO REFRIGERATION UNITS, ROOF MOUNTED UNITS, HOT WATER OR STEAM GENERATORS, ETC

4.	Where operating weight differs from installed weight, provide built-in adjustable limit stops to prevent equipment from rising when weight is removed. Stops shall not be in contact during normal operation

NOTE: INCORPORATES SEISMIC RESTRAINT.

a.	Spring isolators shall incorporate seismic restraint and be one of the following or equal: Type SSLR - M.I.I. Type BXL - V.E.C. Type SAWR : V.M.C.I

YPE

NOTE: HANGER ROD TYPE.

5.	Type "C" spring hanger rod isolators shall incorporate the following

a.	Spring element shall be seated on a steel washer within a neoprene cup, steel retainer box encasing the spring and neoprene cup, minimum 1/2 inch clearance between retainer box and spring hanger rod and factory preloading to 75 percent of rated load. Type shall be one of the following or equal: Type PCHS - M.I.I. Type SHP - V.M.C.I. Type PS - V.E.C

B.	Elastomer mounting types:

1.	Type "D" elastomer isolators shall incorporate bolt holes for bolting to equipment base, bottom steel plates for bolting to sub-base as required and unit type design moulded in black oil-resistant neoprene. Neoprene shall be compounded to be not greater than 70 durometer, minimum tensile strength 2000 psig, minimum elongation 300 percent and maximum compression set at 25 percent of the original deflection. Type shall be one of the following or equal: Type ND - M.I.I. Type 368SD - V.E.C. Type RD - V.M.C.I

NOTE: HANGER ROD TYPE.

2.	Type "E" elastomer hanger rod isolators shall incorporate a moulded unit type neoprene element, with compounding as described in Type "D" above, steel retainer box encasing neoprene mounting and clearance between mounting hanger rod and steel retainer box. Type shall be one of the following or equal: Type HD - M.I.I. Type CD - V.E.C. Type RHD - V.M.C.I

3.	Type "F" pad type elastomer mountings shall incorporate a 5/16 inch minimum thickness, 50 psig maximum loading, ribbed or waffled design, 1/16 inch deflection per pad thickness, 1/16 inch galvanized steel plate between multiple layers of pad thickness and suitable bearing plate to distribute load. Type shall be one of the following or equal: Type W - M.I.I. Type 200N - V.E.C. Type Shearflex - V.M.C.I

4.	Type "G" pad type elastomer mountings shall incorporate a laminated canvas duck and neoprene pad with maximum loading 1000 psig, suitable bearing plate to distribute load and minimum thickness one inch. Type shall be one of the following or equal: Type HL - M.I.I. Type Fabriflex - V.M.C.I

5.	Type "H" combination spring/elastomer hanger rod isolators shall incorporate spring and nepoprene isolator elements in a steel box retainer and characteristics of spring and neoprene as described in Type "C" and Type "E" hanger isolators.

6.	Type shall be one of the following or equal: Type 30N - M.I.I. Type SNRC - V.E.C. Type RSH-30A - V.M.C.

4)	EQUIPMENT BASES:

A.	Integral structural steel bases, Type "B-1": Provide steel base, reinforced as required to prevent base flexure at startup and misalignment of drive and driven units with fan bases complete with motor slide rails and drilled for drive and driven unit mounting template

B.	Concrete inertia base, Type "B-2": Provide inertia base made of a structural steel frame with structural base reinforced as required to prevent flexure, misalignment of drive and driven unit or stress transferral into equipment = Thickness per the following schedule: = Motor Sizes (HP) Min. Thickness inch. = 5 - 20 6 = 25 - 50 8 = 60 - 100 10 = 125 - 250 12 = 300 - 500 18

1.	Fan bases shall be complete with motor slide rails. Pump bases shall provide base elbow supports. Bases shall be complete with height saving brackets, reinforcing equipment, bolting provisions and isolators shall be provided by vibration control supplier. Base shall be ready for concrete pour

5)	FLEXIBLE CONNECTORS:

A.	Neoprene Type FC-1: Provide type manufactured of nylon tire cord and neoprene both molded and cured with hydraulic presses. Straight connectors shall have two spheres. Elbow shall have single sphere forming the corner of joint. Type shall be rated 150 psig at 220 deg F. Size 12 inch and larger to employ control cables with end fittings isolated from anchor plates by means of 1/2 inch bridge bearing. Provide neoprene washer bushings. Provide Mason Type MFNEC, MFTFU, or MFTNC, as required or as approved

NOTE: VERIFY THAT LENGTH IS SHOWN ON DRAWINGS.

B.	Flexible stainless hose, Type "FC-2": Provide braided flexible metal hose 2 inch pipe size and smaller with male nipple fittings and 2-1/2 inch and larger pipe size with fixed steel flanges suitable for operating pressure with 4:1 minimum safety factor. Length shall be as shown on drawings. Connectors shall be one of the following or equal: Type BBS - M.I.I. and Type MFP - V.M.C.I

NOTE: SEISMIC REQUIREMENT ONLY.

6)	SEISMIC RESTRAINTS

NOTE: COORDINATE WITH DRAWING SCHEDULES.

A.	Restraints shall be capable of safely accepting 0.5 "g" external forces without failure or 1.0 for life safety equipment. Restraints shall maintain equipment, piping, duct and pressure reducing boxes in a captive position and shall not short circuit vibration isolation systems or transmit objectionable vibration or noise during normal operation. Restraints shall be provided on all equipment as scheduled on drawings

B.	Spring-seismic restraint, Type I: Type shall comply with general characteristics of spring isolators shall incorporate snubbing restraint in all directions and shall be capable of supporting equipment at a fixed elevation during equipment erection. Type shall be one of the following or equal: Type SSLR - M.I.I., Type SAWR - V.M.C.I. and Type BXL - V.E.C

C.	Seismic restraint, Type II: Each corner or side seismic restraint shall incorporate minimum 1/4 inch thick resilient pad limit stops. Restraints shall be made of plate, structural members or square metal tubing in a welded assembly incorporating resilient pads

NOTE: COORDINATE DETAILS

D.	Seismic restraint, Type III: Provide metal cable type with approved end fastening devices to equipment and structure. See details on drawings

Part 3 -	EXECUTION

1)	INSTALLATION

A.	Install in accordance with manufacturer's instructions. Concrete shall be as per specifications describing requirements. For floor mounted equipment, provide 4 inch thick concrete housekeeping pads over entire floor area of floor supported equipment, supporting all vibration isolation devices and bases and keyed with hair pins as required to be integral with structural slab

NOTE: SEISMIC REQUIREMENT ONLY.

1.	Pads shall incorporate approved seismic restraint anchor plates flush with top of housekeeping pad. Pads shall be increased to 8 inch for chillers and boilers

B.	Equipment isolation and seismic control: Provide 2 inch operating clearance between concrete inertia bases and housekeeping pad and 1 inch clearance between equipment or structural bases and housekeeping pad. Isolation mounting deflection (minimum) shall be as specified or scheduled on drawings. Position equipment, structural base and concrete bases on blocks or wedges at proper operating height. Provide operating load conditions prior to transferring base isolator loads to springs and removing wedges

NOTE: SEISMIC REQUIREMENT ONLY.

1.	Position all corner or side seismic restraints with equipment operation for proper operating clearance and weld or bolt seismic restraint to seismic anchor plates in housekeeping pad. Install equipment with flexibility in wiring connection. Verify all installed isolators and mounting systems permit equipment motion in all directions. Adjust or provide additional resilient restraints to flexibly limit startup equipment lateral motion to 1/4 inch. Prior to startup, clean out all foreign matter between bases and equipment. Verify that there are no isolation short circuits in the base, isolators or seismic restraints

C.	For piping Isolation and Seismic Restraint, isolate piping outside of shafts as follows

1.	All water and steam piping in machine rooms.

2.	Piping where exposed on roof.

3.	Water and steam piping within 50 feet of connected rotating equipment and pressure reducing stations

4.	Steam pressure reducing stations including vertical floor supported header piping

5.	Compressed air piping from compressor discharge to receiver

D.	Position isolators close to building structure and between building structure and supplementary steel if required. Suspend isolators from rigid and massive support points. Supplementary steel shall be sized for a maximum deflection of 0.08 inches at center span. Vibration isolators must not cause any change of position of equipment or piping resulting in piping stresses or misaligment

NOTE: SEISMIC REQUIREMENT ONLY.

1.	Seismic restraint spacing shall be in accordance with hanger spacing. Provide seismic restraint for all piping in equipment rooms, on roof, in shafts and in ceilings of occupied spaces

a.	Support water and steam piping in shafts and floor supports entering shaft with Type "F" isolators (2 layers) or Type "G" pad depending on piping loads and support point space conditions within shafts. Provide guide and anchor piping in shafts as required with approved mounting designs incorporationg Type "G" pad to prevent direct contact of piping with building structure

b.	For steam piping, provide Type "E" hanger isolators with a minimum static deflection of 3/8 inches. Provide Type "D" isolators with a 3/8 inch minimum static deflection and suitable heat shield for floor supported piping and steam vertical headers

c.	For water piping, provide Type "H" hanger rod isolators with a minimum static deflection of 1 inch and factory preloading for piping greater than 6 inches diameter. Provide Type "B" isolators with 1 inch static deflection. Adjust, as required, all isolators to eliminate all contact of the isolated rod with the hanger rod box retainer or short circuiting of the spring

d.	For Control Air Piping, provide two flexible connectors Type "FC-2" 90 deg to each other in the comnpressor discharge piping to the receiver. When receiver is remote form compressor isolate piping between the compressor discharge and receiver with Type "C" isolator having 3/8 inch deflection. When receiver is remote from compressor, support receiver on Type "D" isolators having 3/8 inch deflection

NOTE: SEISMIC REQUIREMENT ONLY.

2.	Seismic Restraint Approvals: Submit calculations by a licensed structural engineer substantiating that equipment mountings and foundations and their seismic restraints can safely accept external forces of 0.5 "g" for all rigidly and resiliently supported equipment without failure and permanent displacement. Submit similar calculations for life safety equipment restraints for 1.0 "g" loading

E.	Install all isolated piping and ductwork so that they freely pass through walls and floors without rigid contacts. Penetration paints shall be sleeved and maintain 1 in. clearance around to be packed tightly with fiberglass and caulking after installation of piping and ductwork

1.	The contractor shall not install any equipment, piping or conduit which make rigid contact with the building constructions which include, but not limited to, slabs, beams, columns, studs and walls

2.	Coordinate work with other trades to avoid rigid contact. Inform other trades, such as plastering or electrical to avoid any short circuiting which would reduce vibration isolation

3.	Obtain inspection and approval of any installation to be covered or enclosed, prior to such closure

4.	Provide suitable and adequate flanged spool pieces between suction and discharge valves and the pump to permit future installation of flexible neoprene pipe connectors capable of accepting the operating working pressure

5.	Diagonal thrust restrainst shall consist of Type C hanger with the same deflection as specified for the supporting spring mounts. The sprig element shall be designed so it can be preset for thrust and adjusted to allow a maximum of 1/4 inch movement at start-up and shut-down of equipment

Part 4 -	INSPECTION

1)	On completion of installation of all noise, vibration and seismic control devices herein specified. The local representative of the isolation materials manufacturer shall inspect the completed systems and report in writing any installation error, improperly selected isolation devices, or other faults that could affect performance. Contractor shall submit a report indicating steps taken to properly complete the isolation work. Both of these reports shall be reviewed by the Engineers and Project Acoustical Consultant for final approved