Northwest HS Generator Replacement - Bid Specs (03.26.24).pdf

Northwest HS Generator & Electrical Equipment Replacement TOC - 1 ©2024 James Posey Associates, Inc. 7911-23

Northwest High School Generator and Electrical Equipment Replacement

Table of Contents

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

DOCUMENT PAGES

00 0107 Seals Page 00 0107 - 1-2

DIVISION 23 � HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC)

SECTION PAGES

23 0101 HVAC General Provisions 23 0101 - 1-9 23 0500 Common Work Results for HVAC 23 0500 - 1-7 23 0501 Excavation and Fill for HVAC Work 23 0501 - 1-4 23 0504 HVAC Demolition 23 0504 - 1-2 23 0529 Hangers and Supports for HVAC Piping and Equipment 23 0529 - 1-6 23 1123 Natural-Gas Piping 23 1123 - 1-10

DIVISION 26 - ELECTRICAL

SECTION PAGES

26 0101 Electrical General Provisions 26 0101 - 1-9 26 0500 Common Work Results for Electrical 26 0500 - 1-4 26 0501 Excavation and Fill for Electrical Work 26 0501 - 1-4 26 0504 Electrical Demolition 26 0504 - 1-2 26 0507 Firestopping for Electrical Work 26 0507 - 1-5 26 0519 Wires and Cables 26 0519 - 1-7 26 0521 Wiring Connections 26 0521 - 1-1 26 0526 Grounding and Bonding 26 0526 - 1-4 26 0528 Equipment Foundations 26 0528 - 1-2 26 0533 Conduits 26 0533 - 1-9 26 0534 Boxes 26 0534 - 1-2 26 0535 Surface Raceways 26 0535 - 1-2 26 0544 Underground Ducts 26 0544 - 1-4 26 0553 Identification for Electrical Systems 26 0553 - 1-7 26 0573 Overcurrent Protective Device Studies 26 0573 - 1-5 26 2200 Transformers 26 2200 - 1-4 26 2416 Panelboards 26 2416 - 1-7 26 2550 Generator Docking Station 26 2550 - 1-3 26 2726 Wiring Devices 26 2726 - 1-3 26 2800 Enclosed Circuit Protective Devices 26 2800 - 1-2 26 2813 Fuses 26 2813 - 1-2 26 2914 Enclosed Motor Controllers 26 2914 - 1-3 26 3213 Generators, Weather-Protected 26 3213 - 1-14 26 3600 Transfer Switches 26 3600 - 1-9 26 4313 Surge Protective Devices 26 4313 - 1-3

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DIVISION 28 � ELECTRONIC SAFETY AND SECURITY

SECTION PAGES

28 3100 Fire Detection and Alarm Systems 28 3100 - 1-4

Northwest HS Generator & Electrical Equipment Replacement HVAC General Provisions ©2024 James Posey Associates, Inc. 7911-23 23 0101 - 1

SECTION 23 0101

HVAC GENERAL PROVISIONS

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. General provisions and requirements for all HVAC work.

1.2 RELATED SECTIONS

A. Requirements of this section generally supplement requirements of Division 01.

1.3 REFERENCES

A. NFPA 10: Portable Fire Extinguishers.

B. NFPA 241: Safeguarding Construction, Alteration, and Demolition Operations.

1.4 SYSTEM DESCRIPTION

A. The full set of Contract Documents applies to work of Division 23.

B. Visit the site and study all aspects of the project and working conditions, as required by General and Supplementary Conditions, Bidding and Contracting Requirements, Drawings, and Specifications. Verify field dimensions.

C. The work covered in technical sections includes the furnishing of all labor, equipment and materials, and the performance of all operations pertinent to the work described.

D. Except as required otherwise in Division 01, promptly obtain and pay for, including all necessary signatures and paperwork, all permits, fees and inspections required for work of this division by authorities having jurisdiction, including any utility connection or extension charge. No payment will be made until a copy of the permit is forwarded to the Owner. Contractor shall obtain and pay all fees for the mechanical permit.

E. HVAC work of this project includes, as a brief general description, the following:

1. Gas piping for emergency generator replacement.

1.5 PRODUCT OPTIONS

A. Except as modified by provisions of Bidding and Contracting Requirements and Division 01, these options apply to Division 23 specifications.

B. General: Where Contractor is permitted to use a product other than the specified item and model named as the basis of design, Contractor is responsible for all coordination and additional costs as specified in the article �Substitutions,� below for substitutions.

C. Products specified by reference standards or by description only: Any product meeting those standards or description.

D. Products specified by naming one or more manufacturers, or model name or catalog reference number: Products specified establish a standard of quality, options to be included, and performance.

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1. Where other acceptable manufacturers are named, Contractor may provide products of those named manufacturers only, which meet the specifications.

2. Where specification permits �equal� products, without naming other acceptable manufacturers, Contractor may use products of any manufacturer, which meet the specifications.

E. Products specified by naming one manufacturer and particular product, with no provision for other options: No options or substitutions allowed.

1.6 SUBSTITUTIONS

A. Substitutions will be considered only as permitted or required by the Bidding and Contracting Requirements and Division 01. Except as modified by those requirements, the requirements below apply to Division 23 specifications.

B. Substitutions may be considered when a product becomes unavailable through no fault of the Contractor.

C. Document each request with complete data substantiating compliance of proposed substitution with contract documents.

D. A request constitutes a representation that the Bidder or Contractor:

1. Has investigated proposed product and determined that it meets or exceeds the quality level of the specified product.

2. Will provide the same warranty for the substitution as for the specified product.

3. Will coordinate installation and make changes to other work which may be required for the work to be complete with no additional cost to Owner.

4. Waives claims for additional costs or time extension which may subsequently become apparent.

5. Will reimburse Owner for review or redesign services associated with re-approval by authorities.

E. Substitutions will not be considered when they are indicated or implied on shop drawing or product data submittals, without separate written request, or when acceptance will require revision to the Contract Documents.

F. Substitution submittal procedure is specified in Bidding and Contracting Requirements and Division 01.

1.7 MATERIALS AND EQUIPMENT

A. All materials and equipment shall be new and the best of their respective kinds, suitable for the conditions and duties imposed on them by the project, and of representative manufacture. The description, characteristics and requirements of the materials to be used shall be in accordance with the specifications.

B. All equipment, construction and installation must meet requirements of local, state and federal governing codes.

C. Singular number: In cases where material, a device, or part of the equipment is referred to in the singular number in the specifications, it is intended that such reference shall apply to as many items of material, devices, or parts of the equipment as are required to complete the installation as shown on the drawings or required for proper operation of the system.

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D. Terms have the following meanings:

1. Furnish: Supply item

2. Install: Mount and connect item

3. Provide: Furnish and install.

E. All materials and equipment shall be installed and completed in a first class and workmanlike manner and in accordance with the best modern methods, practice and manufacturers� instructions. Any work which shall not present an orderly and neat or workmanlike appearance shall be removed and replaced with satisfactory work when so directed in writing by the Architect.

F. The specifications and drawings are intended to define the minimum requirements, as to quality of materials, construction, finish and overall workmanship.

G. General Conditions describe the correlation and intent of the Contract Documents. In case of discrepancies between the specifications and drawings, the specifications should be followed as to the general methods and principles and the drawings followed as to sizes, capacities and specifics for corresponding parts. If sizes are omitted, the Architect will determine sizes to be utilized.

H. In all cases of doubt, uncertainty, or conflict as to the true meaning of the specifications or drawings, it is the responsibility of the Contractor to notify the Architect of said uncertainty, doubt, or conflict and obtain a decision as to the intent before starting any work which may be affected by this decision.

1.8 COORDINATION

A. Should a situation develop during construction to prevent the proper installation of any equipment or item where shown on the drawings, call the situation to the attention of the Architect and await a written decision.

B. Plan and coordinate all work to proceed in an orderly and continuous manner without undue delay, and in conformance with project schedule. Submit samples, shop drawings, schedules, insurance policies and certificates, and the like in time to avoid delays in actual construction.

Coordinate HVAC work so that work of each trade is completed before other construction begins which would obstruct it.

1. Perform work in compliance with approved coordination drawings specified in �Submittals� below.

2. Install mechanical and plumbing piping as high as possible in mechanical rooms.

C. Coordinate trades to ensure that proper clearances between work of the various trades allow access to items which require operation and maintenance.

D. Coordinate location and elevation of all piping, ductwork, light fixtures, equipment, and appurtenances in such a manner that the finished installation is as indicated on drawings. In the event difficulties are encountered which prevent this, it is the Contractor�s responsibility to bring this to the attention of the Architect prior to initiation of work. Correct improperly coordinated installation at no additional cost.

E. The Contractors� assistants shall include a competent foreman, who shall be on the premises at all times to check, lay out, coordinate and superintend the installation of work. The foreman shall establish all grades and lines relative to the work before starting, and be responsible for the accuracy thereof.

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F. For HVAC equipment located above ceilings, coordinate installation of all work above that ceiling such that service clearances are maintained. Install HVAC no more than two feet above the finished ceiling.

1.9 SUBMITTALS

A. Manufacturers� and subcontractors� lists:

1. As specified in Division 01, submit a complete list of proposed manufacturers for all equipment, materials and subcontractors used for the work of this division. Lists shall follow the sequence of the specifications. No considerations will be given for partial or incomplete lists. After review of lists, submit shop drawings and product data.

B. Shop drawings and product data:

1. Submit in accordance with the requirements of Division 01 or as established at the preconstruction conference, the required number of copies of shop drawings and product data for every item of equipment. Shop drawings or product data will not be considered until manufacturers� lists have been approved. Shop drawings and product data shall be submitted, as required by the General Conditions, with sufficient time for checking, return to Contractor, and resubmission as required before Contractor shall install any item.

2. Each item submitted shall be properly labeled, indicating the specific service for which the equipment or material is to be used, section and paragraph number of specification or drawing number to which it applies, Contractor�s name and project name and number. Data submitted shall be specific and shall include product data and printed information in sufficient detail and scope to verify compliance with requirements of the contract documents. Clearly identify each item within the data. Data of a general nature will not be accepted. Each sheet must clearly show the project name and number.

3. The review of a shop drawing or product data shall not be considered as a guarantee of the measurements or building conditions or that the shop drawings or product data have been checked to see that item submitted properly fits the building conditions. This review shall not relieve the Contractor of the responsibility for furnishing material or performing work as required by the contract documents, for correctness of dimensions and quantities, or for proper coordination of details and interfaces among trades.

4. All exclusively electrical items furnished as items associated with mechanical items but not specifically described in the mechanical item submission, shall be submitted as a separate submittal but shall be clearly marked as associated with the mechanical item by identification specification paragraph.

5. Product data sheets shall be 8.5-inches by 11-inches cut sheets for operating and maintenance manual.

6. Provide submittal compliance cover letter for each project submittal indicating compliance with the contract documents. Sample compliance cover letter is included at the end of this section for reference.

C. Submit at least three copies of the results of every test required under any section in this division.

D. Specialist shall submit a list of at least three projects similar to this project in type, size, and quality, which have been in place and operating satisfactorily for at least five years.

1. Include project name, address, name and phone number of owner�s representative, and project type and size.

E. After the work is completed, submit all required certificates of approval from approved inspection agencies and authorities having jurisdiction over work of this division. Certificates of approval must be received by the Architect prior to final acceptance of the work.

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1.10 SPECIALIST

A. The term �Specialist� as used in the specification shall mean an individual or firm of established reputation (or, if newly organized, whose personnel have previously established a reputation in the same field,) which is regularly engaged in, and which maintains a regular force of workers skilled in either (as applicable) manufacturing or fabricating items required by the contract, installing items required by the contract, or otherwise performing work required by the contract.

Where the specification requires installation by a specialist, the term shall also be deemed to mean the manufacturer of the item, an individual or firm licensed by the manufacturer, or an individual or firm who will perform the work under the manufacturer�s direct supervision.

1.11 CONTRACT CLOSEOUT SUBMITTALS

A. Project record documents:

1. Maintain on site one set of the following record documents; record actual revisions to the work of this division:

a. Contract drawings.

b. Specifications.

c. Addenda.

d. Change orders and other modifications to the Contract.

e. Reviewed shop drawings, product data, and samples.

2. Maintain record documents separate from documents used for construction.

3. Record information concurrent with construction progress.

4. Specifications: Legibly mark and record in each section a description of actual products installed, including the following:

a. Manufacturer�s name and product model and number.

b. Product options, substitutions, or alternates utilized.

c. Changes made by addenda and modifications.

5. Record documents and shop drawings: Legibly mark each item to record actual construction, including:

a. Measured horizontal and vertical locations of underground utilities and appurtenances, referenced to permanent surface improvements.

b. Measured locations of internal utilities and appurtenances concealed in construction, referenced to visible and accessible features of the work.

c. Field changes of dimension and detail.

d. Details not on original Contract Drawings.

6. Submit documents as specified in Division 01.

1.12 REGULATORY REQUIREMENTS

A. When these specifications call for materials or construction of a better quality or larger sizes than required by the following codes and standards, the provisions of the specifications shall take precedence.

B. Provide, without extra charge, any additional materials and labor which may be required for compliance with these codes and standards even though the work is not mentioned in these specifications or shown on the contract drawings.

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C. Perform the work of this division in strict accordance with the following authorities. The latest revision of these codes accepted by the authority having jurisdiction as of the date of the contract documents shall apply.

1. The plumbing, mechanical, electrical, building, fire, and safety codes of the state and county or city in which the work is being performed.

2. The National Electric Code, NFPA 70 (NEC).

3. The National Fire Protection Association Code. (NFPA).

4. International Energy Conservation, Fire, Fuel Gas, Mechanical, and Plumbing Codes (ICC).

D. All equipment displays shall indicate English units.

1.13 REFERENCE STANDARDS

A. Perform the work of this division using the standards of the following organizations, as referred to in technical sections, as a minimum requirement for construction and testing. Unless specified otherwise in Bidding and Contract Documents or Division 01, the latest revision current as of the date of the contract documents shall apply. Products shall be certified by manufacturers to meet the requirements of referenced standards.

1. Air Conditioning and Refrigeration Institute (ARI)

2. Air Movement and Control Association (AMCA)

3. Associated Air Balance Council (AABC)

4. American Association State Highway and Transportation Officials (AASHTO)

5. American National Standards Institute (ANSI)

6. American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE)

7. ASME International (ASME)

8. American Society for Testing and Materials (ASTM)

9. American Society of Sanitary Engineering (ASSE)

10. American Water Works Association (AWWA)

11. International Code Council (ICC)

12. Manufacturer�s Standardization Society of the Valve and Fittings Industry Inc. (MSS)

13. National Electrical Code, NFPA 70 (NEC)

14. National Electrical Manufacturer�s Association (NEMA)

15. National Fire Protection Association (NFPA)

16. National Fuel Gas Code, NFPA 54

17. National Sanitary Foundation (NSF)

18. National Standard Plumbing Code (NSPC)

19. The Occupational Safety and Health Act (OSHA)

20. Piping and Drainage Institute (PDI)

21. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA)

22. Underwriters Laboratory Inc. (UL)

23. Maryland Occupational Safety and Health Act (MOSHA)

1.14 TEMPORARY STORAGE

A. Maintain upon premises, where directed, a storage area, and be responsible for all contents within these areas. Provide all security measures necessary for this area.

B. Area shall be maintained and shall be returned to original condition at the completion of the project.

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1.15 PROTECTION

A. Control dust resulting from construction work to prevent its spread beyond the immediate work area, and to avoid creation of a nuisance.

1. Do not use water to control dust. Use drop cloths or other suitable barriers.

2. In areas where dirt or dust is produced as a result of the work, sweep daily, or more often as required.

3. Provide walk-off mats at entries and replace them at regular intervals.

4. Construct dust partitions, where indicated on the drawings or as required.

5. Protect areas occupied by Owner's personnel or equipment.

6. Seal off all return air registers and other mechanical systems to prevent dust from entering.

B. Each trade and subcontractor is responsible for preventing damage and soiling of work performed by other trades or subcontractors. Each trade and subcontractor is responsible for providing temporary protection of its own work.

1. Protect work from spills, splatters, drippings, adhesives, bitumens, mortars, paints, plasters, and damage from welding or burning.

2. Protect finished work from damage, defacement, staining, or scratching.

3. Protect finishes from cleaning agents, or grinding and finishing equipment.

4. Protect adjacent and finished work from damage, using tape, masking, covers or coatings and protective enclosures.

5. Coordinate installations and temporarily remove items to avoid damage from finishing work.

C. Repair all damage or soiling to the complete satisfaction of the Architect; replace any materials or work damaged to such an extent that they cannot be restored to their original condition, all at no addition to the Contract Sum.

D. Protect work stored in place and supplies stored in the building.

E. All equipment shall be covered during shipping and wrapped prior to leaving factory.

F. Use of sidewalk or roadway areas outside of the property lines shall be with permission and approval of the local authorities having jurisdiction.

1.16 FIRE PROTECTION

A. As a minimum, provide hand-carried, portable, UL-rated extinguishers with each work crew working inside the building.

B. Select extinguishers in accordance with NFPA 10 and NFPA 241 for classification, extinguishing agent, and size required by location and class of fire exposure.

1.17 PROJECT CONDITIONS

A. Drawings showing utilities in concealed locations are based on the best information available but are not represented as being precisely correct. Work of the contract includes digging, cutting, drilling, using nondestructive methods, and other methods of locating concealed utilities in the field, as well as patching and repairing as specified in �Cutting and Patching� below.

B. If, in the course of the work, workers encounter a material they suspect to present some hazard:

1. Promptly notify the Owner and Architect in writing.

2. Do not perform any work which would disturb the suspected material until written instructions have been received.

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1.18 WARRANTY

A. All work and equipment provided as work of this division shall be fully warranted under the general project warranty, which shall include a 2 year/24 hour/7 day full parts and labor warranty for all mechanical work and equipment.

B. During the correction period, the Contractor shall begin correcting any work found to be not in accordance with the requirements of the Contract Documents within 4-hours of receiving written notice from the Owner. Provide detailed schedule for completion of work within 24-hours of receiving written notice from the Owner and revise schedule based on any Owner comments generated. Except as otherwise required in General Conditions and Division 01, the correction period is two years after the date of substantial completion of the work. Work requiring correction shall promptly be repaired or completely replaced at no addition to the Contract Sum.

C. Special warranties are warranties required by individual specification sections, incidental product warranties, manufacturers� standard warranties, installer or subcontractor service agreements, and other individual warranties in addition to the general project warranty.

D. Provide copies of warranties as required for Operation and Maintenance Manual specified above, and by Division 01.

E. For items of work delayed beyond date of substantial completion, provide updated submittal within ten days after acceptance, listing date of acceptance as start of warranty period.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 CUTTING AND PATCHING

A. General: Employ skilled workers to perform cutting and patching. Proceed with cutting and patching at the earliest feasible time, and complete without delay.

B. Cut walls, floors, partitions, roofs, and other appurtenances for the passage or accommodation of pipes, ducts and appurtenances. Close superfluous openings and remove all debris caused by work of this division.

C. No cutting of any structure or finish shall be done until the condition requiring such cutting has been examined and approved by the Architect.

D. New or existing surfaces disturbed as a result of such cutting or otherwise damaged shall be restored to match original work and all materials used for any patching or mending shall conform to the class of materials originally installed.

E. Refinish surfaces to match adjacent finish. For continuous surfaces, refinish to nearest intersection or natural break. For an assembly, refinish entire unit.

3.2 PROGRESS MEETINGS

A. Progress meetings shall be held as specified in Division 01, and also when and if the Contractor or Architect finds them necessary or advantageous to progress of work.

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B. Contractor, those subcontractors and those material suppliers concerned with current progress or with the scheduling of future progress, Architect and Owner shall each be represented at these meetings by persons familiar with the details of work and authorized to conclude matters relating to work progress.

END OF SECTION

Northwest HS Generator & Electrical Equipment Replacement Common Work Results for HVAC ©2024 James Posey Associates, Inc. 7911-23 23 0500 - 1

SECTION 23 0500

COMMON WORK RESULTS FOR HVAC

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Requirements applicable to more than one section of Division 23.

B. Basic material and equipment required for the HVAC piping work.

C. Identification of HVAC systems.

D. Cleaning and painting.

E. Operating instructions.

F. Piping tests.

1.2 RELATED SECTIONS

A. Project and special warranties: Division 01 and Section 23 0101.

B. Operation and Maintenance Manuals: Division 01 and Section 23 0101.

C. Painting: Division 09.

1.3 REFERENCES

A. American Society of Mechanical Engineers

1. ASME Boiler and Pressure Vessel Code

2. ASME A 13.1: Scheme for the Identification of Piping Systems

3. ASME B 31.1: Power Piping

4. ASME B 31.9: Building Services Piping

B. American Society of Testing and Materials

1. ASTM A 234: Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

2. ASTM B 32: Standard Specification for Solder Metal

3. ASTM B 88: Standard Specification for Seamless Copper Water Tube

4. ASTM B 813: Standard Specification for Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube

5. ASTM D 635: Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position

6. ASTM E 84: Standard Test Method for Surface Burning Characteristics of Building Materials

7. ASTM E 548: Standard Guide for General Criteria Used for Evaluating Laboratory

Competence

8. ASTM D 2564: Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC)

Plastic Piping Systems

9. ASTM F 656: Standard Specification for Primers for use in Solvent Cement Joints of Poly

(Vinyl Chloride) (PVC) Plastic Pipe and Fittings

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C. American Welding Society

1. AWS D1.1: Structural Welding - Steel

2. AWS D10.9: Specification for Qualification of Welding Procedures and Welders for Piping and Tubing

3. AWS QC1: Specification for AWS Certification of Welding Inspectors

1.4 DEFINITIONS

A. Project correction period: A period after Substantial Completion of the work during which the Contractor shall correct every part of the work found to be not in accordance with the requirements of the contract documents, promptly after receipt of written notice.

B. Qualified testing agency: An NRTL, an NVLAP, or an independent agency with the experience and capability to conduct testing and inspecting indicated, as documented according to ASTM E 548; and with additional qualifications specified in individual sections; and where required by authorities having jurisdiction, that is acceptable to authorities.

1. NRTL: A nationally recognized testing laboratory according to 29 CFR 1910.7.

2. NVLAP: A testing agency accredited according to NIST's National Voluntary Laboratory

Accreditation Program.

C. DN: Dimension Nominale, nominal pipe size in millimeters, in accordance with the metric system for construction, Systeme Internationale (SI).

D. NPS: Nominal pipe size in inches, in accordance with standard U.S. designations for manufactured pipe. Pipe sizes do not change when projects are designed and built in metric units; each size has a consistent name (nominal dimension) in each system.

1.5 DESIGN REQUIREMENTS

A. The drawings and system performances have been designed based on the use of the particular manufacturer�s products specified and scheduled on the drawings.

B. Products of other manufacturers that are listed under the article "Acceptable Manufacturers," or permitted as "equal," are permitted provided:

1. Product shall meet the specifications.

2. Contractor shall make, without addition to the contract sum, all adjustments for deviations so that the final installation is complete and functions as the design basis product is intended.

C. Do not propose products with dimensions or other characteristics different from the design basis product that render their use impractical, or cause functional fit, access, or connection problems.

1.6 SUBMITTALS

A. Shop drawings:

1. Schedule of welding and brazing procedures proposed for each piping system in the project.

2. Shop drawings of backboards for piping specialties.

B. Certifications: Proof of operator and testing agency personnel qualifications as required for welding and brazing in the article "Quality Assurance" below.

C. Test reports: Field test results for each piping system as specified in Part 3 below.

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D. Demonstration and Training Plan: Plan indicating number of hours and topics of discussion for in-classroom and on-site training as specified in Part 3 below.

1.7 QUALITY ASSURANCE

A. Provide materials and perform work in accordance with the plumbing, mechanical, electrical, building, fire, health and safety, and other applicable codes and regulations of the state, county or city in which the work is performed.

B. Welding procedures and operator qualifications for structural welding: AWS D1.1, Structural Welding Code Steel, electric arc process.

C. Welding, brazing, and soldering procedures and operator qualifications for building systems piping:

1. AWS D10.9, Qualification of Welding Procedures and Welders for Piping and Tubing.

2. ASME B31.9, Building Services Piping.

3. Copper Development Association "Copper Tube Handbook."

D. Qualifications of independent testing laboratory personnel:

1. Welding inspectors: AWS QC1, Certification of Welding Inspectors.

2. Nondestructive evaluation personnel: American Society for Nondestructive Testing

Recommended Practice.

E. VOC content: Field-applied adhesives and sealants, limits per South Coast Air Quality Management District (SCAQMD), Rule No. 1168.

F. Products shall contain no urea-formaldehyde content.

PART 2 - PRODUCTS

2.1 GENERAL

A. Piping techniques, testing, identification, painting, and operating instructions specified in this section apply to products specified in other sections of Division 23.

B. Equipment that uses or processes date and time data in order to perform its function shall be warranted by the manufacturer to properly function and correctly use or process all time-related data for all dates and times which occur during a reasonable life expectancy of the equipment.

2.2 PIPING MATERIALS

A. Weldolets and thredolets: Fittings designed for installing branches on piping, with either welded or threaded connection to branch; conforming to ASTM A 234.

B. Soldering materials:

1. Solder: Free of lead, antimony, and zinc and meeting the requirements of ASTM B 32. No solder containing lead is permitted.

a. Tin 95.5 percent, copper 4 percent, and silver 0.5 percent; �Silvabrite 100� manufactured by Engelhard Corporation.

b. Tin, copper, bismuth, and silver; "Oatey Silver" manufactured by Oatey.

2. Flux: Meeting the requirements of ASTM B 813 and NSF 61 certified, Oatey H-2095.

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C. Threaded pipe joint materials:

1. Pipe joint compound:

a. Pipe joint compound recommended by the manufacturer for use at the temperature and pressure of the system.

b. For gas service: As specified in Section 23 1123, Natural-Gas Piping.

2. Pipe joint tape: Polytetrafluoroethylene (PTFE) pipe thread tape, "Teflon."

2.3 IDENTIFICATION DEVICES AND MATERIALS

A. Stenciling materials:

1. Stencils: Manufactured standard stencils prepared for required applications, conforming to ASME A 13.1 for color and size of legend letters, including arrows showing direction of flow.

2. Paint: Exterior type enamel, colors conforming to ASME A 13.1, or black.

B. Equipment identification tags:

1. Laminated plastic with adhesive back, white core and black outer layers, which, when engraved, will produce white letters and numerals on a black background.

2. Tags installed on curved surfaces shall be aluminum or brass.

C. Valve tags: Brass, 1.5 inch (40 mm) in diameter with black-filled numbers not less than 0.25 inch (6 mm) high, complete with brass attachment chains.

2.4 RUST INHIBITIVE PAINT

A. Rust-inhibitive paint:

1. Alkyd based, white, black, or bronze tone.

2. Applied in a wet film thickness of at least 2.9 mils (0.07 mm).

3. Benjamin Moore Super Spec HP D.T.M. Alkyd Low Lustre P23.

PART 3 - EXECUTION

3.1 GENERAL

A. Manufacturers' instructions: Except as modified by drawings or specifications, install products and equipment in accordance with manufacturers' instructions and recommendations applicable to the project conditions.

1. Immediately notify Architect if a difference or discrepancy is found between manufacturers' instructions and the drawings or specifications.

B. The contract drawings are diagrammatic and do not indicate all fittings or offsets in pipe and ductwork, all access panels, or all specialties required. Provide required fittings, offsets, access panels, and specialties to coordinate the work.

C. No pipe or duct shall be run below the head of a window or door.

D. Equipment, ducts, and pipes installed in areas without a suspended ceiling shall be as tight to structure as possible, but at least above a height of 6'-8", unless otherwise noted.

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E. Items which require access for operation or maintenance shall be easily accessible. Do not cut or form hand holes for operation or maintenance of appliances through walls or ceilings.

3.2 PIPE INSTALLATION

A. Install pipe exposed to view parallel to building lines and as close to walls, columns, and ceilings as may be practical, maintaining proper clearances for access at all parts requiring servicing.

B. Install pipe a sufficient distance from other work to permit a clearance of not less than 0.5 inch (15 mm) between its finished covering and adjacent work.

C. Remove burrs resulting from cutting pipe or from any other operation.

D. Thoroughly clean pipe and fittings before they are installed, and keep them clean until the acceptance of the completed work. Cap or plug the ends of the lines so as to prevent earth and other debris from entering during construction.

E. Provide for expansion and contraction of piping and connections so that no breakage or excessive strain will occur. Provide anchors and guides of approved design where shown on drawings and where necessary to allow for proper expansion and contraction. At the time of installation, expansion loops shall be cold sprung to one-half of the calculated expansion.

F. Pipe connection flexibility:

1. Connections shall be arranged so that movement in piping due to expansion and contraction will not transmit excessive force to equipment.

G. Install unions or flanges in the piping at each item of equipment, control valve, and appliance, so as to provide easy removal of the equipment, valve, or appliance, and to provide for easy removal of coils.

H. Interface with other products:

1. Where pipe is provided through walls, provide finished, permanent, waterproof installation complete with inserts, sleeves, supports or hangers, seals, and other appurtenances as required. Do not pierce, cut, or notch any footing or other structural member.

2. Waterproofing and dampproofing of the building shall be unharmed by the installation of the work. Where pipe has to pierce waterproofing or dampproofing, including outside walls, the penetration shall be made watertight. Waterproofing damaged or destroyed shall be repaired or replaced with new waterproofing.

I. Thoroughly clean pipe and fittings before they are installed, and keep them clean until the acceptance of the completed work. Cap or plug the ends of the lines so as to prevent earth and other debris from entering during construction.

J. Use welding fittings, tees, wyes, reducers, eccentric reducers, and caps as required. Branches at least two nominal pipe sizes less than the main may be made with "Weldolets" or "Thredolets" installed with full size opening in larger pipe and in accordance with manufacturer's printed instructions. Flanges shall be welded neck or slip-on pattern of class to suit the valves or equipment connections. Flanges shall have machine bolts with hex nuts and washers.

K. Threaded connections:

1. Cut threads full and clean.

2. Apply specified pipe joint compound or tape on male threads only.

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3. Where piping is installed in crawl spaces and tunnels, cover exposed threads with rust-inhibitive paint. Apply after joints have been assembled and tested.

L. Copper tubing installation:

1. Cut pipe with a tubing cutter or fine-tooth saw. Cuts made with a saw shall be true and square, and the end shall be filed smooth with a fine-tooth file. Remove all marks and burrs with sandpaper.

2. Solder joints for copper tubing: Clean ends of tubing and inside of fitting ends thoroughly with emery cloth before applying flux.

3. Provide dielectric fittings between copper and steel piping to prevent electrolysis.

4. Follow the techniques for soldering and brazing pipe, fittings, and valves as recommended by the manufacturer.

3.3 IDENTIFICATION

A. General: Do not apply identification until insulation and finish painting work is complete.

B. Piping:

1. Mark by stenciling.

2. Mark to identify service with arrows showing direction of flow. Apply markings near building walls where pipes enter or leave an accessible space and in intermediate locations so that markings are no more than 30 feet (9 m) apart. They shall be readily visible to a person standing on the floor.

3. Fully identify all piping installed as work of the project.

4. Mark pipe with letters of height and with colors as required by OSHA and conforming to

ASME A 13.1.

5. Identify every thermometer, gauge, and control device.

6. Provide valve tags for all valves except shutoff valves on individual fixtures or equipment where their function is obvious, or where the fixture or equipment is immediately adjacent.

Numbers shall correspond to those shown on the Valve Chart. Attach tags to valve shaft.

C. Piping paint color legend:

SERVICE PIPING STENCIL

Gas OSHA Yellow Black

3.4 CLEANING AND PAINTING

A. Cleaning: Clean all piping and equipment. Where items are to be painted, clean ready for painting.

B. Painting: Coordinate painting with requirements of Division 09. Use paint materials and systems specified in Division 09.

C. Items to be painted:

1. Items furnished with manufacturer�s prime coat.

2. Gas piping.

D. Items not to be painted: Copper, stainless steel, flexible connectors, PVC and aluminum piping jackets, and equipment furnished with manufacturer�s finish.

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E. Paint systems:

1. Galvanized steel: One coat of primer recommended for galvanized surfaces and one coat of glossy alkyd enamel.

2. Ferrous metal: One coat of primer recommended for ferrous metal and one coat of glossy alkyd enamel.

3. Items protected with rust-inhibitive primer: Finish coat of compatible glossy enamel.

F. Paint identification stenciling using colors in accordance with identification legend above.

3.5 PIPING TESTS

A. Hydrostatic testing:

1. Notify Owner in writing at least 24 hours prior to the test.

2. Test before pipes are concealed or insulated.

3. Piping may be tested in sections as the work progresses.

4. Provide fluid, pumps, valves, and gages required for testing.

5. Where water is used as the test fluid, provide ambient temperature water and provide means to avoid freezing. Drain and dispose of test fluid when testing is concluded.

6. Isolate equipment and expansion tanks during test.

7. Isolate or remove any components with a pressure rating below the required test pressure.

8. Brace and support piping during the test, so that no movement, displacement, or damage results from the application of the test pressure.

9. Provide a pressure relief valve, set at a pressure no more than one-third higher than test pressure, to protect against damage caused by expanding liquid or other source of overpressure during test.

10. Replace piping or fittings found defective with new material.

11. Documentation of tests: Prepare a test report for each portion of piping tested, identified by service, material, location, and pipe size. Include these items:

a. Date of test.

b. Starting and completion times.

c. Initial test pressure.

d. Final test pressure.

e. Problems or leaks detected.

f. Corrective actions taken.

g. Record of successful completion of testing.

h. Name, title, and signature of person conducting test.

12. Piping Systems Test Schedule:

System Test

Pressure psig (kPa)

Duration Allowable

Drop Medium

Fuel gas 100 (690) 4 Hours None *Air

* If pressure drops, locate leaks with soap and water solution

Northwest HS Generator & Electrical Equipment Replacement Excavation and Fill for HVAC Work ©2024 James Posey Associates, Inc. 7911-23 23 0501 - 1

SECTION 23 0501

EXCAVATION AND FILL FOR HVAC WORK

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Trenching, backfilling, and compacting for HVAC work underground and outside the building as shown on drawings.

B. Restoring and reseeding grassed areas.

1.2 RELATED SECTIONS

A. Cutting and patching: Division 01 and Section 23 0101.

B. Natural-gas piping: Section 23 1123.

1.3 REFERENCES

A. ASTM D 1557: Laboratory Compaction Characteristics of Soil Using Modified Effort 56,000 ft-lbs/cu ft (2700 kN-m/cu m).

1.4 SUBMITTALS

A. Product data:

1. Warning tape

2. Seed and mulch

B. Certifications: Test reports showing that compaction meets specified requirements.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Backfill: Earth materials, free from perceptible amounts of wood, debris, or topsoil, free of frost at the time of placement, and not containing marl or other elements which tend to stay in a plastic state.

B. Underground warning tape: Polyethylene 0.004 inch (0.102 mm) thick for metallic lines, and for non-metallic lines polyethylene both sides with metallic lining, six inches (152 mm) wide.

1. Colors: In accordance with APWA and AASHTO standards.

2. Markings: Repeated continuously along the entire length, legend appropriate for line being identified.

C. Grass seed: Fresh new-crop seed, 90 percent pure and 85 percent germination. Mix: 70 percent Kentucky Bluegrass, 25 percent Red Fescue and 5 percent Red Top. Only strains of Kentucky Bluegrass found adaptable to Maryland shall be acceptable.

D. Mulch: Free of sticks, weeds, or other foreign matter; either licorice root, tan root, or tan bark;

fibrous by-product of extraction. Use only one type throughout the project.

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2.2 EQUIPMENT

A. Mechanical tampers for compacting backfill: Capable of exerting a blow equal to 250 pounds per square foot (12 kPa) of area of the tamping face.

PART 3 - EXECUTION

3.1 PREPARATION

A. Contact local utility company underground information service (Miss Utility) before beginning excavation outside buildings.

B. Before beginning work, field check the area with the most accurate instruments available, such as Fisher Labs' Pipe and Cable Locators.

3.2 INSTALLATION

A. Perform all excavating, cutting of paved areas, trenching, sheeting, shoring, backfilling, and compacting required for the proper installation of the work.

B. Where obstructions are encountered, obtain written approval and make necessary changes in line, grade or location.

C. Protect existing utilities from damage during excavation and backfilling. Repair damaged new or existing work at no addition to the contract sum. Bracing, shoring and other protection of existing utilities is part of this work.

D. Do not damage or remove existing shrubs or trees including their root systems, without prior notification to the Engineer.

E. Provide temporary roadways over trenches with railings and other safeguards, including amber blinker lamps or other warnings for night use.

F. Note the depths of footings. In cases where piping is in close proximity to or below footings and where the natural earth under footings is disturbed, after the line is installed, the voids shall be filled up to bottoms of such footings with solid concrete.

3.3 CUTTING

A. Cut concrete and asphalt concrete with masonry saw prior to breaking it into smaller pieces for removal.

B. Cut sidewalks perpendicular to the length at the closest existing joint that is a minimum of 24 inches back from either side of the top of the new trench.

3.4 TRENCHING

A. Excavations outside the building shall generally follow the routes indicated on the drawings.

Stockpile topsoil separately for later replacement. Excavations shall be of sufficient depths to provide, unless indicated otherwise on the drawings, a minimum cover as follows:

1. Fuel piping: 30 inches (762 mm).

B. Trenches shall be of necessary depth and width for the proper laying of pipe with a minimum of 8 inches (205 mm) on each side of the joint.

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1. The sides shall be as nearly vertical as practicable. Unless local regulations are more strict, trenches 4 ft. (1220 mm) and deeper shall have shored sides as required by OSHA trenching regulations.

2. The bottoms of trenches shall be accurately graded to provide uniform bearing and support for each section of pipe on undisturbed soil at every point along its entire length, except for bell holes and for the proper sealing of the pipe joints.

3. No greater length of trench shall be left open, in advance of the completed structure placed in it, than can be completed in that day's operation.

4. Except where rock is encountered, do not excavate below the depths required. Where rock excavation is required, excavate to a depth of at least 6 inches (150 mm) below the trench depth and fill the overdepth with compacted crusher run or bank run stone or sand.

Unauthorized overdepths in excavation shall be backfilled with crushed stone, slag or gravel, thoroughly compacted.

5. Whenever wet or otherwise unstable soil is encountered, it shall be removed to the depth and extent directed, and the trench backfilled to the proper grade with crushed stone, slag or gravel.

C. Should springs be encountered within the work area, or soft soil conditions at the elevations required for load bearing, immediately notify the Engineer and do not place any portion of the work on such surfaces until instructions are received.

D. Furnish and maintain pumps, flumes, gutters, and appurtenances if required to keep the excavations free from water. Water shall be directed to a point remote from building operations, shown on the approved shop drawing.

3.5 BACKFILL

A. Place no backfill until the adjacent construction or the utility to be covered has been inspected, tested, and approved.

B. Installing underground warning tape: Install in backfill above exterior buried lines not encased in concrete. Select legend and color appropriate for type of line. Install metallic lined tape for non-metallic lines. Install approximately 12 inches (305 mm) below grade.

C. HVAC systems backfill:

1. Backfill and compact in six-inch (150-mm) layers up to spring line of the pipe. The installations shall then be inspected and tested.

2. Following inspection, backfill in six-inch (150-mm) layers, each compacted, until the pipe has a cover of not less than one foot (305 mm). Place the remainder of the backfill material in the trench in eight-inch (200-mm) compacted layers.

3. Excavations improperly backfilled shall be reopened, then refilled and compacted to the required grade and compaction, and smoothed off.

4. Open trenches across roadways or other areas to be paved shall be backfilled as specified above, except that the entire depth of trench shall be backfilled in six-inch (150-mm) layers, and each layer shall be mechanically compacted.

5. Completed work shall have uniform graded surface, in accordance with the surface and grade indicated on the drawings.

D. Structure backfill:

1. Do not backfill against structures with cement mortar joints until the mortar is at least twelve hours old.

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3.6 COMPACTION

A. Test in accordance with the requirements of ASTM D 1557.

B. Compact under slabs, roads, and sidewalks to a 95 percent density.

C. Compact unpaved areas to a 90 percent density.

D. Backfill and compact trench in unpaved areas to within 4 inches (102 mm) of existing grade.

Furnish and install compacted select topsoil for the final layer to finish even with existing grade.

Remove surplus earth and rake unpaved areas for final planting.

E. Take particular care in compaction of earth under joints of HVAC piping.

3.7 SEEDING

A. Seed disturbed grass areas at the rate of 5 pounds (2.27 kg) per 1000 sq. ft. (92.9 sq. m), with the seed mix specified.

B. Uniformly distribute seed with an approved machine to ensure a covering of plus or minus 1/4 inch (6 mm). Sow half of the seed in one direction and the rest at right angles.

C. Do not seed during windy weather or when ground is wet or otherwise untillable. Seed between the dates of March 1st to May 1st or August 15 to October 15 unless otherwise approved in writing.

3.8 MULCHING

A. Mulch seeded areas immediately following seeding with…