A. This section describes the fabrication and installation, by driving, of steel pipe piling, including cut-offs.

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1 SECTION STEEL PIPE PILES PART 1 - GENERAL 1.1 DESCRIPTION A. This section describes the fabrication and installation, by driving, of steel pipe piling, including cut-offs. B. Driving piles refers to both installation by vibratory hammers and traditional methods using impact hammers. This section refers to both methods unless the context clearly refers to one method only. C. Project Location: Interstate Navigation Co. 304 Great Island Road; Village of Galilee; Town of Narragansett, Rhode Island Waterway: Point Judith Pond Site Coordinates: Latitude: Longitude: D. Project Owner: Interstate Navigation Co. PO Box 482; New London, CT Tel. (860) Contact: Joshua Linda E. Project Engineer: The Winthrop Group Inc. PO Box 359 North Stonington, CT Tel. (860) Contact: Edward H. Wenke III, PE RI PE #5753 (exp. 06/2017) RI C.O.A. # 8282 (exp. 06/2018) F. Project Geotechnical Engineer: GZA Inc. 530 Broadway; Providence, RI Tel. (401) Contact: William L. Ladd PE - RI P.E. # REFERENCES A. AISC: American Institute of Steel Construction. B. ASTM: American Society for Testing and Materials. 1. ASTM A252: Standard Specification for Welded and Seamless Steel Pipe Piles C. AWS: American Welding Society. 1. AWS D1.1: Structural Welding Code Steel D. IBC: International Building Code. 1. IBC 2012 as amended by the State of Rhode Island Building Code SBC-1 E. Rhode Island Department of Transportation Standard Specifications for Road and Bridge Construction (Bluebook), Section Determination of Bearing Capacity, Amended August 2013 Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

2 F. Project Geotechnical Report: Geotechnical Letter Report Block Island Ferry Ramp Hoist Structure Replacement Prepared by GZA Inc. Dated July 1, 2016; Which shall be a part of these Specifications. 1.3 SUBMITTALS A. At least two weeks prior to mobilization at the site, submit data fully describing all proposed pile installation equipment including hammers, rams, driving cushions. B. Provide a Wave Equation Analysis of Piles (WEAP) prior to driving for each pile and hammer combinations to determine driving criteria (blows/inch), as well as to demonstrate that the piles can reach the minimum tip elevation without exceeding the allowable driving stress. The WEAP analysis should be performed by a Professional Engineer in the State of Rhode Island. C. Submit certification of yield strength and weldability of steel products by process acceptable to the Engineer, mill certificates of chemical and physical properties, or equivalent. D. Prepare and submit to the Engineer full length installation records for each pile installed. Submit records within 24 hours after installation is completed for the pile. Include the following minimum information: 1. Final tip elevation. 2. Cut-off elevation. 3. Description of unusual installation behavior or conditions. 4. Pile material and dimensional properties. 5. Elevations at welded joints. 6. Other data which may be useful in evaluating the pile. E. Submit prequalified welding procedure specification (WPS) for all welding processes. 1.4 QUALITY ASSURANCE A. The Engineer will provide special inspection as may be required by the Permitting Agency. B. Welder Qualifications: Qualify welders, welding processes, and procedures in accordance with AWS Structural Welding Code. 1.5 DELIVERY, STORAGE, AND HANDLING A. Deliver materials to the project site in such quantities and at such times to assure the continuity of pile driving operations in keeping with the project schedule. B. Store piles in orderly groups above ground and blocked during storage to minimize possible distortion of members. Piles exhibiting variations beyond tolerance limits will be considered distorted and may not be used in the work. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

3 1.6 PROJECT CONDITIONS A. Contractor to verify all existing site conditions including but not limited to elevations, layout coordinate control, dimensions, available available/suitable site area for laydown and rigging/pile driving, all equipment removals/replacement inventories to execute work. B. Protect all existing adjacent and near-by structures, buildings, docks, equipment and pavement surfaces from damage caused by pile driving operations. PART 2 - PRODUCTS 2.1 OPEN-END PIPE PILE AND COATINGS A. Pipe Piles: OD x thk wall carbon steel OD x thk wall carbon steel 3. Meet the requirements of ASTM A252, Grade 3 Modified, Fy = 50 ksi min; 4. Piles installed with vibratory hammers shall be open-ended. 5. Welds joining pipe piles shall be complete penetration groove welds. B. Coat all steel pipe piles from top of pile to 10 feet below mudline with a coal tar epoxy coating system. Coal tar epoxies shall be self-priming, two-component, coal tar epoxy polyamide meeting or exceeding the requirements of SSPC Paint 16 and the U.S. Army Corps of Engineers Formula C-200a. Minimum percent solids by volume shall be 74%. C. Prepare steel surfaces to be coated by near-white blast cleaning in accordance with SSPC SP 10/NACE No. 2 and the coating manufacturer s recommendations. Apply coating in accordance with the coating manufacturer's recommendations, SSPC PA 1, and as specified herein. Coal tar epoxy coatings shall be applied using spray application to a minimum total dry film thickness of 16mils, as measured in accordance with SSPC PA 2. Apply in multiple coats of no more than 8 mils per coat. Apply number of coats required to achieve total specified dry film thickness. D. Any damage to the epoxy coating system shall be repaired using the high solids coal tar epoxy coating and application methods recommended by the original pile coating manufacturer. Fabrication: Provide pile cap plates and fasten to piles with welded connections as shown on the drawings. 2.2 PILE-DRIVING EQUIPMENT A. Driving equipment shall be of a type generally used in standard pile-driving practice and shall be operated at the manufacturer s specified rate to develop the required rated energy. Drop hammers will not be allowed. B. Vibratory Hammers may be used to set and drive the piles to within 5 feet of the final pile tip elevation. Impact hammer shall be used for final 5 feet of driving to final pile tip elevation to verify capacity. If this method is used, a 5-7 days waiting period between vibratory driving and Impact Hammer driving shall apply to allow silt soils to set up around pile. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

4 C. Impact hammers shall be steam, air, or diesel driven and shall develop a minimum rated energy of 24,000 foot-pounds per blow and no more than 33,000 foot-pounds per blow or as required to achieve the necessary pile tip penetration. The Contractor shall be responsible for selecting driving equipment that will not cause damage to the piling or adjacent structures during driving. D. Vibratory hammers shall be of sufficient size and energy to install piles to 5 feet above the required tip elevation. E. Driving caps shall be capable of protecting pile head and providing uniform distribution of energy to pile head. F. Use fixed rigid type pile driver leads that will hold the pile firmly in position and alignment, and in axial alignment with the driving equipment. Free-swinging, flying leads will not be permitted, except for batter piles. Extend leads to within 2 feet of the elevation at which the pile enters the water. PART 3 - EXECUTION 3.1 EXISTING PILE REMOVALS A. Identify all existing steel pipe piles that are to be removed or abandoned within the work area. B. Remove existing steel frame hoist ramps & hinge pins. Ramp assemblies to be saved in whole for refurbishment and replacement. C. Remove all existing hoist cable systems in way of new work. D. Torch cut and remove existing welded steel hoist frame assemblies from top of piles. Retain removed welded steel hoist frames in whole for refurbishment and replacement. E. Torch cut and remove existing lower level structural WT steel pile bracing and misc. steel members to bulkhead hinge beam. F. Torch cut portions of existing steel frame ground approach ramps in way of hinge beam removal. G. Torch cut and remove existing steel hinge beams. Cut-off existing hinge beam piles to min 24 below bottom of hinge beam and abandon steel pipe hinge beam piles in place. H. Remove fill length of existing steel pipe hoist piles entirely from embedded depth. 3.2 NEW PILE-DRIVING PLANT A. Drive pipe piles with an impact or vibratory hammer which is capable of advancing the piles to the desired tip elevation without damage. Hammers may be single-acting, double-acting, or differential; or a diesel hammer may be suitable. Open-ended pipe piles may also be installed with a vibratory type hammer. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

5 B. Provide equipment of adequate size and capacity to handle, place, drive, and hold the piles to the required penetration and alignment. This equipment shall be able to maintain the alignment of pile and hammer without damage to either. C. Driving equipment shall be in good repair and operating condition and shall be capable of being operated as recommended by the manufacturer. D. Maintain all pile-driving equipment in safe operating condition at all times. E. Any equipment or method which results in regular or repeated damage to piles during driving, or is detrimental to the bearing capacity of piling already driven, will be rejected by the Engineer. F. Perform pile driving operations within the site constraints as directed by Owner so as not to impede on any other Owner related site activities or usage. Do not impede/hamper/adversely affect any operations or usage of any adjacent properties during pile installation. 3.3 NEW PILE INSTALLATION AND DRIVING CRITERIA A. Locate each pile accurately in accordance with the drawings. Reference cut-off elevation of each pile to bench marks established as shown on drawings. B. Mark each pile with horizontal lines at 1-foot intervals, and mark the number of feet from pile point at 5-foot intervals. Place marks prior to the start of driving. Marks and numbers shall be readily seen from a minimum distance of 15 feet. C. Take care in the first 10 to 12 feet of pile penetration where possible foreign objects in the initial soil strata may be present. D. Continuously drive each pile to tip elevation as shown on the drawings, and to satisfactory embedment and driving resistance as established by the Geotechnical Report. 1. Drive piles to embedment lengths or blow counts driving criteria (blows/foot) from the WEAP that needs to be met at that elevation or deeper, if necessary. 2. The Contractor shall record counting blows per foot to verify capacities per WEAP results. 3. Pipe Piles are designed based on an Ultimate Axial Load that is more than 2.75X the actual Working Load. All final Ultimate Loads per pile are less than 50 tons. No pile Axial Load Testing is required. E. Carefully maintain the center of gravity for each group of piles to conform to the locations shown on the drawings. 1. Hoist Piles shall be installed in same locations as original existing (removed) piles. 2. Hinge Beam Piles shall be located per the contract drawings. F. Carefully plumb the leads and the pile before driving. Take care during driving to prevent and to correct any tendency of piles to twist or rotate. G. Drive all hoist pipe piles using a fixed template furnished by the Contractor. Template to match existing hoist pile locations.. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

6 H. Jetting for installation of piling is prohibited. I. Avoid excessive driving, as established by the Geotechnical Engineer. J. After pile is cut off, weld a watertight level cap plate in place, square and level on top of the pile. K. Installation of Hinge Beam Piles will be in close proximity to the existing steel sheet pile bulkhead. Contractor shall not damage any portion of the sheet pile bulkhead or cap channel and walers. 3.4 TOLERANCES A. Deviation of pile head of hinge pipe piles under the hinge beam may be 6 inches horizontally from plan position to clear abandoned piles. Hinge beam piles shall be centered below the proposed hinge beam alignment, and ± 1/4 inch from the cut-off elevation shown on the drawings or as required for hinge beam/ramp fit-up. B. Deviation of pile head of hoist pipe piles under the hoist frame assemblies shall be ± 1 inch from original location of existing hoist pile horizontal location, and ± 1/4 inch from the cut-off elevation shown on the drawings or as required for hoist frame steel fit-up. 1. Piles out of tolerance will be rejected, and shall be removed and replaced with new piles. 2. Plumb piles shall not exceed a deviation from the vertical alignment of more than 1 inch in 10 feet. 3. No Battered piles are proposed. C. Measure tolerances when piles are released from the driving template.. D. The Contractor shall employ a competent field person to: 1. Survey the location and alignment of each pile to verify that it meets contract requirements. Submit field notes to the Engineer on the same day as the work. 2. Survey and verify the alignment of joined pile sections before and after driving. 3.5 WELDING A. Fabricate accurately to lines and dimensions shown on the drawings. B. Make no more than one field splice and one shop splice per pile unless permitted otherwise by the Engineer. Splice piles by complete joint penetration weld. Carefully align and hold pieces firm and concentric until welding is complete. Provide backing bar (minimum 1/4 inch thick) for all splices. Underwater welding for pile splicing is prohibited. Splices shall develop the full strength of the pile in tension, bending, and bearing. C. Workmanship and technique shall be of the same standard as for structural steel assembly. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

7 3.6 PIPE PILE ASSEMBLY AND FIT-UP A. Pipe pile assembly shall follow the applicable sections of AWS D1.1-10, Chapter 5, Fabrication, and as modified below. 1. Articles through shall be used as noted for butt joints. Article shall be modified as noted in the following: In the second sentence, delete or 1/8 inch (3 mm), whichever. ; also delete the second to the last sentence, which reads, in part, In correcting... in 12 inches (305 mm). 2. Joint root offset shall not exceed 10 percent of the joined material thickness or 1/16 inch for butt joints landing on backing bars (Article ). B. All piling, piling assembly, and fit-up shall meet the requirements of ASTM A252 for welded and seamless pile, Article 12, Permissible Variations in Weights and Dimensions, Article 13, Straightness, and Article 14, Workmanship, Finish, and Appearance. C. All pile splices shall be located a minimum of 40 feet below the pile top (cut-off elevation) to ensure the maximum moment is not located at the splice location. D. All joining sections shall be field-matched and marked for verification to minimize outside diameter differences and shall meet a maximum of 1/16 inch landing difference on each side (total of 1/8 inch). E. No pressure tests are required for pipe piles. F. Dents, gouges, or arc strikes in the piling greater than 1/8 inch shall be removed or repaired as required under AWS. 3.7 CUTTING OF PILES A. Cut off tops of piles square with the pile axis and at the elevations indicated. B. Adjust Top of Pile Cut-Off Elevations as may be required for Misc. Steel member fit-up. 3.8 OBSTRUCTIONS DURING DRIVING A. Minor obstructions are obstructions encountered within 10 feet of mud line. Should an obstruction at any greater depth stop the advancement of a pile, it will still be classed as a minor obstruction unless the same obstruction also stops the advancement of a second pile adjacent to the first. No extra payment will be made for the removal of a minor obstruction. B. Major obstructions are obstructions not classed as minor. A major obstruction will be determined as such after engineering review of pertinent field conditions and driving data. In addition, the Owner reserves the right to require the Contractor to demonstrate, at no additional cost to the Port, that the pile cannot be driven by conventional means. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

8 3.9 REJECTED PILES A. Associated remedial work necessary to acceptably complete the pile installation shall be performed as required by the applicable code. Such remedial work may include, but is not limited to, installation of additional piling, construction of additional framing, and removal and reinstallation of piling. No extra payment will be made for remedial work required to acceptably complete pile installation. B. No payment for furnishing, driving, cut-off, or extending will be made for any piling installed by the order of the Owner to correct or replace piles which are out of tolerance, misaligned, broken, incorrectly oriented, or otherwise violate these specifications, or for removing and reinstalling any piling incorrectly installed. Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI

9 END OF SECTION Ferry Hoist Ramp Pile Replacement Interstate Navigation Co. 304 Great Island Rd; Narragansett, RI