UNTIL 3:00 PM LOCAL TIME ON JUNE 29, 2015 AT WHICH TIME BIDS WILL BE PUBLICLY OPENED. APPENDIX H TECHNICAL SPECIFICATIONS PILE REPAIR

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1 ALASKA RAILROAD CORPORATION 327 W. Ship Creek Ave. Anchorage, AK Phone Fax June 11, 2015 Addendum Number 1 Invitation to Bid ARRC Seward Marine Passenger Dock 2015 Pipe Repair & Cathodic Protection System This addendum is being issued to provide information as follows: SEALED BIDS WILL BE RECEIVED AT: Alaska Railroad Corporation Attn. C. Lee Thompson, 2 nd Floor 327 W. Ship Creek Avenue Anchorage, Alaska UNTIL 3:00 PM LOCAL TIME ON JUNE 29, 2015 AT WHICH TIME BIDS WILL BE PUBLICLY OPENED. PART 1 GENERAL 1.01 DESCRIPTION APPENDIX H TECHNICAL SPECIFICATIONS PILE REPAIR SECTION STEEL FRICTION COUPLER PILE REPAIR SYSTEM A. This section describes the method of pile repair and the required surface preparation. Piles to be repaired are identified on the plans. The repairs occur at, slightly below and slightly above 0 MLLW. The purpose of the Friction Coupler pile repairs is to reinforce heavily corroded areas of piles including butt welds occurring near 0 MLLW. The specified Friction Coupler pile repair system shall be designed to rebuild the pile to the original section properties as outlined in this specification. The work specified in this section consists of surface preparation of the pile and a Friction Coupler method of pile repairs. The repairs are to be performed under an existing dock in the tidal zone and in an area where access is difficult due to a large number of piling and large changes in the water level due to tides. The repair program must be scheduled

2 and executed in a manner that does not interfere with scheduled dock usage. This scheduled usage included cruise ship and cargo operations. The dock has strict security regulations and all workers and operations must be in compliance with these regulations at all times. There are two types of piles to be repaired; BP-14x102 and BP-14x89. Several of the piles outlined to be repaired have previous bolted channel sections in the repair area. These must be removed prior to the new friction coupler installation. Alternatively, the supplier of the Friction Coupler pile repair system MAY be able to design a repair that bridges the existing repair channels allowing them to remain in place. If this type of repair is performed it MUST include documentation that the modified Friction Coupler system meets or exceeds the original pile section properties. B. This specification is intended for use in defining the requirements of strengthening using a steel Friction Coupler pile repair system. C. The Contractor shall furnish all materials, tools, equipment, transportation, necessary storage, access, labor and supervision required for the proper application of the system. D. The work may require the use of commercial divers. If commercial divers are used, all diving will be in accordance with the Association of Diving Contractors Intentional (ADCI) standards SUBMITTALS A. Product Data Prior to commencement of the work, the Contractor shall submit for approval, manufacturer s data sheets for each material to be used in the work, specifications, and recommended application procedures showing compliance with the project requirements. 1. Pile Friction Coupler system including a statement that the system will meet the performance requirements for repair along with backup such as test results for the repair system. The performance requirements include rebuilding the pile to the original section properties or better. 2. Pile cleaning methods and apparatus B. Prior to commencement of the work, the Contractor shall submit shop drawings to the Engineer for review. The list of shop drawings shall include, but not necessarily be limited to: 1. Detail dimensions and fabrication details of the friction coupler system.

3 C. Work Plan: Submit detailed Work Plan 15 days prior to commencing field work. The work plan shall include details on access under the dock and methods to remain in compliance with the ARRC Marine Terminal security regulations. D. Detailed construction schedule. E. Divers ADCI qualifications (if divers are used). F. Applicators Quality Control Procedures: Submit for approval 15 days prior to commencing field work. PART 2 PRODUCTS 2.01 ACCEPTABLE MANUFACTURERS A. Friction Coupler Pile Repair System: Pilecap H Pile Repair System by Pilecap, Incorporated; PO Box 15895, Overland Park, Kansas Telephone 913/ This repair concept is subject to a patent by Pilecap, Inc. Friction couplers are also distributed by Five Star Marine. B. Approved equal which satisfies all of the requirements of this specification FRICTION COUPLER: Approved Pilecap Friction Coupler System to be supplied by Pilecap, Inc. products include: A. Steel Plates: Manufactured from ASTM A572, Grade 50 steel. Assemblies shall be fabricated to the minimum lengths specified on the drawings. Assemblies shall be fabricated in accordance with Section Each friction coupler shall be capable of restoring the pile to the original section properties as shown below: H PILE ORIGINAL SECTION PROPERTIES Section Wall Thickness X-X Y-Y in Ix (in^4) Sx (in^3) Rx (in) Ix (in^4) Sx (in^3) Rx (in) BP 14x102 BP 14x

4 B. Bolting Assembly: Bolts and nuts shall be ASTM A 325, Type 1, heavy hex steel bolts and ASTM A 563 heavy hex nuts. PART 3 EXECUTION 3.01 The work described under this specification shall be performed by an applicator with proven past experience performing similar repairs under similar conditions. The applicator company shall provide a quality control procedure in compliance with the Friction Coupler manufacturer s installation requirements PILE PREPARATION A. Prior to installation of the pile jackets, all pile surfaces shall be thoroughly cleaned of marine growth, oil, grease, mud, rust, micro-organisms and any other deleterious material. Piles shall be cleaned utilizing mechanical or high pressure high volume water jet blasting equipment. Effective progress of the work may require that some of this work be performed underwater. The underwater environment at the site can be described as cold with reduced visibility and variable current. B. Pile cleaning shall produce a finished surface over the entire area to be repaired that will result in a proper friction couple as outlined by the manufacturer of the Fiction Coupler pile repair system. C. Some of the piles identified for repair may be too close to an adjacent pile to permit operation of the mechanized cleaning device and will require manual cleaning. D. Measure and record the wall thickness of the pile in the Friction Coupler clamping area INSTALLATION OF FRICTION COUPLER A. Friction couplers shall be installed within 7 days of initial cleaning and surface preparation. B. Coupler Assembly 1. Coupler assembly and positioning around the pile shall be performed by the Contractor in such a manner as to assure that no damage to pile or assembly occurs and that there will be no detrimental movement of the coupler prior to tightening the bolts. 2. Rig both bent plates at the provided pad eye location and place them inside the h-pile at the specified vertical install location. Draw both bent plates in until contact is made with the web surface. Ensure plates are installed such

5 that the upper and lower 4 feet of length are located at structurally sound zones on the H-pile. 3. Place friction coupler bars and hand tighten two bolt sets for each friction coupler - one in the second hole from the top and one in the seventh hole down repeating until all eight friction coupler bars are held in place. Place a washer under both bolt head and hex nut with nuts on the outside surface of each friction coupler. 4. Place two cross bars with two hand tightened bolt sets at the top and bottom of each set of friction coupler bars. Place a washer under both bolt head and hex nut with the nuts on the outside face of the friction coupler. 5. Install remaining bolts by hand with a washer under both bolt head and hex nut with the nuts on the outside face of the friction coupler. 6. Tighten bolts in a standard crisscross sequence starting in the middle of each friction coupler and working outward until a torque of 1600 ft-lbs is achieved. 7. All pneumatic or hydraulic wrenches shall be calibrated at least once each shift. Calibration shall be checked with a manual torque wrench and each calibration recorded. If pneumatic wrenches are used the air pressure shall be closely regulated. Provision shall be made to depth adjust pneumatic wrenches PROCEDURE MODIFICATIONS A. Installation procedures may be modified to achieve maximum results, subject to approval by the Engineer. Procedure modifications shall be submitted to the Engineer for review prior to implementing the modifications FIELD QUALITY CONTROL A. Installers: Record location including pile row and column number along with coupler elevation of each pile repaired. Also measure and record the wall thickness of the pile in the Friction Coupler clamping area. Complete a weekly report and submit to Engineer. The prime contractor shall provide a Quality Control (QC) inspector, approved by the Project Engineer, to periodically observe and approve critical steps in the installation process. This is commonly the project manager or diving supervisor. Items to monitor include materials certifications, pile surface preparation, and jacket installation procedures. The pile jacket shall be completely inspected by the Contractor s QC Inspector during and immediately following application of the system. Periodically observe

6 all aspects of preparation, cleaning, and application of fiction couplers, including the following: 1. Calibration of pneumatic or hydraulic wrenches. 2. Pile cleaning and surface preparation. 3. Installation of Friction Coupler system. 4. Proper tightening of the bolts. For each week or partial week, of pile repairs completed, the Contractor s QC Inspector shall prepare a written and signed certification letter that all work on the subject piles was performed in accordance with the Project Specification. B. Inspection by Manufacturer of Friction Coupler: 3.06 REPAIRS The manufacture of the Friction Coupler system shall provide a factory representative to periodically observe all aspects of installation. At a minimum the first 6 piling to be repaired shall be monitored by the manufacturer s representative. At a minimum the manufacturer s representative shall provide a final inspection and a written inspection report immediately following application of the entire system. A. All defects (as determined by the Inspector or as specified by the Engineer), shall be repaired. END OF SECTION

7 SECTION STRUCTURAL STEEL FRICTION COUPLERS PART 1 GENERAL 1.01 SUMMARY A. This Section covers fabrication of Friction Coupler pile repair system steel members. B. The friction coupler jacket is a proprietary (patented) product which shall be fabricated by and per the requirements of Pilecap, Inc. Coupler products are also distributed by Five Star Marine. In no case shall the manufacturer s requirements be less than those stated herein SUBMITTALS A. Product Data: For each type of product indicated. 1. Friction Coupler B. Shop Drawings: Show fabrication of structural-steel components. 1. Friction Coupler C. Welding certificates. D. Mill test reports. E. Source quality-control test reports. F. Source quality-control certification of compliance testing by AISC-Certified Plant and/or Qualified Independent Testing and Inspection Agency. G. Independent Testing and Inspection Agency and Qualified Inspector qualifications or documentation of either: 1. AISC Quality Certification designation as AISC-Certified Plant, Category Sbd or Sbr, or 2. ISO 9001:2000 standard certification, or 3. International Accreditation Service (IAS) AC172 certification QUALITY ASSURANCE A. Welding: Qualify procedures and personnel according to AWS D1.1, "Structural Welding Code--Steel."

8 B. Comply with applicable provisions of AISC's "Code of Standard Practice for Steel Buildings and Bridges." PART 2 PRODUCTS 2.01 STRUCTURAL-STEEL MATERIALS A. Plate and Bar: ASTM A 572, Grade 50. B. Welding Electrodes: Comply with AWS requirements, minimum 70 ksi yield BOLTS, CONNECTORS, AND ANCHORS A. High-Strength Bolts, Nuts, and Washers: ASTM A 325, Type 1, heavy hex steel structural bolts; ASTM A 563 heavy hex carbon-steel nuts; and ASTM F 436 hardened carbon-steel washers FABRICATION A. Structural Steel: Fabricate and assemble in shop to greatest extent possible. Fabricate according to AISC's "Code of Standard Practice for Steel Buildings and Bridges" and AISC's "Specification for Structural Steel Buildings--Allowable Stress Design and Plastic Design." B. Butt joints shall be made tight and flush before welding. Grind sharp edges smooth. C. Perform welding in such a manner to prevent warpage. Shop assemble or test fitup by other fabrication methods. Straighten warped jackets prior to delivery to site SHOP CONNECTIONS A. Weld Connections: Comply with AWS D1.1 for welding procedure specifications, tolerances, appearance, and quality of welds and for methods used in correcting welding work SOURCE QUALITY CONTROL A. Contractor shall engage an independent testing and inspecting agency to perform shop tests and inspections and prepare test reports. Comply with testing and inspection requirements of Part 3, paragraph QUALITY CONTROL. B. Components fabricated by a qualified fabricator certified per the following shall not be subject to additional independent testing and inspection agency requirements of Part 3, paragraph QUALITY CONTROL: 1. AISC Quality Certification designation as AISC-Certified Plant, Category Sbd or Sbr, or

9 2. ISO 9001:2000 standard certification, or 3. International Accreditation Service (IAS) AC172 certification. C. Correct deficiencies in Work that test reports and inspections indicate does not comply with the Contract Documents. PART 3 EXECUTION 3.01 FABRICATION A. Ease all exterior edges by grinding approximately 1/ ERECTION A. Set steel Friction Couplers accurately in locations and to elevations indicated CONNECTIONS A. High-Strength Bolts: Install high-strength bolts according to RCSC's "Specification for Structural Joints Using ASTM A 325 or A 490 Bolts" for type of bolt and type of joint specified QUALITY CONTROL 1. Joint Type: Pretensioned. A. Testing Agency: Contractor shall engage a qualified independent testing and inspecting agency to inspect shop welds. 1. In addition to visual inspection of all welds, welds shall be tested according to AWS D1.1 and the following inspection procedures, at testing agency's option: a. Liquid Penetrant Inspection: ASTM E 165. b. Magnetic Particle Inspection: ASTM E 709; performed on root pass and on finished weld. Cracks or zones of incomplete fusion or penetration will not be accepted. c. Perform liquid penetrant or magnetic particle testing on 10% of welds. 2. Welded studs shall be periodically inspected visually and by bending per the requirements of AWS D1.1, Section 7. a. An AWS qualified inspector shall perform inspection of all welded studs per AWS D1.1, Section 7.7 Production Control and Section 7.8 Fabrication and Verification Requirements.

10 B. Correct deficiencies in Work that test reports and inspections indicate does not comply with the Contract Documents. END OF SECTION

11 APPENDIX I TECHNICAL SPECIFICATIONS CATHODIC PROTECTION SECTION CATHODIC PROTECTION SYSTEM REPAIRS PART 1 GENERAL 1.01 DESCRIPTION A. This section describes repair requirements for the cathodic protection system associated with the Alaska Railroad Seward Passenger Dock. The existing cathodic protection system is comprised of a sacrificial anode system (located on the first nine pile rows), and an impressed current cathodic protection system (located on the remaining rows of piles.) Repair scope items include the following: 1.02 SUBMITTALS a. Sacrificial Anode Connection Repairs (Pile Bents 1 4) b. New Sacrificial Anode Installation (Pile Bents 5 9) c. Impressed Current DC Header Cable Reroute (Rectifier 9) d. Impressed Current DC Header Cable Replacement (Rectifier 10) e. Impressed Current Anode Replacement (Pile Bents 10 63) A. The Contractor shall submit the following for approval, prior to procuring materials: a. Manufacturer s Product and Catalog Cut Information: Product data and catalog cut information shall be submitted for each item listed in this Specification. Product information shall include the manufacturer s name, and sufficient information to demonstrate that the materials meet the requirements of the drawings and specifications. Where more than one item or catalog number appears on a catalog cut, the applicable item(s) proposed for use shall be clearly identified. B. Work Plan: Submit a detailed Work Plan 15 days prior to commencing field installation activities. The work plan shall include details on access under the dock, safety precautions and measures required to perform the work, and methods to remain in compliance with ARRC Marine Terminal security regulations. C. Detailed construction schedule 1.03 QUALITY CONTROL

12 A. Qualifications: Contractor must have a valid Contractor s license issued by the State of Alaska and a minimum of two years experience installing marine related cathodic protection systems. B. Drawings: The cathodic protection system drawings are based on best available information and are not scaled for exact locations unless otherwise noted or dimensioned on a specific drawing or detail. Conditions may vary requiring field location of components to avoid interference with existing equipment or pile splints on the structure. C. Inspection: It is the Contractor s responsibility to perform work to the requirements of this Specification and to conduct the necessary inspections and tests to ensure proper installation and compliance. The Owner may conduct and or witness any inspection deemed necessary to verify compliance DELIVERY, STORAGE AND HANDLING A. Inspect all cathodic protection materials upon delivery to verify components are of the proper make, model and part number (as specified herein and on the project drawings); are free of damage; and are provided in sufficient quantities to complete the project as designed. B. Store all cathodic protection materials in a dry, protected location to prevent impact, spark and weather related damage. PART 2 PRODUCTS 2.01 SACRIFICIAL ANODES: ALUMINUM PILING ANODES A. Anodes shall be aluminum type and shall conform to the following metallurgical composition: Element Indium (In) Zinc (Zn) Silicon (Si) Copper (Cu) Iron (Fe) Percent Composition 0.02 percent (max.) 5.75 percent (max.) 0.12 percent (max.) percent (max.) 0.12 percent (max.)

13 Cadmium (Cd) Others Aluminum percent (max.) 0.02 percent (max. each) or 0.05 percent (max. total) Remainder B. Anodes shall be cast with a carbon steel rod core. Anode ingots shall be 35 pound Aluminum (ALOLINE 39RT or approved equal) IMPRESSED CURRENT ANODES: HIGH SILICON CAST IRON A. Anodes shall be 84-inch tubular high silicon cast iron type and shall conform to ASTM A518, Grade 3 with the following metallurgical composition: Element Silicon (Si) Chromium (Cr) Carbon (C) Manganese (Mg) Copper (Cu) Molybdenum Iron (Fe) Percent Composition percent (min.) and percent (max.) 3.25 percent (min.) and 5.00 percent (max.) 0.70 percent (min.) and 1.10 percent (max.) 1.50 percent (max.) 0.50 percent (max.) 0.20 percent (max.) Remainder B. Anodes shall be cast with a 200 foot lead wire of #6 stranded copper with HMW- PE insulation. Anode nominal weight shall be 123 pound minimum (Anotec Model 4884LZ or approved equal) CABLE A. DC header cables shall be 750 MCM, stranded copper cables with XHHW-2 insulation in accordance with ASTM D1248, Type 1, Class C. B. All cables shall be continuous and splice free from their point of origin (anode or rectifier) to the designated termination point (junction box or structure connection.) 2.04 EXOTHERMIC WELD CONNECTIONS

14 A. Charges and Molds: Exothermic weld charges and molds shall be appropriately sized for vertical connection of DC Negative cable structure cables to steel pile members in accordance with manufacturer recommendations. B. Approved exothermic weld manufactures include Erico Cadweld or Continental Industries ThermOweld materials. Specific materials for each application are as follows: 1. Horizontal Installations: Manufacturer: Erico ThermOweld Mold: HSD-4L M-2542 Charge: Vertical Installations: Manufacturer: Erico ThermOweld Mold: VSD-4L M-1649 Charge: C. Exothermic welds shall be covered with an approved, pre-primed encapsulation cap. Acceptable materials include the following: 1. Chase Corporation Royston Handy Cap XL IP 2. Continental Industries Ci ThermOcap PC 3. Approved Equal PART 3 EXECUTION 3.01 PREPARATION A. Prior to commencing installation activities, the Contractor should review the Project Drawings and Specifications to become familiar with the scope of work and general location of the work to be performed. B. All cathodic protection materials shall be inspected for defect or damage prior to installation SACRIFICIAL ANODE CONNECTION REPAIRS (BENTS 1 4)

15 A. Field location of existing sacrificial anode installations on H-piles located within bents 1-4 will be required. Best available information indicates that the existing anode installations are located on every other H-pile within the target pile bent rows. B. Refer to Project Drawings for new anode connection bracket requirements to be installed on H-piles located within bents 1-4. C. Prepare the pile surface and existing anode core rods to receive anode bracket attachment by removing a sufficient amount of corrosion scale and by-product from pile surface (approximately 3-inch by 3-inch for each connection point) and cleaning the exposed surfaces to bare, bright metal. The weld attachment areas must be thoroughly cleaned and dried and to ensure a proper weld. D. Welds shall be visually inspected for proper workmanship. No formal Non- Destructive Examination is required NEW SACRIFICIAL ANODE INSTALLATION (BENTS 5 9) A. Field location of existing sacrificial anode installations on H-piles located within bents 5-9 will be required. Installation of new sacrificial anodes shall be located on pile immediately adjacent to the existing installation within the same Bent row. Best available information indicates that the existing anode installations are located on every other H-pile within a given Bent row. Locations with depleted existing anode installations shall be removed, and new anodes installed in their place. B. Anode position(s) shall be located vertically on the applicable H-pile at a height that allows for the greatest amount of the anode surface(s) to be submerged while the water level is at low tide. The anode bracket attachment points are allowed to be above water level during low tide. C. Refer to Project Drawings for new sacrificial anode bracket and anode assembly requirements to be installed on H-piles located within Bents 5-9. Means and methods for any pre-assembly of the anode and bracket assembly are at the discretion of Contractor. D. Prepare the pile surface to receive anode bracket attachment by removing a sufficient amount of corrosion scale and by-product from pile surface (approximately 3-inch by 3-inch for each connection point) and cleaning the exposed surfaces to bare, bright metal. The weld attachment areas must be thoroughly cleaned and dried and to ensure a proper weld.

16 E. Welds shall be visually inspected for proper workmanship. No formal nondestructive examination (NDE) or inspection is required DC HEADER CABLE REROUTE (RECTIFIER 9) A. Rectifier 9 shall be de-energized and the DC header cables disconnected from the unit s DC output lugs. Cables will then be pulled back to the adjacent exterior conduit entry point located immediately north of the rectifier unit. B. Install cables within the target conduit as shown on the project drawings and route back to the Rectifier 9 cabinet. C. Install cable through the cabinet entry points and re-terminate on the appropriate DC output lugs. Verify that cables have been correctly landed (e.g. dock structure cable landed on the DC Negative output lug and header cables to under-dock junction box landed on the DC Positive output lug.) D. Re-energize the rectifier unit and take rectifier voltage and amperage output readings at the rectifier (R9) and associated CP Distribution Junction Box (JB-9) to verify proper system performance. Record all measurements for Engineering review prior to final testing and commissioning of the completed repairs DC HEADER CABLE REPLACMENT (RECTIFIER 10) A. Rectifier 10 shall be de-energized for disconnection and removal of the damaged DC Positive and Negative header cables. Remove the faulty cable from the associated carrier conduit(s) and properly recycle and/or dispose of. B. Replace the removed cables with new 750 MCM XHHW stranded copper headers and route back to the rectifier unit. Header cables shall be installed in sufficient length to allow for continuous and splice free routing from their point of origin (rectifier unit) to their termination points (JB-10 junction box and dock structure connection). Residual slack shall be left at each termination point to prevent damage from expansion and contraction activity or difficulty in reterminating temporarily disconnected leads. C. The DC Negative header shall be routed to the same approximate connection point as utilized in the original installation or an alternate, pre-approved connection point in close proximity to the rectifier unit. D. Connect the replacement cables to the appropriate connection points with the rectifier unit (DC output lugs), under-dock junction box (JB-10), or dock structural member.

17 E. DC Negative cable connection to the dock structure will require permanent exothermic weld attachment and encapsulation utilizing the materials specified in Section 2.04 of this Specification. Perform weld attachment and encapsulation using the appropriate cleaning, pre-heating and installation methods specified in the Manufacturers installation instructions and recommendations. E. Re-energize the rectifier unit and take rectifier voltage and amperage output readings at the rectifier (R10) and associated CP Distribution Junction Box (JB- 10) to verify proper system performance. Record all measurements for Engineering review prior to final testing and commissioning of the completed repairs IMPRESSED CURRENT ANODE REPLACEMENT (BENTS 10 63) F. Failed anodes have been identified by their wire lead landing locations in each junction box set as shown on the Project Drawings. The Contractor shall field verify locations of failed anodes and cable routing prior to de-energizing the system. G. Identified failed anodes and associated wiring shall be removed and properly recycled or disposed of. H. Care shall be taken during removal of existing anodes and wiring to salvage and reuse existing conduit attached to the H-piles running from concrete pile cap to sea floor. I. New anode placements shall match removed East/West locations and/or utilize adjacent locations between bents as specified in the Project Drawings. J. Replacement anode lead wires are to be routed through existing conduit and attached in a clean, orderly workman-like manner to the concrete pile cap for routing back to the associated junction box. K. In locations where existing conduit interferes with new pile splint installations (12 locations between Bents 11 16), the conduit shall be temporarily removed and supported. The conduit shall be reattached upon completion of the pile splint installation. L. Anode installation locations that have obstructed or damaged conduit, such that is cannot be re-used, shall install new materials that match the existing installations as shown in the Project Drawings. New/replacement conduit installations shall utilize 1-1/2-inch diameter, Schedule 80 PVC conduit in lieu of galvanized rigid metal conduit.

18 M. After re-energizing the impressed current system, current (amperage) readings shall be taken and documented at each anode lead to ensure proper connection and system performance CATHODIC PROTECTION SYSTEM TESTING & COMMISSIONING A. Verify with the Contractor and Project Representative that all cathodic protection system installation have been completed and are solidly attached. As-builts of the new and existing installation locations shall be provided to the Project Representative after installation. B. Verify electrical continuity of installed components with dock structure. C. A full dock cathodic protection testing and commissioning survey shall be completed by others. END OF SECTION

19 PART 1 GENERAL 1.01 SECTION INCLUDES SECTION SACRIFICIAL ANODE CATHODIC PROTECTION SYSTEM A. Requirements for installation of new sacrificial cathodic protection anodes associated with the Alaska Railroad Seward Passenger Dock. Sacrificial cathodic protection include installations of aluminum anodes to H-piles in rows 5-9 of the dock structure SUBMITTALS A. The Contractor shall submit the following for approval, prior to procuring materials: 1. Manufacturer s Product and Catalog Cut Information: Product data and catalog cut information shall be submitted for each item listed in this Specification. Product information shall include the manufacturer s name, and sufficient information to demonstrate that the materials meet the requirements of the drawings and specifications. Where more than one item or catalog number appears on a catalog cut, the applicable item(s) proposed for use shall be clearly identified QUALITY CONTROL A. Qualifications: Contractor s must have a valid Contractor s license issued by the State of Alaska and a minimum of two years experience installing cathodic protection systems. B. Drawings: The cathodic protection system drawings are based on best available information and are not scaled for exact locations unless otherwise noted or dimensioned on a specific drawing or detail. Some conditions may vary requiring field location of components to avoid interference with existing equipment or pile splices on the structure. C. Inspection: It is the Contractor s responsibility to perform work to the requirements of this Specification and to conduct the necessary inspections and tests to ensure proper installation and compliance. The Owner may conduct any inspection deemed necessary to verify compliance DELIVERY, STORAGE AND HANDLING A. Inspect all cathodic protection materials upon delivery to verify components are of the proper make, model and part number (as specified herein and on the

20 project drawings); are free of damage; and are provided in sufficient quantities to complete the project as designed. B. Store all cathodic protection materials in a dry, protected location to prevent impact, spark and weather related damage. PART 2 PRODUCTS 2.01 SACRIFICIAL ANODES: ALUMINUM PILING ANODES A. Anodes shall be aluminum type and shall conform to the following metallurgical composition: Element Indium (In) Zinc (Zn) Silicon (Si) Copper (Cu) Iron (Fe) Cadmium (Cd) Others Aluminum Percent Composition 0.02 percent (max.) 5.75 percent (max.) 0.12 percent (max.) percent (max.) 0.12 percent (max.) percent (max.) 0.02 percent (max. each) or 0.05 percent (max. total) Remainder B. Anodes shall be cast with a carbon steel rod core. Anode ingots shall be 35 pound Aluminum (ALOLINE 39RT or approved equal). PART 3 EXECUTION 3.01 PREPARATION A. Prior to commencing installation activities, the Contractor should review the Project Drawings and Specifications to become familiar with the scope of work and general location of the work to be performed. B. Field location of existing anode installations on H-piles located within bents 5-9 will be required. Installation of new sacrificial anodes shall be located on adjacent pile to existing installation within the same Bent row. Current installations, provided by best available information, indicate existing anode installations are located on every other H-pile within a Bent row.

21 C. All cathodic protection materials should be inspected for defect or damage prior to installation ALUMINUM ANODE INSTALLATION A. Anode positioning shall be located vertically on the H-pile at a height that allows for greatest amount of the sacrificial anode to be submerged while water level is at low tide. The bracket attachment points are allowed to be above water level during low tide. B. Refer to Project Drawings for bracket and anode assembly. Means and methods for any pre-assembly of the anode and bracket assembly are at the discretion of Contractor. C. Prepare the pile surface to receive anode bracket attachment by removing a sufficient amount of corrosion by-product from pile surface (approximately 3-inch by 3-inch for each connection point) and cleaning the exposed bare metal surfaces to bright metal. The weld attachment areas must be thoroughly cleaned and dry and to ensure a proper weld. D. Welds shall be visually inspected for proper workmanship. No further NDE inspection required CATHODIC PROTECTION SYSTEM TESTING & COMMISSIONING A. Verify with the Contractor and Project Representative that all cathodic protection system installation has been completed. As-builts of new and existing installation locations shall be provided to Project Representative after installation. B. Verify electrical continuity of installed components with dock structure. C. A full dock cathodic protection testing and commissioning survey to be completed by others. END OF SECTION

22 Please acknowledge receipt of this and all addendums in your firm s Construction Bid Form (Form (12/99). All other dates, terms and conditions remain unchanged. Please direct all responses and/or questions concerning this solicitation to C. Lee Thompson, Alaska Railroad Corporation, Contracts, 327 Ship Creek Avenue, Second Floor, Anchorage, AK 99501, telephone number , fax number or at address ThompsonL@akrr.com. Sincerely, C. Lee Thompson C. Lee Thompson Manager, Purchasing & Contracts Alaska Railroad Corporation