B.08.03 35 20 16.01 23Amendment 0003.pdf

FEDERAL MRLS L-500 LEVEE UNIT W912DQ20B1034

DONIPHAN COUNTY, KANSAS

SECTION TABLE OF CONTENTS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 20 16.01 23

SLIDE GATES - MISCELLANEOUS DRAINAGE STRUCTURES

04/07

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY CONTROL

1.3.1 General

1.3.2 Certification of Materials, Procedures, and Qualifications

1.3.3 Workmanship

1.3.3.1 General

1.3.3.2 Commercial Equipment

1.3.3.3 Reporting

1.3.4 Design Requirements

1.3.4.1 General

1.3.4.2 Slide Gate

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Cast Iron Slide Gate Materials

2.1.2 Stainless Steel Slide Gate Materials

2.1.3 Lists of Materials

2.1.4 Shop Drawings

PART 3 EXECUTION

3.1 DESIGN OF CAST IRON SLIDE GATES

3.1.1 General

3.1.2 Frame

3.1.3 Slide

3.1.4 Wall Thimble

3.1.5 Discs

3.1.6 Guides, Wedges, and Seals

3.1.7 Stems

3.1.7.1 Stem, Couplings, and Stem Guides

3.1.7.2 Stem Cover

3.1.8 Gate Operator

3.1.9 Painting

3.2 DESIGN OF STAINLESS-STEEL SLIDE GATES

3.2.1 General

3.2.2 Frame

3.2.3 Slide

3.2.4 Wall Thimble

3.2.5 Discs

3.2.6 Guides, Wedges, and Seals

3.2.7 Stems

3.2.7.1 Stem, Couplings, and Stem Guides

3.2.7.2 Stem Cover

3.2.8 Gate Operator

35 20 16.01 23 - 1

3.2.9 Painting

3.2.10 Stainless Steel Weld Inspection

3.3 STORAGE

3.4 ERECTING ENGINEER

3.5 FIELD INSTALLATION AND TESTS

3.5.1 Installation

3.5.1.1 General

3.5.1.2 Wall Thimble

3.5.1.3 Gate Installation

3.5.2 Tests

3.6 GUARANTEE

-- End of Section Table of Contents --

35 20 16.01 23 - 2

SECTION 35 20 16.01 23

SLIDE GATES - MISCELLANEOUS DRAINAGE STRUCTURES

04/07

PART 1 GENERAL

The work covered by this section consists of furnishing all plant, labor, material and equipment required to furnish, fabricate, and install new slide gates, complete, as specified herein and as shown on the Contract Drawings.

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B36.10M (2015; Errata 2016) Welded and Seamless Wrought Steel Pipe

AMERICAN WELDING SOCIETY (AWS)

AWS D1.6/D1.6M (2017) Structural Welding Code - Stainless Steel

ASTM INTERNATIONAL (ASTM)

ASTM A126 (2004; R 2019) Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings

ASTM A240/A240M (2018) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A276/A276M (2017) Standard Specification for Stainless Steel Bars and Shapes

ASTM A582/A582M (2012; R 2017) Standard Specification for Free-Machining Stainless Steel Bars

ASTM B98/B98M (2013) Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes

ASTM B584 (2014) Standard Specification for Copper Alloy Sand Castings for General Applications

ASTM D2000 (2018) Standard Classification System for Rubber Products in Automotive Applications

ASTM D4020 (2011) Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion

35 20 16.01 23 - 3

Materials

ASTM F593 (2017) Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C560-14 AWWA Standard For Cast Iron Slide Gates

AWWA C561-14 AWWA Standard for Fabricated Stainless-Steel Slide Gates

1.2 SUBMITTALS

Approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only or as otherwise designated. When used, a designation following the "G" designation identifies the office that will review the submittal. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Lists of Materials; G, DO

Design Requirements, G, DO

The Contractor shall submit the manufacturer's design calculations clearly defining all requirements specified herein and shown on the contract drawings.

SD-02 Shop Drawings

Shop Drawings; G, DO.

SD-06 Test Reports

Quality Control; G, RO

Tests

Weld Inspection Reports

SD-07 Certificates

Materials, Procedures, and Qualifications; G, DO.

SD-08 Manufacturer's Instructions

Installation; G, DO

The contractor shall submit for approval, intriplicate, manufacturer's installation instructions.

1.3 QUALITY CONTROL

1.3.1 General

The Contractor shall establish and maintain quality control for the work

35 20 16.01 23 - 4 specified in this section to assure compliance with the contract requirements and shall maintain detailed records of his quality control for construction operations, including but not limited to, the following:

(a) Material;

(b) Fabrication and workmanship;

(c) Welding; and

(d) Installation

1.3.2 Certification of Materials, Procedures, and Qualifications

The Contractor shall certify that all materials, either specifically manufactured for this work or manufactured as a stock item, conform to the requirements of these Specifications. Such certification will not relieve the Contractor of responsibility for any fault in operation, workmanship or material that may develop before the completion of his work or guarantee.

The Contractor shall furnish the certified results, in triplicate, of any required test or analyses.

Also the Contractor shall submit for approval, in triplicate, certification of material tests and analyses, examinations, welding procedures and welding operator qualifications. Test reports for material tests and analyses shall be identified with specific lots and items prior to installation.

1.3.3 Workmanship

1.3.3.1 General

Workmanship shall be of the highest grade in accordance with the best modern practices to conform to the Specifications for the item of work being furnished.

1.3.3.2 Commercial Equipment

Commercial equipment furnished under this contract, but not designed specifically for this particular project, shall be the standard product of a manufacturer regularly engaged in the manufacture of equipment of this type; of current manufacture; new and unused; built on the multiple or repetitive system; and suitable for the intended use. The provisions of this section shall not apply to the manufacture of the items themselves, except as specifically directed by the COR.

1.3.3.3 Reporting

Three copies of these records and tests, as well as records of corrective action taken, shall be furnished to the COR daily when work under this Section is being performed.

1.3.4 Design Requirements

1.3.4.1 General

The manufacturer shall provide design calculations clearly defining all requirements specified herein and shown on the contract drawings. Design calculations shall be signed and sealed by a licensed professional engineer. It is the responsibility of the Contractor to obtain the support of a manufacturer regularly engaged in the manufacturer of slide gates for the type of service required under this contract work. All gates shall be

35 20 16.01 23 - 5 of the same manufacture and shall be designed, fabricated and assembled in accordance with standard sizes and gages. All components shall be adequate to withstand, without breakage or deleterious deformation, all stresses encountered during installation or operation under the conditions specified. All components shall be manufactured under the principles of interchangeability. The size of the gate provided shall correspond to and provide closure for the pipe size indicated on the drawings.

1.3.4.2 Slide Gate

Each slide gate shall be of the upward opening and rising stem type, and be manually operated. Gates shall be either cast iron or stainless steel.

Design of cast iron slide gates shall be in conformance with AWWA C560-14 Design of stainless-steel slide gates shall be in conformance with

AWWA C561-14.

All new slide gates, associated hoists and stems designed and furnished for this work shall be capable of resisting the design seating and design unseating heads given below. The design heads and operating heads are equal and are measured from the horizontal center line of the gate opening to the water surface elevation.

Thimble Seating Unseating Type Head(ft) Head(ft)

Type F 25 5

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Cast Iron Slide Gate Materials

The slide gate frame and disc, stem guides, wall thimbles, pedestals, housings, yokes and retainer bars shall be cast iron conforming to ASTM A126, Class B or ASTM A48, Class 30.

Gears shall be steel meeting the requirements of AISI 8620, AISI 4140, or

AISI 1117.

The lifting device shall be manually crank-operated and compatible with a tripod-type portable operator as recommended by the manufacturer to be compatible with gate design. A position indicator shall be provided to show the position of the gate at all times. The indicator shall be attached to the lift mechanism. The lifting device must be compatible with the owner's existing operator.

The wedges, lifting nut, stem block and stem guide bushings shall be bronze meeting requirements of ASTM B584.

The stem, stem key, wall thimble studs, gate assembly, stop plate and retainer, and the lift assembly stop collar shall be stainless steel meeting the requirements of ASTM A276/A276M, Type 304.

The gate assembly seating faces and the lift assembly stop nut shall be manganese bronze meeting the requirements of ASTM B98/B98M, Alloy 865.

35 20 16.01 23 - 6

Fasteners, including anchor bolts, and nuts shall be stainless steel meeting the requirements of ASTM F593, Type 304.

Seals shall be natural or synthetic rubber conforming to ASTM D2000.

The stem splice shall be stainless steel meeting the requirements of ASTM A582/A582M, Type 303.

Resilient seals for flush bottom gates shall be extruded or molded natural or synthetic rubber. Reclaimed rubber shall not be used.

Each rising stem unit shall be provided with galvanized Schedule 40 steel pipe stem cover and cap.(ASME B36.10M).

2.1.2 Stainless Steel Slide Gate Materials

The slide gate frame and disc, wall thimbles, and yokes shall be stainless steel conforming to ASTM A240/A240M, Type 304 or 316.

Pedestals, wall brackets, retainer bars and stem guide brackets shall be cast iron conforming to ASTM A126, Class B or stainless steel conforming to ASTM A276/A276M Type 304 or 316.

Gears shall be steel meeting the requirements of AISI 8620, AISI 4140, or

AISI 1117.

The lifting device shall be manually crank-operated and compatible with a tripod-type portable operator as recommended by the manufacturer to be compatible with the gate design. A position indicator shall be provided to show the position of the gate at all times. The indicator shall be attached to the lift mechanism. The lifting device must be compatible with the owner's existing operator.

The lifting nut, stem block and stem guide bushings shall be bronze meeting requirements of ASTM B584.

The stem, stem key, wall thimble studs, gate assembly, wedges, stop plate and retainer, and the lift assembly stop collar shall be stainless steel meeting the requirements of ASTM A276/A276M, Type 304 or 316.

Fasteners, including anchor bolts, and nuts shall be stainless steel meeting the requirements of ASTM F593, Type 304.

Invert seals shall be Neoprene or EPDM conforming to ASTM D2000. Side seals or seats shall be Ultra High Molecular Weight (UHMW) Polymer conforming to

ASTM D4020.

The stem splice shall be stainless steel meeting the requirements of ASTM A582/A582M, Type 303.

Resilient seals for flush bottom gates shall be extruded or molded natural or synthetic rubber. Reclaimed rubber shall not be used.

Each rising stem unit shall be provided with galvanized Schedule 40 steel pipe stem cover and cap. (ASME B36.10M)

2.1.3 Lists of Materials

The Contractor shall submit three copies of all purchase and mill orders, 35 20 16.01 23 - 7 shop orders and work orders. The Contractor shall submit a list designating the material to be used for each item at the time of submittal of the shop drawings. Where mill tests are required, purchase orders shall contain the test site address and the name of the testing agency. The Contractor shall also submit a shipping bill or memorandum of each shipment of finished pieces or members to the project site giving the designation mark and weight of each piece, the number of pieces, the total weight, and the car initial and number.

2.1.4 Shop Drawings

The Contractor shall submit complete shop drawings and erection drawings for the slide gates, for appurtenant items, and for the gate anchorage systems for approval prior to fabricating any gate. Drawings shall include catalog cuts, templates, fabrication, erection and assembly details, and grade and class of materials. Elements of fabricated items inadvertently omitted from contract drawings shall be indicated on submittals. The paint specifications and the manufacturer's written instructions shall be submitted with the shop drawings.

PART 3 EXECUTION

3.1 DESIGN OF CAST IRON SLIDE GATES

3.1.1 General

Cast iron slide gate, complete with all components, shall be designed, manufactured and supplied by one manufacturer.

3.1.2 Frame

The frame shall be cast iron, of ample section, and cast in one piece to fit the openings shown on the contract drawings. Contact surfaces shall be machined, with the back flange machined to bolt directly to a wall thimble.

3.1.3 Slide

The gate slide shall be cast iron and shall be ribbed to withstand the designated water head stated in Section 1.3.5.2 and requirements of AWWA C560-14. A thrust nut pocket shall be provided above the horizontal centerline of the slide. The thrust nut pocket shall be reinforced by ribs and drained.

3.1.4 Wall Thimble

The wall thimble shall be cast iron and shall be of the configuration as required to provide a rigid mounting. All thimbles shall be one-piece construction. The front thimble flange shall be machined with tapped holes for the gate frame attaching studs. A mastic supplied by the manufacturer shall be applied to provide a seal between the flange of the slide gate and the wall thimble. Wall thimbles shall have invert holes to permit satisfactory concrete placement beneath the thimbles.

The vertical centerline shall be marked on the thimble during fabrication to identify the thimble top for correct placement.

35 20 16.01 23 - 8

3.1.5 Discs

The disc shall be one piece cast iron with vertical and horizontal ribs, and with an integrally cast, heavily reinforced stem thrust nut pocket on the vertical centerline and above the horizontal centerline.

3.1.6 Guides, Wedges, and Seals

Guides shall be one-piece cast iron and meet the requirements of AWWA C560-14. The guide shall be long enough to retain and support at least one-half of the gate disc in the fully open position. The guide shall also be designed to withstand the total thrust due to water pressure and wedging action.

Gates shall be equipped with side wedges to provide contact between the slide and frame facings when the gate is in closed position. The top and bottom wedges shall be supplied, if required, as determined by the manufacturer.

The resilient seal for flush bottom gates shall be mounted on invert frame. Resilient seals mounted on the disk will not be permitted.

3.1.7 Stems

3.1.7.1 Stem, Couplings, and Stem Guides

The stem shall be of sufficient diameter to withstand, without buckling or permanent distortion, stresses induced by closing the gate. The design shall be meet the requirements of AWWA C560-14. The diameter of the stem shall be as designed by the manufacturer.

Stem threads shall be either machine-cut or rolled and of the ACME type.

The stem and nut threads shall have sufficient contact area so that the contract pressure will not exceed 5000 psi when the maximum stem thrust is exerted. The stem thread surfaces in contact with the lift nut shall have not rougher than a 7 micro-inch finish. The exterior corners of the threads, either during or after machining, shall be given a slight radius of approximately .015 inch in order to prevent them from acting as cutting edges as the stem passes through the lift nut.

The stem shall be of stainless steel sections joined with couplings which are threaded and keyed. All threaded and keyed couplings of the same size shall be interchangeable.

The stem shall be fitted with a tapped hole in the top end for handling.

The tapped hole shall be of sufficient diameter and depth for the insertion of an eyebolt of sufficient strength to pick up the entire stem from a horizontal position.

The stem shall be provided at its lower end with a bronze thrust nut which will fit into the pocket provided on the slide and which will positively prevent rotation of the stem. The stem shall be provided at its upper end with a bronze adjustable stop collar just above the hoist lift nut, and shall be provided with a similar stop collar below the hoist.

Stem guides shall be of cast-iron, bronze bushed and mounted on cast-iron brackets. They shall be drilled and slotted so as to be adjustable in two directions and shall be spaced at close enough intervals to support the stem adequately with an L/R ratio of not more than 200 and spaced in

35 20 16.01 23 - 9 accordance with the manufacturer's recommendation for the stem size. After installation of the cover, exposed threads shall be cleaned and degreased.

3.1.7.2 Stem Cover

A stem cover shall be provided. The stem cover shall be of galvanized Schedule 40 steel pipe of sufficient diameter and length to permit full travel of the stem without obstruction or binding. The top of the cover shall be closed with a galvanized steel pipe cap. The pipe cap shall have a drilled and tapped hole fitted with an eyebolt of sufficient strength for lifting the assembly from a horizontal position. The stem cover shall have a grease fitting, which can be used for lubricating the stem, installed above the threads into the top of hoist to prevent rainwater entry. The stem cover shall have vent holes to prevent condensation.

Prior to assembly, treaded portions of the stem cover, cap, and eyebolt shall be coated with pipe compound. After installation, all exposed threads shall be cleaned and coated with the same paint used for the gate following the manufacturer's written instructions.

3.1.8 Gate Operator

Provide new portable operators that permit closure within 30 minutes or less.

The manual lifting device shall be crank-operated with either a single or double gear type meeting the requirements of AWWA C560-14

Gears shall be accurately machined with teeth cut to provide smooth, proper operation.

The crank shall be removable and fitted with a corrosion resistant rotating handle which can be removed and stored in a location which will be determined by the COR.

The gate operator shall have a nut aligned horizontally to accept connection by portable operators.

A position indicator shall be provided to show full open and closed positions divided by a minimum of 1/8 indicator marks. The indicator shall be attached to the lift mechanism.

3.1.9 Painting

Paint all cast iron components with a high solids epoxy coating recommended by the gate manufacturer. Painting must be the responsibility of the gate manufacturer and according to the paint manufacturer's written instructions unless otherwise approved by the Government. Submit the paint specification and instructions with the gate shop drawings.

3.2 DESIGN OF STAINLESS-STEEL SLIDE GATES

3.2.1 General

The stainless-steel slide gate, complete with all components, shall be designed, manufactured and supplied by one manufacturer. Minimum material thickness shall be 1/4 inch.

35 20 16.01 23 - 10

3.2.2 Frame

The frame shall be stainless steel, of integral unit of brake form and structural shapes, rigidly assembled to fit the opening shown on the contract drawings. Holes shall be provided for mounting on anchor bolts.

Seats and seals shall be secured to the frame in a manner to ensure they will remain in place, free from distortion or loosening during the life of the gates. Seat contact pressure shall not exceed 600 psi at the design head.

3.2.3 Slide

The slide shall be stainless steel. Deflection under full head shall be limited to 1/720 of the span. The stem connector clips or stem block pocket shall be welded to the slide. Provide adjustable top wedges in order to prevent deflection in the slide resulting from over closure.

3.2.4 Wall Thimble

The wall thimble shall be stainless steel and shall be of the configuration as required to provide a rigid mounting. The cross section of the thimble shall be of a shape to inhibit pullout and water seepage. The front or mounting flange shall be accurately formed to provide a suitable mounting surface and shall be provided with mounting fasteners that mate the gate frame hole pattern.

3.2.5 Discs

The disc shall be stainless steel with vertical and horizontal ribs and shall not deflect more than 1/720 of the span or 1/16 inch at the seated sealing surface of the gate under full head.

3.2.6 Guides, Wedges, and Seals

Guides shall be stainless steel and meet the requirements of AWWA C561-14.

The guides shall support at least one-half of the slide height when the slide is in the fully open position. The guide shall also be designed to withstand the total thrust due to water pressure and wedging action.

Slide gates shall incorporate a flush-bottom seal that is mechanically fastened to the bottom frame invert member. Press fit seals are not acceptable.

Side seals shall be securely fastened to the frame with formed stainless steel retainers and shall be replaceable and adjustable without removing the gate from the installed position.

3.2.7 Stems

3.2.7.1 Stem, Couplings, and Stem Guides

The stem shall be of sufficient diameter to withstand, without buckling or permanent distortion, stresses induced by closing the gate. The design shall meet the requirements of AWWA C561-14. The diameter of the stem shall be as designed by the manufacturer.

Stem threads shall be either machine-cut or rolled and of the ACME type and designed in accordance with AWWA C561-14.

35 20 16.01 23 - 11

The stem shall be of stainless steel sections joined with couplings which are threaded and keyed. All threaded and keyed couplings of the same size shall be interchangeable.

The stem shall be fitted with a tapped hole in the top end for handling.

The tapped hole shall be of sufficient diameter and depth for the insertion of an eyebolt of sufficient strength to pick up the entire stem from a horizontal position.

Stem guides will be split collar bronze type, mounted on cast iron brackets to allow for installation after the stem is placed. Stem guides will be adjustable in two directions and will be spaced at sufficient intervals to adequately support the stem. The inside diameter of the guide shall be 1/8 inch to 1/4 inch larger than the outside diameter of the stem. Stem guide spacing will not exceed an L/r ratio of 200. After installation of the cover, exposed threads shall be cleaned and degreased.

3.2.7.2 Stem Cover

The stem cover shall be of galvanized Schedule 40 steel pipe of sufficient diameter and length to permit full travel of the stem without obstruction or binding. The top of the cover shall be closed with a galvanized steel pipe cap. The pipe cap shall have a drilled and tapped hole fitted with an eyebolt of sufficient strength for lifting the assembly from a horizontal position. The stem cover shall have a grease fitting, which can be used for lubricating the stem, installed above the threads into the top of hoist to prevent rainwater entry. The stem cover shall have vent holes to prevent condensation.

Prior to assembly, threaded portions of the stem cover, cap and eyebolt shall be coated with pipe compound. After installation, all exposed threads shall be cleaned and coated with the same paint used for the steel accessories following the manufacturer's written instructions.

3.2.8 Gate Operator

Provide new portable operators that permit closure within 30 minutes or less.

The manual lifting device shall be crank-operated with either a single or double gear type meeting the requirements of AWWA C561-14.

Gears shall be accurately machined with teeth cut to provide smooth, proper operation.

The crank shall be removable and fitted with a corrosion resistant rotating handle which can be removed and stored in a location which will be determined by the COR.

The gate operator shall have a nut aligned horizontally to accept connection by portable operators.

A position indicator shall be provided to show full open and closed positions divided by a minimum of 1/8 indicator marks. The indicator shall be attached to the lift mechanism.

3.2.9 Painting

The gate manufacturer shall be responsible for shop prime and finish

35 20 16.01 23 - 12 painting of all cast iron and steel accessories supplied. Paint all cast iron and steel components with a high solids epoxy coating recommended by the gate manufacturer. Submit the paint specification and instructions with the gate shop drawings. Stainless steel gates and accessories shall not be painted.

3.2.10 Stainless Steel Weld Inspection

All welds shall receive visual inspection by a Certified Weld Inspector (CWI). Welds must be inspected by a CWI in accordance with AWS D1.6/D1.6M including Annex H Recommended Inspection Practice with the exception that all welds of stiffeners to the slide skin plate must receive 100 percent Penetrant Testing (PT) or Ultrasonic Testing (UT) as applicable, in addition to visual inspection. Weld inspection reports shall be submitted which cover all of the CWI inspections. The report shall include an initital inspection report and an inspection of weld repairs where required by the initial inspection. The final report must clearly document that each weld is in conformance with AWS D1.6/D1.6M and must be signed by the CWI.

3.3 STORAGE

Upon delivery at the work site, bulky parts of the gate, such as the frame, slide and wall thimble, which have been coated with a complete paint system in the manufacturer's plant, may be stored outdoors provided these parts are stored on wood blocking not less than 8 inches above a base of washed gravel or crushed stone not less than 2 inches thick. All other elements of the gate shall be stored in a weather tight building. A framework covered with a plastic film, or any other such expedient or makeshift arrangement, will not be acceptable.

3.4 ERECTING ENGINEER

The Contractor shall furnish the services of a competent erecting engineer to supervise and direct the installation and testing of the gates furnished under this section. The erection engineer shall be present each of the following tasks:

(a) Complete installation of the wall thimble and all other items to be embedded in concrete;

(b) Complete installation of all gate components;

(c) Adjustment of all seals and wedges; and

(d) All specified testing.

The erecting engineer shall be a designated full-time employee of the gate manufacturer and shall have had at least five years of experience with the type of gate furnished under these Specifications. The erecting engineer shall be subject to the approval of the COR. The services of the engineer shall be furnished at no extra cost. The installation and testing of the gates under the direction and supervision of the erecting engineer shall in no way relieve the Contractor of sole responsibility for the gates meeting all requirements of the Specifications and fulfilling all the Contractor's guarantees.

35 20 16.01 23 - 13

3.5 FIELD INSTALLATION AND TESTS

3.5.1 Installation

3.5.1.1 General

All installation of the gates and appurtenances shall be in accordance with the manufacturer's installation instructions and under the supervision and direction of the erecting engineer specified. The slide gates shall be installed complete with frames, leaves, stems, adjustable stem guides, floorstands, dustproof stem covers, position indicators, anchor bolts, and all appurtenances necessary to provide a complete and workable installation. All elements of the gate shall be cleaned of all protective coating used thereon during shipment and storage; all rust, dirt, grit and other foreign matter shall be removed. Cast iron gates shall then be "touch-up" painted. Stainless-steel gates shall not be painted.

Each element of the gate shall be carefully and accurately aligned so that after it is fastened in place there will be no binding or excessive pressure or wear in any moving part and no distortion of any member. The wall thimble shall be internally braced during concrete placement.

Fasteners shall be tightened uniformly and firmly, but care shall be taken not to overstress either the fastener or the member with which it is associated. Where specific torque values or ranges are cited in the installation instructions, an accurately calibrated torque-wrench, having the proper capacity range, shall be used. Stilson wrenches, cold chisels, or other tools likely to cause injury to the surface of any part, shall not be used in the work of assembly or tightening.

All fasteners shall be installed with an anaerobic locking compound similar and equal to that of the LOCTITE Corporation. Cleaning prior to application of the locking compound shall follow the manufacturer's recommendations. All shims shall be of either bronze or corrosion-resisting steel. Where grouting is required, either an epoxy grout or a ready-to-use, non-shrinking grouting material, requiring only mixing with water at the work site, shall be used, and use of any grouting material shall be as recommended by the manufacturer. All blocking and wedges used for support during initial grouting shall be removed prior to final grouting.

3.5.1.2 Wall Thimble

After the concrete from the wall pour for the thimble has hardened and form removed, the front surface of the wall thimble should be thoroughly cleaned. Any concrete that has flowed on the surface from the edges shall be carefully removed. Care should be taken to prevent damage to machined surfaces.

3.5.1.3 Gate Installation

Prior to installation, the machined surfaces of the flange and wall thimble shall be thoroughly cleaned and inspected. Care should be taken to prevent damage to machined surfaces. Gasket placement shall be even and thorough.

Bolt tightening shall be even and follow manufacturer's recommendations.

3.5.2 Tests

The gates shall be operated and tested by and at the expense of the Contractor and under the supervision and direction of the erecting engineer

35 20 16.01 23 - 14 to determine if they have been properly manufactured, assembled and installed and if they meet the requirements of the specifications. The Contractor shall notify the COR at least 5 days prior to commencing the testing. The gates shall be operated through two complete cycles. Initial 6 inches of gate shall be advanced using the hand crank and the portable operator shall be used until the last 6 inches of gate advancement, which shall be done by the hand crank. The gates shall be checked in the closed position for leakage. Leakage shall meet not exceed the requirements of AWWA C560-14 for cast iron slide gates or AWWA C561-14 for stainless-steel slide gates.

Any malfunctions or discrepancies disclosed as a result of these tests shall be promptly remedied by the Contractor at no additional expense, and retests conducted.

3.6 GUARANTEE

Equipment furnished under this Specification section shall be guaranteed for a period of no less than one year from the date of final acceptance thereof against defective materials, design and workmanship. Upon receipt of notice from the Construction Manager or USACE of failure of any part of the guaranteed equipment during the guarantee period, a new replacement part or parts shall be furnished and installed promptly by the Contractor at no additional cost.

-- End of Section --

35 20 16.01 23 - 15