Mechanical.pdf

United States Air Force Academy Repair HTHW Phase 1/4

MECHANICAL GENERAL PROVISIONS 23 00 00 - 1

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SECTION 23 00 00 - MECHANICAL GENERAL PROVISIONS

PART 1 - GENERAL

1.1 WORK INCLUDED

A. This Section applies to all Division 23 (mechanical) work.

B. Related Documents: The general provisions of the Contract, including General and Supplementary Conditions and General Requirements applies to all Division 23 work.

1.2 COORDINATION BETWEEN SPECIFICATION SECTIONS

A. Each specification section within their respective division shall be coordinated with all other sections in that division for related work.

1.3 COORDINATION OF WORK

A. General:

1. Refer to the Division 1 sections for general coordination requirements applicable to the entire work. The contractor shall recognize that the contract documents are diagrammatic in showing certain physical relationships which must be established within the plumbing, mechanical and electrical work, and in its interface with other work including utilities and that such establishment is the exclusive responsibility of the Contractor. Because the drawings are diagrammatic and on a small scale, all rises, drops, offsets, etc., have not been shown. The Contractor shall agree to provide and install the necessary conduit, piping, fittings, valves, ducts, and other specialties to suit such conditions without additional cost to the Owner.

2. Piping and conduits, except electrical conduits run in floor construction, suspended ceiling space, or roof space shall be run parallel with lines of the building unless otherwise noted on drawings. Water supply pipes, where practicable, shall be placed at same elevation and hung on multiple hangers. Electric conduits shall not be hung on hangers with any other service, unless approved by the Engineer and shall be hung above all other service pipes. The different service pipes, valves, fittings, and similar items, shall be so installed that after the covering is applied there will be not less than 1/2" clear space between the finished covering and other work and between the finished covering of parallel adjacent pipes. Hangers on different service lines running close to and parallel with each other shall be in line with each other and parallel to the lines of the building. Exact location of electric outlets, piping, ducts, and the like shall be coordinated to avoid interferences between lighting fixtures, piping, ducts, and similar items.

3. Locate operating and control equipment properly to provide easy access, and arrange entire mechanical and electrical work with adequate access for operation and maintenance.

4. Give right-of-way to piping which must slope for drainage.

5. Advise other trades of openings required in their work for the subsequent move-in of large units of plumbing, mechanical and electrical work (equipment).

6. Verify final locations for rough-ins with field measurements and with the requirements of the actual equipment to be connected.

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B. Coordination Drawings:

1. For locations where several elements of mechanical (or combined plumbing, mechanical and electrical) work must be sequenced and positioned with precision in order to fit into the available space, prepare coordination drawings (shop drawings) showing the actual physical dimensions (at accurate scale) required for the installation. Prepare and submit coordination drawings prior to purchase-fabrication-installation of any of the elements involved in the coordination.

2. Install equipment and materials to provide required access for servicing and maintenance.

C. Contract Document Discrepancies:

1. If work is required in manner to make it impossible to produce first class work, or should discrepancies appear among contract documents, request interpretation before proceeding with work. If Contractor fails to make such request, no excuse will thereafter be entertained for failure to carry out work in satisfactory manner. Should conflict occur in or between drawings, and specifications, Contractor is deemed to have estimated on more expensive way of doing work unless he shall have asked for and obtained written decision before submission of proposal as to method or materials required.

1.4 FEES, PERMITS, LICENSES, UTILITY CONNECTION CHARGES, AND UTILITY COST.

A. The Contractor shall obtain and pay for all fees, permits, licenses, utility connection charges (water, sanitary sewer, storm sewer and gas) and utility cost for services to the building required.

B. The Contractor shall maintain all necessary signal lights, guard against danger and use all proper means for the safety of the public.

C. The Contractor shall pay for opening and repairing all pavement cuts.

D. The Contractor shall furnish to the Architect copies of all fees, permits and licenses required for all mechanical work herein specified before any mechanical work is started.

1.5 CONTRACTORS RESPONSIBILITY FOR CONSULTANTS ADDITIONAL SERVICES

A. The Consultant is entitled to compensation for additional services not included in their contract but provided on this project. Since our contract is with the Owner or Architect, the Owner or Architect has the responsibility to compensate us for these additional services. The Consultant will provide, without advance authorization from the Client, the Additional Services listed below.

These services will be tracked in our office and billed to the Client upon completion of the project. The client will in turn deduct the sum of these additional services from the contractors final payment. The following is a list of services that have been included in our contract with the client along with a description of services that will be charged against the contractors final payment due to services brought about due to the contractors actions:

1. Re-submittals: The consultant has included in their contract with our Client, one (1) review for each submittal item. The contractor is required to carefully review each submittal from their suppliers and subcontractors for compliance with the contract documents along with a written notice of deviations of any type prior to submitting them to the Engineer for review. The Contractor shall be responsible to the Client for all

MECHANICAL GENERAL PROVISIONS 23 00 00 - 3

(12145-3) reasonable costs charged by the Consultant to the Client for the Additional Services required for re-submittals.

2. Substitutions: The Consultant has included in their contract with our Client, incorporation of minor changes to the contract documents to develop record documents in electronic format. These changes are limited to unforeseen site conditions and clarifications to the contract documents. Review of substitutions for compliance with the contract documents, and services required to modify and coordinate changes required due to contractor substitutions or deviations from the contract documents are not included in our contract with the Client. The Contractor shall be responsible to the Client for all reasonable costs charged by the Consultant to the Client for the Additional Services required to modify and coordinate documents or provide field coordination due to contractor substitutions or deviations from the contract documents.

3. Requests For clarification or Interpretation (RFI): The Contractor may, after exercising due diligence to locate required information, request from the Consultant clarification or interpretation of the requirements of the Contract Documents. The Consultant shall, with reasonable promptness, respond to such Contractor’s request for clarification or interpretation. However, if the information requested by the Contractor is apparent from field observations, is contained in the Contract Documents or is reasonably inferable from them, the Contractor shall be responsible to the Client for all reasonable costs charged by the Consultant to the Client for the Additional Services required to provide such information.

4. Construction Meetings & Site Observations: The consultant has included a predetermined number of construction meetings and site observations in their contract with the owner based on the anticipated construction period specified. However if additional construction meetings and site observations are required due to the contractors delay in completion of the project, the Contractor shall be responsible to the Client for all reasonable costs charged by the Consultant to the Client for the Additional Services required to attend additional construction meetings or provide additional site observations.

5. Re-inspections: The contractor is responsible to prepare a final punch list for the project and to correct all items prior to calling for a final inspection from the consultant. Upon being notified, the consultant will then visit the site and prepare a final punch list. The contractor is then required to correct all items on the consultants final punch list and call for a re-inspection of the project. If all items have not been corrected, the final punch list will be updated and additional re-inspections will be required. However if additional re-inspections are required, the Contractor shall be responsible to the Client for all reasonable costs charged by the Consultant to the Client for the Additional Services required for the additional re-inspections.

1.6 SINGULAR NUMBER

A. Where any device or part of equipment is herein referred to in the singular number (such as "the pump"), such reference shall be deemed to apply to as many such devices as are required to complete the installation as shown on the drawings.

1.7 CLEANING AND PROTECTION

A. General: During handling and installation of work at project site, each contractor shall clean and protect work in progress and adjoining work on a basis of perpetual maintenance. Apply suitable protective covering on newly installed work where reasonably required to ensure freedom from damage or deterioration at time of substantial completion; otherwise, clean and perform maintenance on newly installed work as frequently as necessary through remainder of construction period. Adjust and lubricate operable components to ensure operability without damaging effects.

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1.8 MAINTENANCE AND OPERATION MANUALS

A. Prepare and submit four (4) copies of maintenance and operation instructions for all Division 23 and Division 26 equipment furnished. Organize maintenance and operating manual information into suitable sets of manageable size, and bind into individual binders properly identified and indexed (thumb-tabbed). Include emergency instructions, spare parts listing, copies of warranties, wiring diagrams, recommended "turn-around" cycles, inspection procedures, shop drawings, product data, and similar application information. Bind each manual of each set in a heavy-duty 2", 3-ring vinyl-covered binder, and include pocket folders for folded sheet information. Mark identification on both front and spine of each binder.

1.9 PROJECT CLOSE OUT

A. General: Refer to the Division 1 sections for general closeout requirements. Maintain a daily log of operational data on mechanical equipment and systems through the closeout period;

record hours of operation, assigned personnel, fuel consumption and similar information; submit copy to Owner.

B. Record Drawings: For Division 23, Division 26, and Division 33 work, give special attention to the complete and accurate recording of underground conduit, piping and ductwork, other concealed and non-accessible work, branching arrangement and valve location for piping systems, locations of dampers and coils in duct systems, locations of control system sensors and other control devices, and work of change orders where not shown accurately by contract documents.

C. Closeout Equipment/Systems Operations: Sequence operations properly so that work of project will not be damaged or endangered. Coordinate with seasonal requirements. Operate each item of equipment and each system in a test run of appropriate duration with the Owner's operating personnel present, to demonstrate sustained, satisfactory performance. Adjust and correct operations as required for proper performance. Clean and lubricate each system, and replace dirty filters, excessively worn parts and similar expendable items of the work.

D. Operating Instructions: Conduct a full-day walk-through instruction seminar for the Owner's personnel to be involved in the continued operation and maintenance of mechanical equipment and systems. Explain the identification system, operational diagrams, emergency and alarm provisions, sequencing requirements, seasonal provisions, security, safety, efficiency and similar features of the systems.

E. Turn-Over of Operation: At the time of substantial completion, turn over the prime responsibility for operation of the mechanical equipment and systems to the Owner's operating personnel.

1.10 FINAL PAYMENT

A. Final Payment will not be made until the Contractor has satisfactorily completed all final inspection items.

1.11 GUARANTEE

A. The one-year guarantee period shall not start until the project is fully completed and the Contractor has received the Final Payment and Certification of Completion.

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B. All equipment and all work shall be fully guaranteed, parts, and labor, for one full year from the date of the Certificate of Completion. Repairs made during this period must be fully guaranteed for an additional one year period from the date of repairs.

C. The Division 23 Contractor has the full responsibility to guarantee all equipment and work and shall assume full responsibility to repair any equipment at his cost that the manufacturer refuses to guarantee.

D. The Owner has the right to order repairs to any equipment or work provided hereon and to charge the Contractor for same if repairs are not made by the Contractor within a reasonable period of time not to exceed 24 hours during an emergency or 72 hours on a non-critical item.

E. Where equipment is furnished by the owner and installed by the contractor, the contractors responsibilities shall remain as indicated above except that the owner will assist in enforcing the stipulated manufacturer’s warranty.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION (Not Applicable)

END OF SECTION 23 00 00

BASIC MECHANICAL MATERIALS AND METHODS 23 05 00 - 1

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SECTION 23 05 00 - BASIC MECHANICAL MATERIALS AND METHODS

PART 1 - GENERAL

1.1 WORK INCLUDED

A. Extent of basic mechanical materials and methods work required by this section is indicated on drawings and schedules, and/or specified in other Division-23 sections.

B. Types of basic mechanical materials and methods specified in this section include the following:

1. Mechanical equipment nameplate data.

2. Selective demolition including:

a. Nondestructive removal of materials and equipment for reuse or salvage as indicated.

b. Dismantling mechanical materials and equipment made obsolete by these installations.

3. Excavation for underground utilities and services, including underground piping (under the building and from building to utility connection), basins, and equipment.

4. Miscellaneous metals for support of mechanical materials and equipment.

5. Joint sealers for sealing around mechanical materials and equipment; and for sealing penetrations in floors, and foundation walls.

6. Mechanical Identification of mechanical materials and equipment.

7. Painting of mechanical materials and equipment.

1.2 DEFINITIONS

A. The following definitions apply to excavation operations:

1. Additional Excavation: Where excavation has reached required subgrade elevations, if unsuitable bearing materials are encountered, continue excavation until suitable bearing materials are reached. The Contract Sum may be adjusted by an appropriate Contract Modification.

2. Subbase: as used in this Section refers to the compacted soil layer used in pavement systems between the subgrade and the pavement base course material.

3. Subgrade: as used in this Section refers to the compacted soil immediately below the slab or pavement system.

4. Unauthorized excavation consists of removal of materials beyond indicated subgrade elevations or dimensions without specific direction from the Architect/Engineer.

1.3 SUBMITTALS

A. General: Submit the following in accordance with Conditions of Contract, Division 1 Specification Sections, and Section 23 01 00.

B. Product data for the following products:

1. Joint sealers.

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C. Shop drawings detailing fabrication and installation for metal fabrications, and wood supports and anchorage for mechanical materials and equipment.

D. Coordination drawings for access panel and door locations.

E. Welder certificates, signed by Contractor, certifying that welders comply with requirements specified under "Quality Assurance" article of this Section.

F. Schedules indicating proposed methods and sequence of operations for selective demolition prior to commencement of Work. Include coordination for shut-off of utility services and details for dust and noise control.

1. Coordinate sequencing with construction phasing and Owner occupancy specified in Division 1 Section "Summary of Work."

1.4 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced Installer for the installation and application of joint sealers.

B. Qualify welding processes and welding operators in accordance with AWS D1.1 "Structural Welding Code - Steel."

1. Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver joint sealer materials in original unopened containers or bundles with labels informing about manufacturer, product name and designation, color, expiration period for use, pot life, curing time, and mixing instructions for multi-component materials.

B. Store and handle joint sealer materials in compliance with the manufacturers' recommendations to prevent their deterioration and damage.

1.6 PROJECT CONDITIONS

A. Conditions Affecting Selective Demolition: The following project conditions apply:

1. Protect adjacent materials indicated to remain. Install and maintain dust and noise barriers to keep dirt, dust, and noise from being transmitted to adjacent areas. Remove protection and barriers after demolition operations are complete.

2. Locate, identify, and protect mechanical services passing through demolition area and serving other areas outside the demolition limits. Maintain services to areas outside demolition limits. When services must be interrupted, install temporary services for affected areas.

B. Conditions Affecting Excavations: The following project conditions apply:

1. Maintain and protect existing building services which transit the area affected by selective demolition.

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2. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by excavation operations.

3. Site Information: Subsurface conditions were investigated during the design of the Project. Reports of these investigations are available for information only; data in the reports are not intended as representations or warranties of accuracy or continuity of conditions. The owner will not be responsible for interpretations or conclusions drawn from this information.

4. Existing Utilities: Locate existing underground utilities in excavation areas in accordance with Colorado State Law. If utilities are indicated to remain, support and protect services during excavation operations.

5. Remove existing underground utilities indicated to be removed.

a. Uncharted or Incorrectly Charted Utilities: Contact utility owner immediately for instructions.

b. Provide temporary utility services to affected areas. Provide minimum of 48-hour notice to Engineer prior to utility interruption.

6. Use of explosives is not permitted.

C. Environmental Conditions: Apply joint sealers under temperature and humidity conditions within the limits permitted by the joint sealer manufacturer. Do not apply joint sealers to wet substrates.

1.7 SEQUENCE AND SCHEDULING

A. Coordinate the shut-off and disconnection of utility services with the Owner and the utility company.

B. Notify the Architect/Engineer and Owner at least 5 days prior to commencing demolition operations.

C. Perform demolition in phases as indicated.

PART 2 - PRODUCTS

2.1 MECHANICAL EQUIPMENT NAMEPLATE DATA

A. Nameplate: For each piece of power operated mechanical equipment provide a permanent operational data nameplate indicating manufacturer, product name, model number, serial number, capacity, operating and power characteristics, labels of tested compliances, and similar essential data. Locate nameplates in an accessible location.

2.2 SOIL MATERIALS

A. Subbase Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, crushed slag, or natural or crushed sand.

B. Drainage Fill: Washed, evenly graded mixture of crushed stone, or crushed or uncrushed gravel, with 100 percent passing a 1-1/2 inch sieve, and not more than 5 percent passing a No.

4 sieve.

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C. Backfill and Fill Materials: Materials complying with ASTM D2487 soil classification groups GW, GP, GM, SM, SW, and SP; free of clay, rock, or gravel larger than 2 inches in any dimension;

debris; waste; frozen materials; and vegetable and other deleterious matter.

2.3 MISCELLANEOUS METALS

A. Steel plates, shapes, bars, and bar grating: ASTM A 36.

B. Cold-Formed Steel Tubing: ASTM A 500.

C. Hot-Rolled Steel Tubing: ASTM A 501.

D. Steel Pipe: ASTM A 53, Schedule 40, welded.

E. Nonshrink, Nonmetallic Grout: Premixed, factory-packaged, nonstaining, noncorrosive, nongaseous grout, recommended for interior and exterior applications.

F. Fasteners: Zinc-coated, type, grade, and class as required.

2.4 MISCELLANEOUS LUMBER

A. Framing Materials: Standard Grade, light-framing-size lumber of any species. Number 3 Common or Standard Grade boards complying with WCLIB or AWPA rules, or Number 3 boards complying with SPIB rules. Lumber shall be preservative treated in accordance with AWPB LP-2, and kiln dried to a moisture content of not more than 19 percent.

B. Construction Panels: Plywood panels; APA C-D PLUGGED INT, with exterior glue; thickness as indicated, or if not indicated, not less than 15/32 inches.

2.5 JOINT SEALERS

A. General: Joint sealers, joint fillers, and other related materials compatible with each other and with joint substrates under conditions of service and application.

B. Colors: As selected by the Architect from manufacturer's standard colors.

C. Elastomeric Joint Sealers: Provide the following types:

1. One-part, nonacid-curing, silicone sealant complying with ASTM C 920, Type S, Grade NS, Class 25, for uses in non-traffic areas for masonry, glass, aluminum, and other substrates recommended by the sealant manufacturer.

2. One-part, mildew-resistant, silicone sealant complying with ASTM C 920, Type S, Grade NS, Class 25, for uses in non-traffic areas for glass, aluminum, and nonporous joint substrates; formulated with fungicide; intended for sealing interior joints with nonporous substrates; and subject to in-service exposure to conditions of high humidity and temperature extremes.

3. Products: Subject to compliance with requirements, provide one of the following:

a. One-Part, Nonacid-Curing, Silicone Sealant:

1) "Chem-Calk N-Cure 2000," Bostic Construction Products Div.

2) "Dow Corning 790," Dow Corning Corp.

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3) "Silglaze N SCS 2501," General Electric Co.

4) "Silpruf SCS 2000," General Electric Co.

5) "864," Pecora Corp.

6) "Rhodorsil 5C," Rhone-Poulenc, Inc.

7) "Spectrum 1," Tremco, Inc.

8) "Spectrum 2," Tremco, Inc.

9) "Dow Corning 795," Dow Corning Corp.

10) "Rhodorsil 6B," Rhone-Poulenc, Inc.

11) "Rhodorsil 70," Rhone-Poulenc, Inc.

12) "Omnisea," Sonneborn Building Products Div.

13) "Chem-Calk 100," Bostic Construction Products Div.

14) "Gesil N SCS 2600," General Electric Co.

b. One-Part, Mildew-Resistant, Silicone Sealant:

1) "Dow Corning 786," Dow Corning Corp.

2) "SCS 1702 Sanitary," General Electric Co.

3) "863 #345 White," Pecora Corp.

4) "Rhodorsil 6B," Rhone-Poulenc, Inc.

5) "Proglaze White," Tremco, Inc.

6) "OmniPlus," Sonneborn Building Products Div.

D. Acrylic-Emulsion Sealants: One-part, nonsag, mildew-resistant, paintable complying with ASTM C 834 recommended for exposed applications on interior and protected exterior locations involving joint movement of not more than plus or minus 5 percent.

1. Products: Subject to compliance with requirements, provide one of the following:

a. "Chem-Calk 600," Bostic Construction Products Div.

b. "AC-2-," Pecora Corp.

c. "Sonolac," Sonneborn Building Products Div.

d. "Tremco Acrylic Latex 834," Tremco, Inc.

2.6 MECHANICAL IDENTIFICATION

A. General: Manufacturer’s standard products of categories and types required for each application as referenced in other Division 23 Sections. If more than one type is specified for application, selection is Installer’s option, but provide one selection for each product category.

B. Stencils: Standard stencils, prepared for required applications with letter sizes complying with recommendations of ASME A13.1 for piping and similar applications, but not less than 1-1/4-inch-high letters for ductwork and not less than 3/4-inch-high letters for access door signs and similar operational instructions.

1. Material: Fiberboard.

2. Material: Brass.

3. Stencil Paint: Standard exterior-type stenciling enamel; black, unless otherwise indicated; either brushing grade or pressurized spray-can form and grade.

4. Identification Paint: Standard identification enamel of colors indicated or, if not otherwise indicated for piping systems, comply with ASME A13.1 for colors.

C. Snap-on Plastic Pipe Markers: Manufacturer's standard preprinted, semirigid, snap on, color-coded, complying with ASME A13.1.

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D. Pressure-Sensative Pipe Markers: Manufacturer's standard preprinted, permanent adhesive, color-coded, pressure-sensitive vinyl, complying with ASME A13.1.

E. Engraved Plastic-Laminate Signs: ASTM D 709, Type I, cellulose, paper-base, phenolic-resin-laminate engraving stock; Grade ES-2, black surface, black phenolic core, with white melamine subcore, unless otherwise indicated.

1. Fabricate in sizes required for message.

2. Engrave with engraver’s standard letter style, of sizes and with wording to match equipment identification.

3. Punch for mechanical fastening.

4. Thickness: 1/16 inch, for units up to 20 sq. in. or 8 inches long; 1/8 inch for larger units.

5. Fasteners: Self-tapping stainless-steel screws or contact-type permanent adhesive.

F. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, minimum 6 inches wide and 4 mils thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored as follows:

1. Red: Electric.

2. Yellow: Gas, oil, steam, and dangerous materials.

3. Orange: Telephone and other communications.

4. Blue: Water systems.

5. Green: Sewer systems.

2.7 PAINTING, FINISHING

A. Painting of mechanical and electrical work exposed in occupied spaces, except mechanical and electrical machine rooms and maintenance/service space; and work exposed on the exterior is specified and performed under other divisions of these specifications.

B. Factory finishes, shop painting, and specil protective coatings are specified in the individual equipment specification sections.

C. Where factory finishes are provided on equipment and no additional field painting is specified, all marred or damaged surfaces shall be touched up or refinished so as to leave a smooth, uniform finish at the time of final inspection.

2.8 CONCRETE AND REINFORCEMENT

A. Concrete mixes shall be designed by the Contractor to produce the classes of concrete specified below. Concrete shall be Class A for reinforced concrete and shall be designed for a maximum compressive strength of 3000 psi at 28 days. Concrete shall be class B for nonreinforced work unless otherwise shown or specified and shall be designed for a minimum compressive strength of 2500 psi at 28 days. Design mix computations and test data shall be submitted for approval. Maximum size aggregate shall be 3/4 inch. Exterior concrete shall have air entrainment of 5 to 7 percent. Concrete quality, mixing, placing, of reinforcement shall conform to American Concrete Institute Publications ACI 318 and 347. Maximum dimension of slab between construction joints shall be 25 feet. All exposed construction joints shall be sealed with approved joint sealant.

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B. Reinforcement: Bars shall be deformed, grade 40 billet or axle steel, or grade 50 rail steel.

Mesh shall be welded steel wire fabric with wires at right angles to each other.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting installation and application of joint sealers and access panels. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2 PREPARATION FOR JOINT SEALERS

A. Surface Cleaning for Joint Sealers: Clean surfaces of joints immediately before applying joint sealers to comply with recommendations of joint sealer manufacturer.

B. Apply joint sealer primer to substrates as recommended by joint sealer manufacturer. Protect adjacent areas from spillage and migration of primers, using masking tape. Remove tape immediately after tooling without disturbing joint seal.

3.3 SELECTIVE DEMOLITION

A. General: Demolish, remove, demount, and disconnect abandoned mechanical materials and equipment indicated to be removed and not indicated to be salvaged or saved.

B. Materials and Equipment to be Salvaged: Remove, demount, and disconnect existing mechanical materials and equipment indicated to be removed and salvaged, and deliver materials and equipment to the location designated for storage by Owner.

C. Disposal and Cleanup: Remove from the site and legally dispose of demolished materials and equipment not indicated to be salvaged.

D. Mechanical Materials: Demolish, remove, demount, and disconnect the following items:

1. Inactive and obsolete piping, fittings and specialties.

a. Piping and ducts embedded in floors, walls, and ceilings may remain if such materials do not interfere with new installations. Remove materials above accessible ceilings. Drain and cap piping and ducts allowed to remain.

2. Perform cutting and patching required for demolition in accordance with Division 1 Section "Cutting and Patching."

3.4 EXCAVATION

A. Slope sides of excavations to comply with OSHA, local codes and ordinances. Shore and brace as required for stability of excavation.

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B. Shoring and Bracing: Establish requirements for trench shoring and bracing to comply with local codes and authorities. Maintain shoring and bracing in excavations regardless of time period excavations will be open.

1. Remove shoring and bracing when no longer required. Where sheeting is allowed to remain, cut top of sheeting at an elevation of 30 inches below finished grade elevation.

C. Install sediment and erosion control measures in accordance with local codes and ordinances.

D. Dewatering: Prevent surface water and subsurface or ground water from flowing into excavations and from flooding project site and surrounding area.

1. Do not allow water to accumulate in excavations. Remove water to prevent softening of bearing materials. Provide and maintain dewatering system components necessary to convey water away from excavations.

2. Establish and maintain temporary drainage ditches and other diversions outside excavation limits to convey surface water to collecting or run-off areas. Do not use trench excavations as temporary drainage ditches.

E. Material Storage: Stockpile satisfactory excavated materials where directed, until required for backfill or fill. Place, grade, and shape stockpiles for proper drainage.

1. Locate and retain soil materials away from edge of excavations. Do not store within drip-line of trees indicated to remain.

2. Remove and legally dispose of excess excavated materials and materials not acceptable for use as backfill or fill.

F. Excavation for Underground Tanks, Basins, and Mechanical Structures: Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10 foot; plus a sufficient distance to permit placing and removal of concrete formwork, installation of services, other construction, and for inspection.

1. Excavate, by hand, areas within drip-line of large trees. Protect the root system from damage and dry-out. Maintain moist conditions for root system and cover exposed roots with burlap. Paint root cuts of 1 inch in diameter and larger with emulsified asphalt tree paint.

2. Take care not to disturb bottom of excavation. Excavate by hand to final grade just before concrete reinforcement is placed.

G. Trenching: Excavate trenches for mechanical installations as follows:

1. Excavate trenches to the uniform width, sufficiently wide to provide ample working room and a minimum of 6 to 9 inches clearance on both sides of pipe and equipment.

2. Excavate trenches to depth indicated or required for piping to establish indicated slope and invert elevations. Beyond building perimeter, excavate trenches to an elevation below frost line.

3. Limit the length of open trench to that in which pipe can be installed, tested, and the trench backfilled within the same day.

4. Where rock is encountered, carry excavation below required elevation and backfill with a layer of crushed stone or gravel prior to installation of pipe. Provide a minimum of 6 inches of stone or gravel cushion between rock bearing surface and pipe.

5. Excavate trenches for piping and equipment with bottoms of trench to accurate elevations for support of pipe and equipment on undisturbed soil.

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a. For pipes or equipment 6 inches or larger in nominal size, shape bottom of trench to fit bottom 1/4 of the circumference. Fill unevenness with tampered sand backfill.

At each pipe joint over-excavate to relieve the bell or pipe joint of the pipe of loads, and to ensure continuous bearing of the pipe barrel on the bearing surface.

H. Cold Weather Protection: Protect excavation bottoms against freezing when atmospheric temperature is less than 35 degrees F (2 degrees C).

I. Backfilling and Filling: Place soil materials in layers to required subgrade elevations for each area classification listed below, using materials specified in Part 2 of this Section.

1. Under walks and pavements, use a combination of subbase materials and excavated or borrowed materials.

2. Under building slabs, use drainage fill materials.

3. Under piping and equipment, use subbase materials where required over rock bearing surface and for correction of unauthorized excavation.

4. For piping less than 30 inches below surface of roadways, provide 4-inch thick concrete base slab support. After installation and testing of piping, provide a 4-inch thick concrete encasement (sides and top) prior to backfilling and placement of roadway subbase.

5. Other areas, use excavated or borrowed materials.

J. Backfill excavation as promptly as work permits, but not until completion of the following:

1. Inspection, testing, approval, and locations of underground utilities have been recorded.

2. Removal of concrete formwork.

3. Removal of shoring and bracing, and backfilling of voids.

4. Removal of trash and debris.

K. Placement and Compaction: Place backfill and fill materials in layers of not more than 8 inches in loose depth for material compacted by heavy equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

L. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content. Compact each layer to required percentage of maximum dry density or relative dry density for each area classification specified below. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice.

M. Place backfill and fill materials evenly adjacent to structures, piping, and equipment to required elevations. prevent displacement of piping and equipment by carrying material uniformly around them to approximately same elevation in each lift.

N. Compaction: Control soil compaction during construction, providing minimum percentage of density specified for each area classification indicated below.

1. Percentage of Maximum Density Requirements: Compact soil to not less than the following percentages of maximum density for soils which exhibit a well-defined moisture-density relationship (cohesive soils), determined in accordance with ASTM D 1557 and not less than the following percentages of relative density, determined in accordance with ASTM D 2049, for soils which will not exhibit a well-defined moisture-density relationship (cohesionless soils).

a. Areas Under Structures, Building Slabs and Steps, Pavements: Compact top 12 inches of subgrade and each layer of backfill or fill material to 90 percent maximum density for cohesive material, or 95 percent relative density for cohesionless material.

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b. Areas Under Walkways: Compact top 6 inches of subgrade and each layer of backfill or fill material to 90 percent maximum density for cohesive material, or 95 percent relative density for cohesionless material.

c. Other Areas: Compact top 6 inches of subgrade and each layer of backfill or fill material to 85 percent maximum density for cohesive soils, and 90 percent relative density for cohesionless soils.

2. Moisture Control: Where subgrade or layer of soil material must be moisture conditioned before compaction, uniformly apply water. Apply water in minimum quantity necessary to achieve required moisture content and to prevent water appearing on surface during, or subsequent to, compaction operations.

O. Subsidence: Where subsidence occurs at mechanical installation excavations during the period 12 months after Substantial completion, remove surface treatment (i.e., pavement, lawn, or other finish), add backfill material, compact to specified conditions, and replace surface treatment. Restore appearance, quality, and condition of surface or finish to match adjacent areas.

3.5 ERECTION OF METAL SUPPORTS AND ANCHORAGE

A. Cut, fit, and place miscellaneous metal fabrications accurately in location, alignment, and elevation to support and anchor mechanical materials and equipment.

B. Field Welding: Comply with AWS "Structural Welding Code."

3.6 APPLICATION OF JOINT SEALERS

A. General: Comply with joint sealer manufacturers' printed application instructions applicable to products and applications indicated, except where more stringent requirements apply.

1. Comply with recommendations of ASTM C 962 for use of elastomeric joint sealants.

2. Comply with recommendations of ASTM C 790 for use of acrylic-emulsion joint sealants.

B. Tooling: Immediately after sealant application and prior to time shinning or curing begins, tool sealants to form smooth, uniform beads; to eliminate air pockets; and to ensure contact and adhesion of sealant with sides of joint. Remove excess sealants from surfaces adjacent to joint.

Do not use tooling agents that discolor sealants or adjacent surfaces or are not approved by sealant manufacturer.

3.7 INSTALLATION OF CONCRETE AND REINFORCEMENT

A. Reinforcement: Reinforcement shall be supported off the floor or ground during placement of concrete. Exposed ends of bars shall be protected with plastic caps when not working immediately in or around the site if exposed to the public

B. Testing: The Contractor shall make for test purposes one set of three cylinders taken for each day's pour. The test cylinders shall be made and cured in accordance with ASTM Standard C

31. Two cylinders shall be tested by the Contractor in accordance with ASTM Standard C 39.

The test result shall be the average of the strengths of the two cylinders. If the average strength of the cylinders falls below the minimum allowable strength, such changes may be required in the proportions of the concrete mix as will be necessary to obtain the required strength. One cylinder shall be stored by the Contractor for future testing for check tests.

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C. Finishing: Finishes shall be as specified below. The dusting of surfaces with cement will not be permitted.

1. Rough Slab Finish: Slabs to receive fill and mortar setting beds shall be finished by screeding with straightedges to bring the surface to the required finish with no coarse aggregate visible. In addition, roof slabs and slabs to receive membrane waterproofing shall be floated to produce a reasonably true and uniform surface and shall be slightly steel troweled.

2. Broomed Finish: Exterior concrete slabs shall be screeded and floated to bring the surface to the required finish level with no coarse aggregate visible, steel-troweling to an even smooth surface, and brooming with a fiber-bristle brush in a direction transverse to that of the main traffic.

D. Curing: Immediately after placing or finishing, concrete surfaces not covered by forms shall be protected against moisture loss for not less than seven days. Curing shall be accomplished by moist curing, waterproof paper or polyethylene sheet curing or membrane curing. Membrane curing compound shall be applied as recommended by the manufacturer. Compound shall not be used on surfaces that are to receive any subsequent treatment that depends upon adhesion or bonding to the concrete.

END OF SECTION 23 05 00

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SECTION 23 05 25 – INDUSTRIAL VALVES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. This Section includes the following general-duty valves:

1. Triple Offset Rotary Valves.

2. Cast Steel Gate Valves.

3. Forged Steel Globe Valves.

B. Related Sections include the following:

1. Division 23 Section "Mechanical Identification" for valve tags and charts.

1.3 DEFINITIONS

A. The following are standard abbreviations for valves:

1. CWP: Cold working pressure.

2. SWP: Steam working pressure.

1.4 SUBMITTALS

A. Product Data: For each type of valve indicated. Include body, seating, and trim materials; valve design; pressure and temperature classifications; end connections; arrangement; dimensions;

and required clearances. Include list indicating valve and its application. Include rated capacities; shipping, installed, and operating weights; furnished specialties; and accessories.

1.5 QUALITY ASSURANCE

A. ASME Compliance: ASME B31.1 for power piping valves.

B. ASME Compliance for Ferrous Valves: ASME B16.10 and ASME B16.34 for dimension and design criteria.

C. ANSI Compliance: ANSI B16.5 Steel pipe flanges and flange fittings.

D. MSS Compliance: MSS-SP-25 Standard marking systems for valves.

E. MSS Compliance: MSS-SP-55 Quality standard for steel casting.

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F. MSS Compliance: MSS-SP-61 Pressure testing of steel valves.

G. MSS Compliance: MSS-SP-68 High pressure offset disc butterfly valves

1.6 DELIVERY, STORAGE, AND HANDLING

A. Prepare valves for shipping as follows:

1. Protect internal parts against rust and corrosion.

2. Protect threads, flange faces, and weld ends.

3. Set angle, gate, and globe valves closed to prevent rattling.

4. Set ball and plug valves open to minimize exposure of functional surfaces.

B. Use the following precautions during storage:

1. Maintain valve end protection.

2. Store valves indoors and maintain at higher than ambient dew-point temperature. If outdoor storage is necessary, store valves off the ground in watertight enclosures.

C. Use sling to handle large valves; rig sling to avoid damage to exposed parts. Do not use handwheels or stems as lifting or rigging points.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the manufacturers specified.

2. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified.

2.2 VALVES, GENERAL

A. Refer to Part 3 "Valve Applications" Article for applications of valves.

B. Ferrous Valves: NPS 2-1/2 and larger with butt-weld ends, unless otherwise indicated.

C. Valve Pressure and Temperature Ratings: Not less than indicated and as required for system pressures and temperatures.

D. Valve Sizes: Same as upstream pipe, unless otherwise indicated.

E. Valve Actuators:

1. Gear Drive: For quarter-turn valves NPS 3 and larger.

2. Handwheel: For valves other than quarter-turn types.

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F. Valve Bypass and Drain Connections: MSS SP-45.

2.3 TRIPLE OFFSET ROTARY VALVES

A. Manufacturers:

1. Triple Offset Rotary Valves:

a. Vanessa

b. Adams

c. Zwick

B. Class 300 on the distribution system outside the heating plant and class 600 in the heating plant, cast or fabricated carbon steel body. Valve design shall comply with ANSI B16.34.

Tripple offset design, guided adjustable packing box, non-rubbing resilient metal to metal seat with bi-directional bubletight shutoff. Valves shall have a turndown ratio of 100 to 1. Furnish valves with the following:

1. Body: ASTM A216, Grade WCB with cobalt based hard facing.

2. Disc: ASTM A351, Grade CF8M stainless steel.

3. Disc Seals: Torque seated elliptical seating systems with field replaceable laminated stainless steel and graphite seal.

4. Seal Retainer Ring: ASTM A240 type 316 stainless steel.

5. Shaft: ASTM A479 type XM19.

6. Packing Material: Die formed graphite rings with braided graphite end rings.

7. End Connections: Butt-weld.

8. Operator: Bevel gear drive with handwheel.

9. Drain and Bypass Connections: In accordance with MSS SP-45 with forged steel globe valve as specified under paragraph “Forged Steel Valves”.

2.4 CAST STEEL GATE VALVES

A. Manufacturers:

1. Cast Steel Gate Valves:

a. DSI, ZY Tech Glogal Industries.

b. Newco.

c. Velan.

d. Walworth

B. Class 300 Cast steel body complying with ANSI/ASME B16.34. Valve design shall be outside screw and yoke, bolted bonnet, rising stem, yoke sleeves with anti-friction bearings, flexible wedge, and threaded (renewable) seats. Furnish valves with the follows:

1. Body and Bonnet: Carbon steel, ASTM A216, Grade WCB.

2. Seating Trim: 13% chromium stainless steel to cobalt based hard facing.

3. Packing Material: Flexible graphite rings with braided graphite end rings and zinc corrosion inhibitor.

4. End Connections:

a. Butt-Weld

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5. Operator: Malleable Iron Handwheel.

6. Drain and Bypass Connections: In accordance with MSS SP-45 and the “Valve

Schedule” on the drawings with forged steel globe valve as specified under paragraph “Forged Steel Valves”.

2.5 FORGED STEEL GLOBE VALVES

A. Manufacturers:

1. Forged Steel Globe Valves:

a. Anvil

b. Bonney Forge

c. Newco

d. RP&C Valve

e. Smith

f. Velan

g. Vogt

B. Forged Steel Globe Valves: Class 800 forged steel body. Valve design shall be straight or y-pattern, conventional port, bolted bonnet with spiral wound gaskets, outside screw and yoke, rising stem and integral seats. Furnish valves with the following trim:

1. Body: Low carbon steel, ASTM A105.

2. Trim: 13% Chrome stainless steel to cobalt based hard facing.

3. Packing Material: Graphite with braided graphite end rings and zinc corrosion inhibitor.

4. End Connections: Socket welded.

5. Operator: Malleable iron handwheel, ASTM A47.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine piping system for compliance with requirements for installation tolerances and other conditions affecting performance.

1. Proceed with installation only after unsatisfactory conditions have been corrected.

B. Examine valve interior for cleanliness, freedom from foreign matter, and corrosion. Remove special packing materials, such as blocks, used to prevent disc movement during shipping and handling.

C. Operate valves in positions from fully open to fully closed. Examine guides and seats made accessible by such operations.

D. Do not attempt to repair defective valves; replace with new valves.

3.2 VALVE APPLICATIONS

A. Refer the “Valve Schedule” for specific valve applications. If valve applications are not indicated, use the following:

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1. Shutoff Service: Gate, or triple offset rotary valves.

2. Throttling Service: Globe or triple offset rotary valves.

B. If valves with specified SWP classes or CWP ratings are not available, the same types of valves with higher SWP class or CWP ratings may be substituted.

C. High Temperature Hot Water Piping: Use the following types of valves:

1. Gate Valves, NPS 2 and Larger: Class 300 cast steel, butt-welded ends.

2. Globe Valves, NPS 2 and Smaller: Class 800 forged steel, socket-welded ends.

3. Triple Offset Rotary Valves, NPS 3 and Larger: Class 300 on the distribution system outside the heating plant and class 600 inside the heating plant, cast steel, butt-welded ends.

D. Select valves, except flangeless types, with the following end connections:

1. For Steel Piping, NPS 1-1/2 and Smaller: Socket-welded ends…