Attachment_1_-MAHG171084_REPLACE_AHUS_6_7_9_13_B6901_SPEC.pdf

REPAIR/REPLACE AHUs 6, 7, 9 & 13 BRYAN HALL (B1203) 12 DECEMBER 2017

SECTION 22 00 01- MECHANICAL GENERAL PROVISIONS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. The general provisions of the Contract apply to the work specified in DIVISION 21, 22 and 23.

B. Separation of Divisions into Sections is for convenience only and is not intended to establish limits of work.

1.2 SCOPE

A. Provide labor, materials and equipment for complete and operating systems.

1.3 DRAWINGS

A. The drawings are diagrammatic and are intended to show the general arrangement and approximate physical sizes of equipment, piping and ductwork. Every nut, bolt, brace, hanger, etc., is not indicated or specified; all items required, necessary or incidental, for the proper and dependable operation of each system shall be provided under this Division whether specifically referred to or not. Refer to architectural drawings for all necessary dimensions.

1.4 CODES AND PUBLICATIONS

A. Work shall be executed in accordance with best engineering practices, guidelines, and the latest edition of all applicable Codes and Publications which shall include but shall not be limited to the following:

1. UFC

2. International Mechanical Code

3. International Plumbing Code

4. ASPE Data Book

5. ASHRAE Publications

6. Mississippi State Fire Marshal Act

7. SMACNA, Sheet Metal and Air Conditioning Contractors National Association

8. NFPA - 101, Life Safety Code and Publications

9. NFPA - 90A, Standard for the Installation of Air Conditioning & Ventilating Systems

10. NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning

Systems

10. NFPA - 70, National Electrical Code

B. Where the above are at variance with the drawings or specifications, the more stringent requirements shall be applicable.

1.5 REVIEW, PERMITS AND INSPECTIONS

A. Apply for and pay for governmental reviews and permits. Arrange for and pay inspection and service connection fees incidental to the mechanical work including the cost of utility main connections and extensions if required.

B. No work shall be concealed until approved by the local inspector and the Architect. Local regulations shall be adhered to.

C. Upon completion, a Certificate of Approval from the appropriate regulatory agency shall be provided to the Architect or Engineer.

1.6 VISITING SITE

A. The Bidder shall visit the site of proposed work so that he may understand the facilities, difficulties, and restrictions attending the execution of the Contract. He will be allowed no additional compensation for failure to be so informed.

1.7 WORK IN OTHER DIVISIONS

A. Prior to bidding, coordinate all items of work referred to as "work of other Divisions" to insure items are not omitted or duplicated.

B. Power wiring and raceways for mechanical equipment except power disconnect switches, will be provided under DIVISION 26 - ELECTRICAL. Mechanical equipment shall be provided with factory installed integral disconnects unless indicated otherwise on electrical drawings. If factory installed disconnects are not available and not indicated on electrical drawings, mechanical contractor shall coordinate requirements with electrical contractor, obtain written verification of contractor to provide and install disconnect(s) per NEC and manufacturer=s requirements at no additional cost.

C. Supports for equipment, except supports specifically indicated to be provided under other

Divisions, shall be provided under this Division. Supports shall be checked and coordinated under this Division to insure that they suit the equipment to be installed.

D. Damaged surfaces of factory finished items shall be repaired to the satisfaction of the

Architect as the work of this Division. Nameplates shall be protected until painting has been accomplished. Protection shall be removed and nameplates cleaned prior to acceptance of equipment.

E. Access Doors will be provided under this division for installation under other divisions.

1.8 MANUFACTURER'S RECOMMENDATIONS

A. Equipment and materials provided under this Division of the specifications shall be installed according to manufacturer's recommendations. Review all manufacturers' application and installation instructions prior to ordering equipment or commencing with the work. If the drawings or specifications show or describe any deviations from the manufacturer's recommendations, request clarification from the Architect and provide as directed at no additional cost to the Owner.

1.9 GUARANTEE AND SERVICE

A. Guarantee equipment, materials and workmanship for one year after beneficial use of a particular system, beneficial occupancy of the building or final acceptance of entire project.

Where specifically indicated extended warranties shall be provided. Beginning date of guarantee will be established only after written request is received by the Architect, and agreed upon by the Architect, stating the date the systems were turned over to the Owner for beneficial use or occupancy.

B. During the one year period of guarantee, any defects in equipment, materials, or workmanship shall be promptly corrected without cost to the Owner. Mechanical and associated electrical equipment shall be serviced and adjusted without cost during the guarantee period. Servicing and adjusting shall include all labor, material, parts, etc., required during the first year.

1.11 INTERRUPTION OF SERVICES

A. Services in existing buildings are to be kept in operation at all times, except when specific permission is given to do otherwise. Before any services are interrupted, arrangements shall be made with the occupants to do this work at a time most convenient to the occupants. This procedure may involve working at night, on Saturday or Sunday, or at a special time of the year, with the length of time of the interruption agreed upon in advance.

Once any service is interrupted, work to restore the service in the shortest possible time.

Work to restore the service shall be on a continuous basis unless temporary service is provided or approval is obtained from the occupants to do otherwise. Temporary services indicated or required shall be provided as work of this Division. Allowance shall be made in the bid for the cost of all overtime in this connection.

1.12 DEMOLITION

A. Demolition work shall conform to the applicable requirements of DIVISION 1 - GENERAL

REQUIREMENTS.

1.13 SPECIAL CONDITIONS

B. No piping, ducts or other mechanical equipment foreign to electrical equipment shall pass through or above spaces dedicated to panelboards., distribution panels, switchboards, and stairwells, elevator shafts, elevator equipment rooms and battery charging panels. Work shall conform with NFPA 70, Articles 384.

PART 2 - PRODUCTS

2.1 SUBSTITUTIONS

A. Names of manufacturers and catalog numbers indicated in the Contract Documents are to establish a standard as to design and quality. Other products similar in design and of equivalent quality may be used if submitted to the Architect and found acceptable by him.

Refer to General Conditions for additional information.

B. When the mechanical installer elects to use an acceptable alternate manufacturers' equipment, the mechanical installer shall be responsible to coordinate the change with all trades affected. The mechanical installer shall also pay for any additional work required under this Division as well as any other Division if the alternate equipment is used.

C. If required by Architect because of substitutions, submit for review 1/4" scale working drawings of equipment areas with plan and section views.

2.2 SUBMITTALS

A. Within 30 days after award of the Contract, and before executing any work, the Contractor shall submit for review six copies of descriptive equipment literature or shop drawings in one complete indexed and bound submittal for the following items:

Central Station Air Handling Units Duct & Fittings Duct and Pipe Insulation Air Distribution Devices Chilled Water Pipe Control Panels and Devices

B. Where applicable submissions shall include installation drawings and brochures showing locations, methods of anchoring, connections to work of others, wall conditions at each particular installation and special floor mounting conditions.

C. Submittals shall be identified with project name, equipment name and number as indicated on the drawings, and specification paragraph reference. Submittals shall be properly marked to show proposed model number and accessories being provided and shall have a stamp certifying the submittal has been reviewed and found to be in accordance with the specifications and drawings.

D. Submittals which do not comply with the above will be returned without review, for resubmittal.

2.3 ENCLOSURES

A. Control equipment enclosures such as, but not limited to, starters, data gathering panels, temperature control panels, etc., provided by the controls installer or provided as part of a packaged piece of equipment shall meet the following minimum standards unless specifically indicated otherwise.

B. Control equipment enclosures provided within a building or an accessible attic shall be equivalent to or greater than NEMA 1 type construction.

C. Control equipment enclosures provided outside of a building, a non-enclosed area or in an accessible crawl space under a building shall be equivalent to or greater than NEMA 3R type construction with drain and breather.

D. Control equipment enclosures provided within hazardous areas, controlling explosion-proof equipment shall be NEMA 7 or 9 type construction.

E. Where indicated on the drawings flush mounted enclosures shall be provided.

PART 3 - EXECUTION

3.1 RECORD DRAWINGS

A. Maintain during the course of the project and submit upon completion of the work, unless noted otherwise in the general conditions, two sets of project contract documents with colored pencils in a neat and understandable manner to show significant changes made during construction. Underground piping, valves and cleanouts outside of the building shall be dimensioned on the record drawings. Dimensions shall indicate the location of exterior mains with reference to the exterior building walls and/or corners.

3.2 OPERATING INSTRUCTIONS

A. Prior to the time scheduled for occupancy, provide the services of a competent mechanic to instruct the Owner in the care and operation of all equipment.

B. Before final acceptance, prepare and deliver to the Architect two bound copies of operating instructions, which shall include:

1. Description of major components of systems, including the function of major items.

2. Detailed operating instructions and instructions for making routine minor adjustments.

3. Routine maintenance operations.

4. Manufacturer's catalog data, service instructions wiring diagrams, fabrication drawings and parts list for each piece of operating equipment.

5. Copies of equipment submittals and shop drawings, including review sheet, reviewed by and acceptable to the Architect.

6. Guarantee and Warranty Information.

7. Names and telephone numbers of all subcontractors and suppliers.

C. Literature shall be contained in hard back binders and divided into a suitable number of volumes so as to permit convenient heavy usage.

3.3 ELECTRICAL WORK

A. Refer to schedules and electrical drawings for motor voltages.

B. Motors for mechanical equipment shall be provided under this Division. The work of this Division shall include setting and aligning integral drive motors in operating position.

C. Unless noted otherwise, motor starters for mechanical equipment shall be provided under this Division and installed and electrically connected under DIVISION 26 - ELECTRICAL.

D. Any other electrical work in connection with DIVISION 23 - MECHANICAL shall be done under this Division. Control disconnects, control wiring and raceways, and all electric interlock and signalling wiring and raceways shall be provided under this Division.

E. Firestats and line voltage speed and thermostatic control devices for single phase supply and/or exhaust fans shall be provided and set under this Division and electrically connected in the branch circuit wiring under DIVISION 26 - ELECTRICAL.

F. Any other safety, signalling, and control devices such as thermostats, firestats, damper motors, valve operators, push buttons, pilot lights, control and/or monitoring panels, crank- case heaters, etc., shall be provided and wired under this Division in strict accordance with an approved wiring diagram.

G. Wiring and raceways installed under this Division shall comply in all respects with the requirements of DIVISION 26 - ELECTRICAL.

3.4 EQUIPMENT SUPPORTS

A. Unless otherwise specified, supports necessary for properly supporting the work and the equipment of this Division shall be provided under this Division. Additionally, provide isolation materials to prevent transmission of vibration to the building structure. Isolation of equipment as shown on drawings or specified is the minimum required, and any additional isolation required to prevent transmission of vibrations shall be provided under this Division, in accordance with the equipment manufacturer's recommendations.

3.5 SAFETY PANS

A. Pipe safety pan outlet to floor drain.

3.6 OPENINGS, GROUNDS AND CHASES

A. Openings, grounds, lintels and chases will be provided under other Divisions, as directed by this Division, to accommodate the piping, ductwork and equipment. Sleeves and prepared openings shall be accurately located in slabs or walls before pouring of concrete.

B. It shall be the responsibility of this Division to ascertain that chases, openings and holes are properly located.

C. Where piping passes through smoke and/or fire separations, pack annular space between sleeve and piping with safing or fire barrier material. Pipe insulation shall be terminated and sealed on each side of sleeve.

3.7 UNIONS OR FLANGES

A. Unions or flanges shall be provided at items of equipment to facilitate their easy maintenance, including tube bundle or coil removal, and/or cleaning. It shall not be necessary to remove any valve, strainer, or device to do the required maintenance.

Piping connections at equipment shall be in accordance with the best engineering and installation practices. The requirements of this paragraph will be strictly enforced and if in the opinion of the Architect it is not adhered to the Contractor will be required to re-pipe the equipment as directed.

3.8 WORK RELATED TO EQUIPMENT NOT FURNISHED AS WORK OF THIS DIVISION

A. Unless specifically indicated otherwise, any required mechanical services for and required mechanical connections to items indicated on the drawings or in the specifications or items provided by the Owner shall be mechanically connected as work of this Division.

The Contractor shall provide piping, valves, traps, etc., as required for complete operation of each piece of equipment.

3.9 DISSIMILAR METALS

A. Dielectric couplings shall be provided between copper, bronze or brass piping material and steel piping material or steel tanks. Dielectric unions shall be provided at equipment where hereinbefore specified for equipment maintenance.

B. Dissimilar metals shall be isolated from surface contact with each other by the use of a non-conductive material, tape, etc.

3.10 PROTECTION OF WORK

A. Protect equipment, fixtures, and work from damage. Damaged work will be rejected and replaced at no additional cost to the owner. Where possible, rooms containing new plumbing fixtures shall be kept locked until the building is turned over to the Owner.

Immediately after installation of each plumbing fixture, it shall be covered with a fixture protector.

B. Mechanical equipment shall be protected from damage and from the weather. Provide adequate and proper storage facilities for items during the progress of the work. Special care shall be taken to provide protection for bearings, open connections, pipe coils, pumps, compressors and similar equipment.

3.11 CLEANING OF EQUIPMENT AND MATERIAL

A. Prior to acceptance, clean equipment and remove grease, dirt and foreign matter.

Pressure regulating assemblies, traps, flush valves and similar items shall be thoroughly cleaned. Remove and thoroughly clean and reinstall liquid strainer screens after the system has been in operation 10 days.

B. Air, oil and natural gas piping shall be blown out with clean compressed air.

C. When connections are made to existing systems, do cleaning and purging of the existing systems as required to restore them to the condition existing prior to the start of work.

3.12 FRICTION LOSSES, ELECTRICAL RATINGS AND SPACE REQUIREMENTS

A. The values of air and water friction losses, electrical current ratings and space requirements for various pieces of equipment, as contained in these specifications or as scheduled, are estimated values and sizes and have been used in obtaining specifications for equipment and for sizing ducts, pipe, electric wiring and motor controls.

Any necessary changes in any of these items resulting from values other than the estimated ones shown shall be the responsibility of the Mechanical Installer and shall be subject to the approval of the Architect. Pay any costs for additional labor and material required including costs of any other trade involved.

B. Should substitute equipment require different requirements from that shown on the drawings, the responsibility for the cost of the changes shall rest with this Division. Any such changes must be approved by the Architect.

3.13 MARKING OF EQUIPMENT

A. Each magnetic starter shall be suitably identified by means of 1/4" high letters cut in white laminated phenolic strip to show black letters. Additionally, each piece of mechanical equipment, where more than one of each is provided, such as but not limited to, boilers, air handling units, exhaust fans, etc., shall also be labeled. Strip shall be secured by means of two brass bolts and nuts or screws.

3.14 IDENTIFICATION OF PIPING

A. Piping, whether insulated or not shall be identified. Identification may be omitted from piping in inaccessible chases and furring and where use is obvious, due to its connection to fixtures or equipment and where the appearance would be objectionable, as in finished rooms.

B. Identification shall be placed as follows:

1. Near each valve and branch connection.

2. Above accessible ceilings wherever piping emerges or disappears from view when viewed from the floor of the room in which it is installed.

3. Labels shall not be more than 10' apart.

C. Identification of piping shall be by use of colored, waterproof, all temperature self-adhering vinyl pipe markers and directional arrows.

3.15 CHANGES TO PIPING OR DUCTS

A. Should the desire to make changes in the routing or arrangement of piping or ducts, whether for his own convenience, to avoid conflict with the work of other trades, or to conform to local codes, such changes shall not be made without the prior approval of the Architect.

3.16 STARTING AND TESTING

A. A competent and experienced service and installation mechanic shall be employed to start and adjust the equipment. The Architect reserves the right to require the test of any item of equipment or machinery. Such tests shall be conducted in the presence of the

3.17 PROJECT CLOSEOUT DOCUMENTS

A. Prior to the final acceptance of the project, deliver to the Architect, for review, the following:

1. Certificates of approval from local regulatory agencies.

2. Extended equipment warranties.

3. Signed receipts showing that keys to access doors, locked equipment, underground valve wrenches and vandal-proof screwdrivers have been delivered to the Owner.

4. Record drawings.

5. Operating instruction manuals which shall include copies of reviewed submittals and shop drawings including review sheet.

6. Results of potable water sterilization tests.

7. HVAC test and balance reports.

B. Final payment will be withheld until all applicable items have been provided to and are found satisfactory by the Architect.

END OF SECTION 22 00 01

SECTION 22 00 05 - BASIC MECHANICAL MATERIALS AND METHODS

A. Drawings and general provisions of Contract, including General and the Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following basic mechanical materials and methods to complement other Division 23 Sections.

1. Piping materials and installation instructions common to most piping systems.

2. Equipment nameplate data requirements.

3. Nonshrink grout for equipment installations.

4. Field-fabricated metal and wood equipment supports.

5. Installation requirements common to equipment specification Sections.

6. Mechanical demolition.

7. Cutting and patching.

8. Touch up painting and finishing.

9. Access doors.

10. Excavation and backfill

B. Pipe and pipe fitting materials are specified in piping system Sections.

1.3 DEFINITIONS

A. Pipe, pipe fittings, and piping include tube, tube fittings, and tubing.

B. Finished Spaces: Spaces other than mechanical and electrical equipment rooms, furred spaces, pipe and duct shafts, unheated spaces immediately below the roof, spaces above ceilings, unexcavated spaces, crawl spaces, and tunnels.

C. Exposed Interior Installations: Exposed to view indoors. Examples include finished occupied spaces and mechanical equipment rooms.

D. Exposed Exterior Installations: Exposed to view outdoors, or subject to outdoor ambient temperatures and weather conditions. Examples include rooftop locations.

E. Concealed Interior Installations: Concealed from view and protected from physical contact by building occupants. Examples include above ceilings and in duct shafts.

F. Concealed Exterior Installations: Concealed from view and protected from weather conditions and physical contact by building occupants, but subject to outdoor ambient temperatures. Examples include installations within unheated shelters.

1.4 QUALITY ASSURANCE

A. Qualify welding processes and operators for structural steel according to AWS D1.1 "Structural Welding Code--Steel."

B. Qualify welding processes and operators for piping according to ASME "Boiler and Pressure Vessel Code," Section IX, "Welding and Brazing Qualifications."

C. Comply with provisions of ASME B31 Series "Code for Pressure Piping." Certify that each welder has passed AWS qualification tests for the welding processes involved and that certification is current.

D. ASME A13.1 for lettering size, length of color field, colors, and viewing angles of identification devices.

E. Equipment Selection: Equipment of greater or larger power, dimensions, capacities, and ratings may be furnished provided such proposed equipment is approved in writing and connecting mechanical and electrical services, circuit breakers, conduit, motors, bases, and equipment spaces are increased. No additional costs will be approved for these increases, if larger equipment is approved. If minimum energy ratings or efficiencies of the equipment are specified, the equipment must meet the design requirements and commissioning requirements.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver pipes and tubes with factory-applied end-caps. Maintain end-caps through shipping, storage, and handling to prevent pipe-end damage and prevent entrance of dirt, debris, and moisture.

B. Protect stored pipes and tubes from moisture and dirt. Elevate above grade. When stored inside, do not exceed structural capacity of the floor.

C. Protect flanges, fittings, and piping specialties from moisture and dirt.

D. Protect stored plastic pipes from direct sunlight. Support to prevent sagging and bending.

1.6 SEQUENCING AND SCHEDULING

A. Coordinate mechanical equipment installation with other building components.

B. Arrange for chases, slots, and openings in building structure during progress of construction to allow for mechanical installations.

C. Coordinate the installation of required supporting devices and set sleeves in poured-in-place concrete and other structural components as they are constructed.

D. Sequence, coordinate, and integrate installations of mechanical materials and equipment for efficient flow of the Work. Coordinate installation of large equipment requiring positioning prior to closing in the building.

E. Coordinate connection of electrical services.

2.1 MATERIALS AND WORKMANSHIP

A. Equipment and materials shall be new and shall be listed by Underwriter’s Laboratories, Inc. in categories for which standards have been set by that agency. Methods of installation shall be in full accord with the latest and best engineering practices. Pressure vessels, as called for by respective codes, shall be stamped ASME and National Board Commission.

2.2 PIPE AND PIPE FITTINGS

A. Refer to individual piping system specification Sections for pipe and fitting materials and joining methods.

B. Pipe Threads: ASME B1.20.1 for factory-threaded pipe and pipe fittings.

2.3 JOINING MATERIALS

A. Refer to individual piping system specification Sections in Division 23 for special joining materials not listed below.

B. Pipe Flange Gasket Materials: Suitable for the chemical and thermal conditions of the piping system contents.

C. ASME B16.21, nonmetallic, flat, asbestos-free, 1/8-inch (3-mm) maximum thickness, except where thickness or specific material is indicated.

a. Full-Face Type: For flat-face, Class 125 cast-iron and cast-bronze flanges.

b. Narrow-Face Type: For raised-face, Class 250 cast-iron and steel flanges.

D. ASME B16.20 for grooved, ring-joint, steel flanges.

E. AWWA C110, rubber, flat face, 1/8 inch (3 mm) thick, except where other thickness is indicated; and full-face or ring type, except where type is indicated.

F. Flange Bolts and Nuts: ASME B18.2.1, carbon steel, except where other material is indicated.

G. Plastic Pipe Flange Gasket, Bolts, and Nuts: Type and material recommended by piping system manufacturer, except where other type or material is indicated.

H. Solder Filler Metal: ASTM B 32.

1. Alloy Sn95 or Alloy Sn94: Tin (approximately 95 percent) and silver (approximately 5 percent), having 0.10 percent lead content.

2. Alloy Sn50: Tin (50 percent) and lead (50 percent).

3. Alloy E: Tin (approximately 95 percent) and copper (approximately 5 percent), having 0.10 percent maximum lead content.

4. Alloy HA: Tin-antimony-silver-copper-zinc, having 0.10 percent maximum lead content.

5. Alloy HB: Tin-antimony-silver-copper-nickel, having 0.10 percent maximum lead content.

6. Alloy Sb5: Tin (95 percent) and antimony (5 percent), having 0.20 percent maximum lead content.

I. Brazing Filler Metals: AWS A5.8.

J. BCuP Series: Copper-phosphorus alloys.

1. BAg1: Silver alloy.

K. Welding Filler Metals: Comply with AWS D10.12 for welding materials appropriate for wall thickness and chemical analysis of steel pipe being welded.

L Solvent Cements: Manufacturer's standard solvents complying with the following:

M. Acrylonitrile-Butadiene-Styrene (ABS): ASTM D 2235.

1. Chlorinated Poly(Vinyl Chloride) (CPVC): ASTM F 493.

2. Poly(Vinyl Chloride) (PVC): ASTM D 2564.

N. PVC to ABS Transition: Made to requirements of ASTM D 3138, color other than orange.

O. Plastic Pipe Seals: ASTM F 477, elastomeric gasket.

P. Flanged, Ductile-Iron Pipe Gasket, Bolts, and Nuts: AWWA C110, rubber gasket, carbon steel bolts and nuts.

Q. Couplings: Iron body sleeve assembly, fabricated to match outside diameters of plain-end pressure pipes.

1. Sleeve: ASTM A 126, Class B, gray iron.

2. Followers: ASTM A 47 (ASTM A 47M), Grade 32510 or ASTM A 536 ductile iron.

3. Gaskets: Rubber.

4. Bolts and Nuts: AWWA C111.

5. Finish: Enamel paint.

2.4 PIPING SPECIALTIES

A. Escutcheons: Manufactured wall, ceiling, and floor plates; deep-pattern type where required to conceal protruding fittings and sleeves.

B. Inside Diameter: Closely fit around pipe, tube, and insulation.

1. Outside Diameter: Completely cover opening.

2. Cast Brass: Split casting, with concealed hinge and set-screw.

3. Finish: Rough brass.

a) Finish: Polished chrome plate.

C. Stamped Steel: Split plate, with concealed hinge, set-screw, and chrome-plated finish.

D. Cast-Iron Floor Plate: One-piece casting.

E. Dielectric Fittings: Assembly or fitting having insulating material isolating joined dissimilar metals to prevent galvanic action and stop corrosion.

F. Description: Combination of copper alloy and ferrous; threaded, solder, plain, and weld neck end types and matching piping system materials.

G. Insulating Material: Suitable for system fluid, pressure, and temperature.

H. Dielectric Unions: Factory-fabricated, union assembly for 250-psig minimum working pressure at a 180 deg F temperature.

I. Dielectric Flanges: Factory-fabricated, companion-flange assembly for 150- or 300-psig minimum pressure to suit system pressures.

J. Dielectric-Flange Insulation Kits: Field-assembled, companion-flange assembly, full-face or ring type. Components include neoprene or phenolic gasket, phenolic or polyethylene bolt sleeves, phenolic washers, and steel backing washers.

1. Provide separate companion flanges and steel bolts and nuts for 150- or 300-psig minimum working pressure to suit system pressures.

K. Dielectric Couplings: Galvanized-steel coupling, having inert and noncorrosive, thermoplastic lining, with threaded ends and 300-psig minimum working pressure at 225 deg F temperature.

L. Dielectric Nipples: Electroplated steel nipple, having inert and noncorrosive thermoplastic lining, with combination of plain, threaded, or grooved end types and 300-psig working pressure at 225 deg F temperature.

M. Mechanical Sleeve Seals: Modular, watertight mechanical type. Components include interlocking synthetic rubber links shaped to continuously fill annular space between pipe and sleeve. Connecting bolts and pressure plates cause rubber sealing elements to expand when tightened.

N. Sleeves: The following materials are for wall, floor, slab, and roof penetrations:

1. Steel Sheet-Metal: 24-gage or heavier galvanized sheet metal, round tube closed with welded longitudinal joint.

2 Steel Pipe: ASTM A 53, Type E, Grade A, Schedule 40, galvanized, plain ends.

3. Cast-Iron: Cast or fabricated wall pipe equivalent to ductile-iron pressure pipe, having plain ends and integral water stop, except where other features are specified.

4. Wall Penetration Systems: Wall sleeve assembly, consisting of housing, gaskets, and pipe sleeve, with 1 mechanical-joint end conforming to AWWA C110 and 1 plain pipe-sleeve end.

5. Penetrating Pipe Deflection: 5 percent without leakage.

6. Housing: Ductile-iron casting having waterstop and anchor ring, with ductile-iron gland, steel studs and nuts, and rubber gasket conforming to AWWA C111, of housing and gasket size as required to fit penetrating pipe.

7. Pipe Sleeve: AWWA C151, ductile-iron pipe.

8. Housing-to-Sleeve Gasket: Rubber or neoprene push-on type of manufacturer's design.

O. Cast-Iron Sleeve Fittings: Commercially made sleeve having an integral clamping flange, with clamping ring, bolts, and nuts for membrane flashing.

1 Underdeck Clamp: Clamping ring with set-screws.

P. PVC Plastic: Manufactured, permanent, with nailing flange for attaching to wooden forms.

Q. PVC Plastic Pipe: ASTM D 1785, Schedule 40.

R. PE Plastic: Manufactured, reusable, tapered, cup-shaped, smooth outer surface, with nailing flange for attaching to wooden forms.

2.5 GROUT

A. Nonshrink, Nonmetallic Grout: ASTM C 1107, Grade B.

B. Characteristics: Post-hardening, volume-adjusting, dry, hydraulic-cement grout, nonstaining, noncorrosive, nongaseous, and recommended for interior and exterior applications.

C. Design Mix: 5000-psi (34.50-MPa), 28-day compressive strength.

1. Packaging: Premixed and factory-packaged.

2.6 ACCESS DOORS

A. Doors in gypsum board or masonry construction shall be Karp type DSC-214M or Milcor style M-Standard, 16-gauge steel frame and 14-gauge steel door construction, continuous piano hinge and zinc chromate prime coat.

B. Doors in glazed or ceramic tile construction shall be same type as above except all stainless steel construction.

C. Doors in inaccessible acoustical tile ceilings, or walls with wall covering shall be Karp type

KSC-210, or Milcor style AT 16-gauge steel frame and 18-gauge steel panel construction, recessed door for acoustical tile or gypsum board covered with matching wall covering, concealed hinge with a zinc chromate prime coat, and exposed edges painted white when installed in acoustical tile ceiling.

D. Doors in fire rated partitions or ceilings (up to 1 2 hour rating) shall carry UL AB @ Label;

KARP style KRP-150 FR or Milcor Style.

E. Door required in types of construction not herein before specified shall suit the type and style of material in which installed.

F. Unless otherwise indicated doors shall have screw driver operated locks.

2.7 MAGNETIC STARTERS

A. Provide magnetic starters for all three phase motors. Also provide magnetic starters for single phase motors which start and stop as part of an automatic control sequence.

Unless noted otherwise magnetic starters shall be across-the-line type rated per NEMA standards. Starters shall have undervoltage protection when used with momentary-contact push button stations and shall have undervoltage release when used with maintained contact push button stations. Enclosures for starters shall be as herein before specified. Starters in motor control centers shall be fully compatible with the motor control center. Provide two-speed starters for two-speed motors.

B. Starters shall be complete with integrally fused 120 volt control transformer, start-stop push button and pilot light or hand-off-auto switch and pilot light, where indicated, or as required for control. Starters for motors interlocked to run with other motors or which have automatic startstop controls (exclusive of safety controls such as firestats, freezestats, etc.) shall have hand-off-auto switch. Starter shall be wired so as not to by-pass safety controls when in the "hand" position.

C. Starter contacts shall be of silver alloy, and shall be of the double break type. The movable magnet and contact assembly, an arc hood in which the fixed contacts are mounted, solenoid cell, and thermal overload relays (one in each phase) shall be assembled and mounted on a heavy steel back plate. The only moving part shall be the magnet and contact assembly which shall move up and down. Each pole shall be enclosed in an individual arc chamber.

D. Starters for 5 horsepower and larger 3-phase motors shall include under voltage/phase-reversal/phase-loss protection relay wired into the control circuit.

E. Overload protective devices shall be selected in accordance with the motor nameplate, and shall be of the thermal inverse time limit type and shall include a manual reset type push button on the outside of the cover. Overloads shall operate on the melting alloy principle.

F. Starters shall have normally open and/or closed external electrical interlocks as required to suit equipment controlled.

2.8 MOTORS

A. Unless otherwise indicated, motors shall be constant speed, normal starting torque for pumps, high starting torque for fans (with low starting current) as required for the application. Electrical characteristics shall conform with the electrical supply as indicated on the electrical drawings.

B. Three-phase motors shall be squirrel cage induction type.

C. Single-phase motors shall be split phase or capacitor start type with built-in thermal overload unless indicated otherwise.

D. Motors shall be guaranteed to operate continuously at full load with 10% voltage variation above or below the specified voltage. Motors shall be rated for an ambient temperature of 40 degrees C and a temperature rise not to exceed 40 degrees C.

E. Motors shall be copper wound high efficiency type and have either sleeve or prelubricated ball bearings as required for the particular application. Open drip-proof motors shall have Class B insulation. TEFC motors shall have Class F insulation.

F. Unless noted otherwise on the drawings or in the specifications, housings for motors in indoor locations shall be open drip proof (ODP) or explosion proof type. Motors in outdoor locations or subject to excessive moisture shall be totally enclosed or totally enclosed fan cooled (TEFC) type. Belt drive motors shall have bases with provisions for adjustment in field.

G. Motors provided on equipment not as an integral part of the equipment but propelling the equipment by the use of belts, sheaves, couplings, etc., shall be as manufactured by U.S.

Electric, Marathon, Emerson, General Electric or approved equal. Manufacturers requesting approval shall submit evidence of a factory authorized service facility within a reasonable distance of the project to service or replace motors under warranty. Motors manufactured by or specifically for equipment manufacturers and provided as an integral part of the equipment package need not comply with the requirements of this paragraph.

2.9 PREPARED OPENINGS

A. Piping installed through masonry walls or concrete floors above grade shall pass through pipe sleeves.

B. Ducts installed through masonry walls or concrete floors above grade shall pass through

20-gauge galvanized sheet metal sleeves. Duct sleeve shall have a 1/2" maximum annular clearance around duct. Allowance shall be made for external duct wrap.

C. Exposed piping passing through masonry walls shall be fitted with chromium plated escutcheons on each side of the wall. Exposed ductwork passing the masonry walls shall be fitted with a 2" wide sheet metal flange around all four sides of duct on each side of the wall.

2.10 FIRE BARRIER MATERIAL

A. Fire barrier material shall be provided in annular spaces between sleeves and piping or tubing where piping or tubing penetrates floors or partitions that have a fire rating of one hour or greater.

B. Material shall be UL classified as a through penetration fill, void or cavity material and shall be capable of passing a 4 hour fire test per ASTM E-814.

C. Material shall be installed in strict accordance with the manufacturers instructions.

2.11 SAFING MATERIAL

A. Safing material shall be installed in annular spaces between sleeve and pipe or tubing where sleeve and pipe or tubing penetrate partitions that are designated as smoke separations.

B. Material shall be mineral wool designed for hand packing. Material shall have an ASTM

E84 rating of flame spread B10, fuel contributed B0, smoke developed B0 and shall be rated non-combustible per ASTM E136.

3.1 EXCAVATING AND BACKFILLING UNDER BUILDING SLABS

A. Before excavating or trenching, the Contractor shall locate and stake out existing underground utilities which are to remain and may be adversely affected by the work.

Work shall be performed in a manner to avoid damaging the existing utilities. The Contractor shall repair or replace any utilities damaged by him.

B. The Contractor shall do all excavating, trenching and backfilling for the work of this

Division. The Contractor shall work around or remove as necessary all obstructions.

Bottoms of trenches shall be tamped hard. Bell holes shall be excavated to insure that pipe rests on solid earth for its entire length.

C. Backfilling trenches for piping under structural pile supported slabs shall be done by hand, Fill shall be "walked" or hand tamped on each side of pipe to provide compaction that will hold the piping in alignment. The remainder of the trench may be backfilled by hand or approved mechanical means. Care shall be taken during tamping to keep piping in alignment.

D. The Contractor shall remove any water which may be found or may accumulate in the trenches and shall perform all work necessary to keep them clear of water while the work is in progress, or as may be required for inspections.

3.2 EXCAVATING AND BACKFILLING OUTSIDE BUILDING SLAB

A. Clearing and Grubbing:

1. The Contractor shall clear and grub the surface areas and remove all surface materials of whatever nature encountered, except where jacking and boring is required, over the line of and to either side of the trenches, the site of other structures and all other areas where the piping systems are to be installed.

2. All plants, and surfacing that occur in the area of the excavation shall be carefully removed and maintained in an area where they will not be damaged. After the excavations are filled, the plants, and surfacing shall be replaced as directed. All existing sidewalks, driveways, or other cement or asphalt surfaces which are to remain and have been damaged during excavating shall be repaired to match the adjacent work in material and finish.

B. TRENCHES

1. Trenches shall be dug so that pipe can be laid to the alignment, depth and slope indicated. Excavation shall be only so far in advance of the pipe laying as to reveal any obstructions, but never more than 100' in advance of the pipe installation unless specifically approved by the Architect.

2. Trenches shall be graded such that each section of pipe will rest upon the trench bottom for the full length of its barrel. Provide bell holes at each joint as required for this purpose.

3. Trenching shall be such that the pipe will have no less than 30" of minimum cover unless specifically graded with less cover on the drawings. Depth of cover shall be measured from finished grade to the top of the barrel of the pipe.

4. Where sub-surface obstructions are encountered, the Contractor will be permitted to lay pipe above the obstruction, if the minimum cover required can be obtained while providing a cushion, between the bottom of the pipe and the top of the obstruction, at least 6" thick. Where this minimum cover cannot be obtained, the Contractor will be required to lay pipe under the obstruction provided that the change in elevations will not adversely affect the minimum slope (if any). The Contractor will receive no additional compensation for constructing the line in this manner.

5. Where necessary to protect workmen, the work, or adjacent property, the Contractor shall provide necessary sheeting and/or shoring.

6. Underground cables, power poles, etc., along the line of work shall be protected and sufficient barricades, lanterns, etc., shall be provided for the protection of the public.

7. When excavation is carried below or beyond the specified grade, the space shall be filled with river sand, and properly compacted up to specified grade. No claim for additional compensation shall be made for backfilling excess excavations.

8. If, in the opinion of the Architect, the soil at the bottom of the trench is such that it cannot be properly graded, or that it will not properly support the pipe, the Contractor shall excavate below the specified grade as directed by the Architect.

Wherever excavation is carried below the specified grade, at the direction of the Architect, the space shall be filled with river sand, and properly compacted up to specified grade. Cost of such excavation and backfill shall be agreed upon in advance as a Change Order to the Contract.

9. Trenches shall be of such extra width, when required, to permit the convenient placing of supports, sheeting, shoring and bracing and the installation of valves, fittings, and thrust blocking.

C. DEWATERING

1. The Contractor shall remove any water which may be found or may accumulate in the trenches and excavations and shall perform the work necessary to keep them clear of water while the work is in progress, or as may be required for inspections.

2. The Contractor must use due vigilance and care so that no water originating on his work, or due to his work, which he is obligated to handle and dispose of under his contract, shall discharge or be discharged upon the work or into the trenches of another contract, unless by mutual agreement of parties affected. Should any dispute arise from this cause, the matter shall be referred to the Architect for final settlement. Nothing in this Section is to be construed as preventing the reasonable use by any Contractor of any ditch, canal or swale which is designed and used for drainage.

3. Ditches or swales parallel with the trench must be maintained unobstructed.

When necessary, a proper platform shall be built over them and the excavated dirt placed thereon so as to permit the free passage of all drainage water.

D. BEDDING AND BACKFILL

1. Bedding and backfill material shall be river sand.

2. Backfilling shall not begin until the pipe work to be covered has been inspected by the Architect. The Architect reserves the right to order any trench backfilled at any time after installation of pipe, if, in his opinion, the particular trench remaining open constitutes a public nuisance.

3. The Contractor shall be responsible for settlement of backfill in trenches excavated for work of this Division. Trenches shall be refilled as often as necessary to bring them back to required or original grades.

4. Bedding under pipe - Trenches shall be bedded by hand. A 6" layer of river sand shall be placed in the trench and compacted and graded prior to installing the pipe. After the pipe is installed river sand shall be carefully placed in 3" layers on both sides of the pipe and compacted and graded by hand. The sand shall be deposited in the trench for its full width on each side of the pipe, fittings and appurtenances, simultaneously.

a. Backfilling to 1' above pipe - From the centerline of the pipe, fittings and appurtenances to a depth of 1' above the top of the barrel of the pipe, the trench shall be backfilled by hand or approved mechanical means with river sand. The Contractor shall use special care in placing this portion of the backfill so as to avoid injuring or moving the pipe. This part of the backfill shall be compacted by method approved by the Architect.

b. Backfilling to grade - From 1' above the barrel of the pipe up to grade, the Contractor shall fill the trench with river sand. Backfill shall be compacted by methods specified in DIVISION 2 - SITEWORK. Where sheeting and bracing are removed from the trench or excavation as backfilling progresses, care shall be taken to insure that voids left by the withdrawn timbers are carefully and thoroughly compacted.

3.3 DISPOSAL OF EXCESS EXCAVATED MATERIAL

A. Excess fill taken from excavations may be used as fill for the site in general, but may not be used as fill under slabs, sidewalks, pavements, drives, etc., provided same will readily compact, is free of debris, organic or other injurious matter, and is acceptable to the

B. Any surplus earth which may be left at the site after all site grading and excavations have been completely filled shall, unless otherwise provided, be regarded as the property of the Contractor, and shall be removed as soon as possible at his expense.

3.4 SUB-SURFACE OBSTRUCTIONS

A. Care must be taken not to disturb, injure or remove any pipes, cables, conduits or other underground structures or utilities. If necessary, the Contractor shall, at his own expense, shore-up and protect underground piping, conduit structures or utilities which may be endangered during the work and shall maintain such structures and utilities in operation.

B. In the event subsurface structures, pipes, cables, conduits or utilities are broken or damaged in the execution of the work, the Contractor shall notify the proper authorities and shall make repairs, at his own expense, and to the satisfaction of the Architect and authorities involved. The Contractor shall be responsible for any damage to persons or property caused by such breaks.

C. The Contractor shall uncover, sub-surface obstructions in advance of construction so that the method of avoiding same may be determined before pipe laying reaches the obstructions.

D. The Architect will, in all cases, be the judge of the necessity of expedience of any change or rearrangement of any underground structures which may interfere with the construction of the work under this Section.

3.5 SHEETING AND SHORING

A. Sheeting and shoring shall be placed in excavations and trenches as required to suit the ground conditions and to properly and safely support the excavations and trench walls and any adjacent structures.

B. Placement of the sheeting and shoring in the trench shall not restrict the excavation and trench width specified in other Sections.

C. Sheeting and shoring for excavations and trenches less than five feet in depth may be of wood. Wood indicated to remain in excavations and trenches shall be treated type.

Sheeting and shoring for excavations and trenches greater than five feet in depth shall be of steel construction.

D. Unless otherwise instructed by the Architect, all wood sheeting, shoring and bracing shall be cut-off at an elevation of 24" below finished grade. The lower portion of the sheeting and bracing below grade shall remain in the ground. If instructed by the Architect to remove the wood or steel sheeting and shoring it shall not be removed until backfilling is completed.

3.6 SURFACE OBSTRUCTIONS

A. The Contractor shall be responsible for the integrity of all poles, culverts, posts, fences, trees, walls, buildings or any other structures, property or objects along the line of his work and shall shore up, support and protect them when necessary. Any damage caused by or through his work shall, within a reasonable time, be repaired and/or replaced and restored to the same condition as existed before his work, without any additional compensation.

3.7 CROSSING OF DITCHES

A. Natural drainage ditches or swales shall not be unreasonably blocked or obstructed or prevented from carrying their customary drainage and shall be replaced by the Contractor in as good condition as they were originally, without additional compensation.

B. The Contractor shall be responsible for any damage of any kind resulting from interference with or obstruction of any drainage ditches or other waterway.

3.8 THRUST BLOCKS

A. Thrust blocks shall be provided for underground water mains 4" and larger and sewer force mains at each change of direction 113 degrees or greater, at tees, tapping sleeves, hydrants, and at dead ends. Thrust blocks shall be constructed of concrete or timbers.

Thrust blocks shall be of sufficient size to resist the force resulting from the flow of water through the type of fitting being blocked.

B. Timber thrust blocks shall be constructed by setting treated 2 x 12 planks against the undisturbed…