DIVISION 15-MECHANICAL PN SECTION BASIC MECHANICAL MATERIALS AND METHODS PART 1 - GENERAL 1.01 APPLICATION OF THIS SECTION

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1 PART 1 - GENERAL 1.01 APPLICATION OF THIS SECTION A. This Section applies to all other Sections in Division 15, as the work is applicable SECTION INCLUDES A. Drawing intent. B. Arrangement of work. C. Coordination. D. Pipe, valves and accessories. E. Pipe installation procedures. F. Field painting. G. Electrical equipment and wiring. H. Pipe sleeves, seals and escutcheons RELATED SECTIONS A. Section Earthwork for Mechanical Construction. B. Division 7 - Joint Sealer around Penetrations through Non-Fire Rated Construction. C. Section Sleeves for Ductwork DRAWING INTENT A. Drawings are diagrammatic and indicate general arrangements, approximate sizes and relative locations of principal equipment and materials. Provide offsets as required for coordinated installation. Provide minor equipment, details, materials and methods not shown but standard, referenced and specified, to complete the work ARRANGEMENT OF WORK

2 A. Conceal mechanical construction running through finished spaces within walls or chases. At suspended ceilings, conceal Work above ceiling unless indicated otherwise. B. In finished spaces with or without ceilings, coordinate with other trades so as to be in conformance with reflected ceiling plans. C. In finished spaces without ceilings, run piping and ductwork parallel with building lines. D. Where physical interferences cannot be resolved readily, prepare composite drawings at a scale of not less than 1/4 inch = 1'-O", clearly showing Work of this Division in relation to Work of other trades. Obtain written approval by A/E of proposed changes. Distribute drawings to other trades affected. Correct conflicts at no additional cost. E. Subject to approval by A/E and without extra cost, make modifications in layout as required to prevent conflict with other trades for proper execution of the Work. F. Do not install piping, ducts or equipment foreign to electrical equipment in electrical rooms and closets. Do no install piping and ducts over, around, in front of, in back of or below electrical controls, panels, switches, terminals, boxes or similar electrical equipment in any area of building. Drip pans are not permitted under any circumstances around electrical equipment. G. Position mechanical work for easy unobstructed operation of the building. H. Check equipment layouts with shop drawings of other trades to determine roughing-in requirements. Do not scale drawings for exact locations. Produce a neat arrangement of work, and to overcome local interferences to best advantage of the project. I. Do not install aluminum or copper products where they will be encased in concrete COORDINATION A. Earthwork: Coordinate with Section regarding routing, pipe bedding materials and other related activities. B. In general, arrange work so access doors will not be required. Where devices requiring access must be concealed in finished Construction, coordinate with other Trades and provide schedule showing size and location of each door

3 C. Prepare dimensioned drawings showing size and location of equipment foundations and pads. PART 2 - PRODUCTS 2.01 PIPE, VALVES AND ACCESSORIES A. Restrictions: 1. Do not use gaskets or packings containing asbestos. 2. Do not use fittings or flanges manufactured in Asia. 3. When two or more valves of the same type are used in the same service, furnish all valves of this type from the same manufacturer. B. Manufacturers General: 1. Except as restricted above, and where pipe system products are specified by reference standard only, any manufacturers product conforming to the specified standard may be used. 2. For pipe system products where manufacturers' systems and model numbers are specified, comparable systems and products by the following manufacturers may be used. Provide figure number comparison chart for specified and substituted valves FIELD PAINTING MATERIALS A. Follow Division 9 as applicable ELECTRICAL EQUIPMENT AND WIRING A. Wiring and Conduit: 1. Follow Division Unless otherwise specified, power wiring from the power source to motor starting equipment (including variable frequency drive packages) and from that equipment to motors including final connections is specified under Sections and Classify line (120 volt) and low (below 120 volt) voltage wiring from control panels to control(ed) devices as control wiring. 4. Factory install power wiring from control(ed) devices, motors and equipment to factory mounted starting equipment specified under this Division. Wherever possible, factory install control wiring PIPE SLEEVES - ABOVE GRADE

4 A. Wall Sleeves: Steel pipe or 18 gauge galvanized steel; full dimension of wall. B. Floor and Roof Sleeves: Steel pipe with welded-on collar to position top of sleeve 2 inches above floor slab, and 8 inches above roof deck, make bottom of sleeve flush with underside of roof or floor deck. C. Size (ID): 1/2 inch to 3/4 inch larger than penetrating element, including pipe insulation where specified in Section PIPE SLEEVE/SEAL ASSEMBLY - BELOW GRADE FOUNDATION WALLS AND FLOORS A. Manufacturers: 1. Thunderline Link Seal. 2. O.Z./Gedney. 3. Substitutions: None permitted. B. Description: Mechanical type, multiple interlocking synthetic rubber expandable links. Include seal manufacturer's metal sleeve for matching assembly. C. Size (ID): As recommended by manufacturer to accommodate penetrating element ESCUTCHEONS A. One piece, set screw type, chrome plated steel and cast brass. See Part 3 for locations EXCAVATION AND BACKFILL A. All excavation is unclassified. The Contractor shall inspect the site and make allowance in his bid for soil to be excavated since no compensation will be given where rock is encountered. B. The Contractor, unless otherwise noted on the drawings, shall do all excavations for trenches, foundations, and pits of whatever kind necessary for the installation of this work. Bottom of trenches shall have the proper uniform grade wherever possible, unless otherwise directed. C. Trenches are to be excavated to the widths, lines and grades indicated on the drawings and/or specified in the appropriate sections of these specifications. Trenches for piping are to be excavated to a minimum width of one (1) foot plus the outside diameter of the pipe. The trench shall be excavated in a manner such that the pipe will be located in the

5 center of the trench with the trench bottom having the proper uniform grade in the direction of flow. Trenches shall be deep enough to provide a minimum of four (4) feet fill over the piping except as may be otherwise indicated on the drawings. D. In earth excavation, trenches shall be carried to invert of pipe. If rock is encountered, carry trench to a point six inches below pipe invert. No pipe shall be bedded directly upon rock but shall be cushioned by a six inch layer of selected crushed stone or grave. E. The Contractor shall do any shoring, bracing, etc., necessary to maintain the banks of his excavation, shall make good any damage done to property of adjoining premises or work of other contractors due to his failure to properly shore his excavation. The Contractor shall do all pumping required to keep his excavations free of water including rental of pumps, temporary power and labor. F. All excavations shall be left open until work has been inspected and approved by the Owner's Representative. Sufficient time shall be allowed after notice is given that work is ready for inspection for making all examinations and tests. Under no circumstances shall excavated material be left, even temporarily, where it will interfere with the building or other Contractor's operations. G. Excavations which pass under or within eighteen (18) inches of columns or wall foundations shall backfilled up to the level of the columns or wall foundations with concrete mixed in proportions to one part cement, three parts sand and five parts coarse aggregate. Excavations shall not undermine foundations at a slope of 1:1 or greater. H. All earth backfilling shall be made in layers not to exceed six (6) inches and each layer shall be thoroughly tamped into place before the next layer is placed. Backfilling shall be clean earth, free stone, pieces of concrete, rubbish, and other foreign materials. Material frozen in limps or material softer than the adjoining soil shall not be used in backfilling. The Contractor shall distribute on the premises as directed, all earth remaining after the backfilling. I. Any rock encountered shall be removed without blasting. J. The Contractor will do all patching of bituminous surfaces, concrete walks, driveways, streets, etc., necessary to complete his work. All patching shall match the existing surfaces. Patching shall be done by personnel skilled in their trades

6 K. Provide adequate temporary crossovers for pedestrian and vehicular traffic including guard rails, lamps, flags, as directed; remove same when necessity for such protection ceases. PART 3 - EXECUTION 3.01 PIPE INSTALLATION PROCEDURES A. Clean piping materials before installation to remove grease, loose dirt, mill scale and other foreign matter. B. Unless shown otherwise, route piping in the most direct manner, parallel to building lines. C. Close open ends of piping and equipment when it is not actually being worked on, with flange cover, cap or plug to prevent entry of foreign material during construction. D. Accurately align, support and connect piping without forcing. E. Make allowances for expansion and contraction in piping systems to avoid strain to joints, hangers or equipment. F. Group piping wherever practical at common elevations. G. Space piping to maintain at least 2 inch clearance from any other object, including movement due to temperature changes. When piping is insulated, maintain 2 inch clearance between insulation and adjacent insulated piping, walls or other objects. H. Install piping free of traps and with sufficient slope so that systems may be drained to one or several points. In event that it is impossible to drain to a common point due to structural obstructions and finished ceiling heights, provide additional drain valves required to completely drain piping systems. Verify location of drain valve, with A/E before installation. I. Provide accessible flanges and union connections on supply and return connections of equipment, valves and other items which must be disconnected or removed for maintenance. Where unions are furnished as an integral part of equipment, additional unions are not required. J. Do not use all-thread (close) nipples, swaged nipples, or bushing reducers. K. Provide access to valves when not exposed

7 L. Provide piping support system in accordance with Section M. Where pipe support members are welded to structural building framing exposed to the atmosphere, scrape, brush clean, and apply one coat of zinc rich primer to finished welds JOINTS AND CONNECTIONS A. Threaded Connections: 1. Ream pipe end, to remove burrs. 2. Use only standard taper threads, ANSI B2.1. Make threads full, sharp, clean, and free of fins and burrs. 3. Use Teflon joint sealing tape. Apply to male threads only. Conceal threads on chrome plated pipe. 4. Do not use close or short nipples of a size where the length of unthreaded pipe is less than the width of a pipe wrench. 5. Thredolets, T-Drill (Plumbing Piping System, Only) or similar code approved fittings may he used for branch connections. 6. Slip joints are permitted only in Sanitary Drainage systems on fixture side of traps. 7. Threaded flanges shall be factory machined per ANSI B16.5 in pressure rating conforming to piping system. B. Welded Carbon Steel Connections: 1. Comply with ANSI/ASME B31.1, and where applicable, ANSI/ASME B 31.9 and ANSI/ASME Boiler and Pressure Vessel Code. Welding and Brazing Qualifications: Keep records and certifications required by code on file and available for inspection. 2. Where required, perform welding using welders certified in accordance with AWS, following specified reference standards. 3. Make welding connections using shielded metal or submerged Electric Arc Welding Method. 4. Provide single-vee type butt welds, unless specified otherwise, in accordance with ANSI B16.9 and ANSI B Mitered elbows are not permitted. Use only long radius elbows. 6. Welded branch connections may be used in place of welding tees, provided ANSI Code for Pressure Piping, B31 is met

8 7. Weldolets, thredolets or similar code approved fittings may be used for branch connections instead of reducing tees where nominal diameter of takeoff is (1/3) one third smaller than main diameter. 8. Do not use laterals and other joints requiring reinforcement to restore strength of joint to full strength of pipe. 9. Whenever welding close to walls, floors or building structure, protect adjacent surfaces with fireproof cloth. Thoroughly clean surfaces of weld splatter. Follow applicable NFPA standards. C. Copper Tubing Connections: 1. For solder or braze connections, do not use compression type fittings. 2. Make connections in accordance with procedure in current edition of the Copper Tube Handbook of the Copper Development Association. 3. Make soldered joints with Sb5 solder, and brazed joints with silver brazing wire. D. Threaded and Bonded Bell and Spigot Connections: 1. Make tapered end field joints using tapering tool furnished by manufacturer. 2. Assemble piping system without adhesive, to verify measurements prior to bonding. 3. Construct (bond) joints in accordance with manufacturer's recommendations using joint wrenches furnished by manufacturer. Below 70 degrees F, use "heat assist methods" to shorten cure time. 4. Maintain minimum acceptable burial depths as required by authority having jurisdiction. E. Connections of Dissimilar Metallic Materials: 3.03 FIELD PAINTING 1. Isolate connections between dissimilar metallic materials where galvanic or electrolytic action may occur. Use dielectric fittings that provide a complete isolation of each end, using materials suitable for design pressure, temperature and fluid contained. 2. Isolate non-ferrous piping passing through openings in structural steel with non-conductive material permanently attached to the pipe. A. Except as specified below, field painting required for mechanical construction is specified under Division

9 B. Furnish ferrous materials with a factory-applied prime coat unless other means of protection from rust are provided. Where materials are not factory primed, field prime prior to installation. C. Repair damaged factory applied finished surfaces to match original surface. Completely refinish surfaces if repairs are not acceptable ELECTRICAL EQUIPMENT AND WIRING A. Install the work in accordance with applicable provisions of Division 16. B. Unless otherwise specified, install wire in conduit PIPE SLEEVES, SEALS AND ESCUTCHEONS A. Sleeves: Furnish sleeves to other Sections as appropriate for installation. Sleeves in concrete shall be spaced a minimum of 4 inches apart. B. Seals: install mechanical seals around pipe passing through foundation walls, in such manner to ensure watertight installation. C. Escutcheons: Install plates tight to wall or ceiling as follows: 1. Finished Spaces: chrome plated. 2. Unfinished Spaces: Cast brass. 3. Concealed Spaces: None required. PART 4 - MEASUREMENT AND PAYMENT 4.01 All costs for all work indicated in this specification section will be included in the Contractor's lump sum amount, unless indicated otherwise. END OF SECTION