ESBD_466902_1764179984954_Addendum1_2025-11-26.pdf

PROJECT: Aransas Pass Aquatic Center Boardwalk Replacement – CBBEP-2457-Issue2 https://www.txsmartbuy.gov/esbd/CBBEP-2457-Issue2

November 26, 2025

ADDENDUM 1

Item 1 Questions and Answers:

Question 1: I’m reviewing the project known as the Aransas Pass Aquatic Center Boardwalk Replacement and need to confirm the lumber requirements. Could you please provide the specified lumber treatment requirements as well as the required lumber grade for this project? Let me know if there are any additional documents or specifications I should reference.

Answer 1: Refer to drawing sheet G-1002, design criteria for material strength requirements and refer to specification for treatment and other requirements. Updated specification sections are included in Item 2 of this addendum.

Question 2: Please advise if construction/environmental permits, if required, have been acquired. If not, please advise when this may be anticipated.

Answer 2: Refer to General Provisions and Requirements of the bid document and General Requirements of General Notes (G-1002) for requirements regarding permits.

Question 3: We would like to review a geotechnical report. Please advise if this can be produced electronically for review.

Answer 3: The geotechnical report is included as Item 4 of this addendum (provided separately). It should be noted that the geotechnical report is for design purposes only and included for reference only. The limitations of its use are stated in the report.

Question 4: Section A-A shows Simpson H10A-2Z hangers which requires double stringers. Please advise only one (1) stringer is required which would require the use of a Simpson H10AZ hanger.

Answer 4: The Simpson H10A-2Z can be used for stinger spliced at bent. A Simpson H10A is acceptable for one stringer.

Question 5: Construction time commences at NTP, however construction commencement does not have to occur until 20 Days after NTP. Can we request that Construction Time commence on the date of mobilization as there is also a requirement to notify USEPA ten (10) working days prior to commencement of work which could be equivalent to 14 Calendar Days.

Answer 5: When providing construction schedule, all the anticipated waiting time should be considered.

Question 6: Matting was mentioned in the pre-bid. Is it expected to matt the entire access to the pier from the parking area?

Answer 6: Contractors should study the site to determine access and staging area and the requirements for ground preparation, including matting, suitable for equipment.

Question 7: What color Sure-Step Plus Series is required? Colors of Khaki, Gray, White, and Tan are options however lead times and availability differ, especially as relates to freight cost. Please advise of a color is possible to minimize total cost.

Answer 7: The decking may be of color range from light brown to dark brown or light gray to dark gray. Submit selected color for owner review.

Question 8: If the necessary impact force of driving piles can be met using a cable over hydraulic drop hammer on an excavator, will this method be acceptable as the specifications clearly indicate hammers only being operated by steam, air, or diesel?

Answer 8: The hammer specification is based on the anticipated impact energy required for the pile installation and meeting required installation safety and tolerances. The final selection of hammer and other installation methods is the responsibility of the contractor.

Question 9: There is no mention of the use of gun barrel piles, but drawings indicate a need to have an architectural straightness about it to allow straight railings. We want to verify gun barrel piles are not required. Please advise.

Answer 9: The alignment can be achieved by various construction methods, such as using template for pile driving. Refer to specifications regarding requirements of relative location of pile group or pile bent. Pile should be selected to meet requirements indicated in the contract documents and suitable for the construction means and methods.

Question 10: Sections show intermediate railings to have 7.5” spacing, however IBC code requires a maximum of 4” space on guardrails/railings for heights exceeding 30”. Please advise.

Answer 10: AASHTO pedestrian bridge railing requirements are considered more suitable for the structure location and traffic condition. The dimensions for the railing location is updated and included in Item 2 of this addendum.

Question 11: At the pre-bid meeting, it was mentioned this boardwalk shall meet ADA. The ADA ramp does not indicate any line rail typical of a design for an ADA ramp. Please advise if handicap railing is required.

Answer 11: The ADA railing is required for the ramp. The requirements for the railing location is shown in the updated railing location that is included in Item 2 of this addendum.

Question 12: Is there any specific areas that have been discussed internally for a laydown area for materials that should be considered?

Answer 12: No. The laydown area should be proposed by the contractor. Bidders are encouraged to conduct site visits before submitting proposals.

Question 13: Due to deviation and tolerances in pile driving, there is concern that the railings would not be architecturally straight with the with the deviation in piles. In addition, typically the

2.5 treatment is not used above deck for human exposure. An alternative design with the piles to be cut below deck in between the bents with dimensional vertical posts used as railing supports would allow for a more uniform and straight railing appearance. In addition, this would provide a cost savings, and similar design could be applied to gazebo pile supports. If the sure-step decking option is selected, it would also prevent the potential issues the 6’ width of this product creates as relates to the variation in pile tolerances, not to mention the 1/16” expansion that occurs at every 25 degree variance in temperature. Please advise if this is an option.

Answer 13: The alignment can be achieved by various construction methods, such as using template for pile driving. Refer to specifications regarding requirements of relative location of pile group or pile bent. Refer to specifications for the treatment requirements. Railing framing alternatives, including cutting piles below deck and using dimensional vertical posts, are acceptable. Contractor should submit any alternative design of the railing system to meet lateral and vertical loading requirements during shop drawing submittal phase. The determination of actual pile installation tolerances should always consider the deck installation requirements. The contractor should consider anticipated means and methods anticipated in the proposal.

Question 14: The specifications indicate requirements for testing without specifically stating what is to be tested. What testing is required by contractor?

Answer 14: Clarification of the test referred to in the question is needed for us to provide answer.

Question 15: The pre-bid agenda indicated that bids could be submitted via email, however the bid documents do not state this. Please advise if bids can be emailed, and if so; what email address shall bids be addressed?

Answer 15: The “NOTICE TO BIDDERS” (page 4 of the PDF) of the bid documents provides this information.

Question 16: With many of the questions asked, if answers are not provided until 5pm on Dec.

3rd, a worst case scenario bid is most likely to be provided the following due to not having ample time to source all costs based on responses. Please consider addressing responses with a few additional days to allow for appropriate bid response.

Answer 16: Addenda for answers to questions and updates will be posted in phases. Any change of bid submission date, if applicable, will also be posted on the bid site.

Question 17: Since bidder questions are due three days prior to the bid opening, could the bid date be extended to allow sufficient time for the contractor to incorporate any necessary changes based on the responses?

Answer 17: Refer to Answer 16.

Question 18: Due to pile driving tolerances, railings may not appear straight. Since 2.5 treatment is not typically used above deck, we propose cutting piles below deck and using vertical posts for railing support. Please confirm if this design is acceptable.

Answer 18: Refer to Answer 13.

Question 19: On page 92, sheet 1005, the handrail detail indicates 2 bolts at each rail connection.

However, detail 6 on page 94, sheet 1007 references only 1 bolt per pile. Could you clarify which requirement should be followed?

Answer 19: One bolt each shown in the details is correct.

Question 20: The specifications list piles as Class B 12” (natural taper). However, Section 31 62

19.13 (pg. 7) requires piles to be uniform in size at the pile caps, and since the piles are also at handrail height, achieving uniformity with natural taper piles may be difficult. Please clarify if gun barrel piles are required?

Answer 20: Section 31 62 19.13 (pg. 7) requires piles to be same size for each bent, does not mean the diameter of one pile to be the same at bottom and top. Gun barrel piles are optional based on installation requirements. Select piles that meet requirements indicated in the contract documents and are suitable for the installation.

Question 21: The drawings do not show an overhead detail for the stringer splice block requirement. Could you clarify whether blocking will be required on the outside stringers, or if they are intended to be attached directly to the pile?

Answer 21: Refer to the “Framing and Piling Plans” and specification “Pier Timberwork” for splicing and blocking requirements. Splicing is means and method of specific contractor. Shop drawings shall be submitted in accordance with requirements of specifications during construction.

Question 22: Intermediate railings are shown with 7.5” spacing, but IBC code limits spacing to 4” for guardrails above 30” in height. Please clarify.

Answer 22: Refer to Answer 10.

Question 23: Can a geotechnical report be made available electronically for review?

Answer 23: Refer to Answer 3.

Question 24: What pilings are to be quoted: 1) 12" gun barrel 2) 12"taper 3) 12"taper class B Answer 24: Refer to Answer 9 and Answer 20.

Question 25: Treated lumber: Is lumber grade #1 or structural select Answer 25: Refer to G-1002 General Notes, Design Criteria.

Item 2 Railing Location Dimensions

Item 3 Updated Specifications

Sections 06 13 33 and 31 62 19.13 in the bid documents are replaced with the following ones.

Aransas Pass Aquatic Center Boardwalk Replacement

PROJECT TABLE OF CONTENTS

DI VI SI ON 01 - GENERAL REQUI REMENTS

01 33 00 SUBMITTAL PROCEDURES

DI VI SI ON 02 - EXI STI NG CONDI TI ONS

02 41 00 DEMOLITION

DI VI SI ON 06 - WOOD, PLASTI CS, AND COMPOSI TES

06 13 33 PIER TIMBERWORK

DI VI SI ON 07 - THERMAL AND MOI STURE PROTECTI ON

07 61 14.00 20 STEEL STANDING SEAM ROOFING

DI VI SI ON 31 - EARTHWORK

31 62 19.13 TIMBER MARINE PILES

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1 bzhang Typewritten Text ------- Updated in Addendum 1 bzhang Typewritten Text ------- Updated in Addendum 1

SECTION 06 13 33

PIER TIMBERWORK

PART 1 GENERAL

1.1 REFERENCES

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

AMERICAN WOOD PROTECTION ASSOCIATION (AWPA)

AWPA M4 (2015) Standard for the Care of Preservative-Treated Wood Products

AWPA M6 (2013) Brands Used on Preservative Treated Materials

AWPA P34 (2014) Standard for Copper Naphthenate, Waterbone (CuN-W)

AWPA T1 (2017) Use Category System: Processing and Treatment Standard

AWPA U1 (2017) Use Category System: User Specification for Treated Wood

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A307 (2014; E 2017) Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

ASTM D5643/D5643M (2012) Standard Specification for Coal Tar Roof Cement, Asbestos Free

U.S. DEPARTMENT OF DEFENSE (DOD)

MIL-P-21035 (1991; Rev B; Notice 2 2003) Paint, High Zinc Dust Content, Galvanizing Repair (Metric)

WESTERN WOOD PRESERVERS INSTITUTE (WWPI)

WWPI Mgt Practices (1996; R 2011) Best Management Practices for the Use of Treated Wood in Aquatic and Wetland Environments

SECTION 06 13 33 Page 1

1.2 SUBMITTALS

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Pier Timberwork;

Submit drawings of treated timber showing dimensions of cut, framed, or bored timbers.

SD-06 Test Reports

Preservative Treatment - Pier Timberworks;

The Contractor must provide the Owner's Representative with the inspection report of an independent inspection agency, approved by the Owner, that offered products comply with applicable AWPA standards.

Delivery Inspection List;

SD-07 Certificates

SDS and CIS;

Pesticide Applicator Company Self-Certification;

Best Management Practices (BMPs);

1.3 DELIVERY, STORAGE, AND HANDLING

Handle and store piles in accordance with AWPA M4. Follow precautions identified in SDS and CIS provided by the supplier of treated wood products.

Open-stack untreated timber and lumber material on skids at least 12 inches above ground, in a manner that will prevent warping and allow shedding of water. Close-stack treated timber and lumber material in a manner that will prevent long timbers or preframed material from sagging or becoming crooked. Keep ground under and within 5 feet of such piles free of weeds, rubbish, and combustible materials. Protect materials from weather.

Handle treated timber with ropes or chain slings without dropping, breaking outer fibers, bruising, or penetrating surface with tools. Do not use cant dogs, peaveys, hooks, or pike poles. Protect timber and hardware from damage.

1.4 QUALITY ASSURANCE

1.4.1 Preservative Treatment - Pier Timberworks

The Contractor must be responsible for the quality of treated wood products. The Contractor must provide the Owner's Representative (COR) with the inspection report of an independent inspection agency, approved by the Owner, certifying that the offered products comply with applicable AWPA standards. Identify treatment on each piece by the quality mark of an agency accredited by the Board of Review of the American Lumber

SECTION 06 13 33 Page 2

Standard Committee. Inspect all preservative-treated wood visually to ensure there are no excessive residual materials or preservative deposits. Material must be clean and dry or it will be rejected because of environmental concerns.

1.4.2 SDS and CIS

Provide Safety Data Sheets (SDS) and Consumer Information Sheets (CIS) associated with timber pile preservative treatment. Contractor must comply with all safety precautions indicated on SDS and CIS.

1.4.3 Delivery Inspection List

Field inspect and submit a verification list of each treated timber member and each strapped bundle of treated lumber indicating the wording and lettering of the quality control markings, the species and the condition of the wood. Do not incorporate materials damaged in transport from plant to site. Inspect all preservative-treated wood, visually to ensure there are no excessive residual materials or preservative deposits. Material must be clean and dry or it will be rejected due to environmental concerns.

1.4.4 Pesticide Applicator Company Self-Certification

Provide the Owner, a statement signed by the responsible site supervisor or higher company representative, certifying that the contractor will comply with all pesticide label instructions. The certification should identify by name all individuals (applicators) who will be working with wood preserving pesticide products on site.

1.4.5 Best Management Practices (BMPs)

The producer of the treated wood products must provide certification that WWPI Mgt Practices for the use of Treated Wood in Aquatic and Wetland Environments were utilized including a written description and appropriate documentation of the BMPs utilized.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Lumber and Timbers

Provide solid sawn lumber and timbers of stress-rated Southern Pine, Douglas Fir-Larch, or Red Pine with a stress rating as indicated, and identified by the grade mark of a recognized association or independent inspection agency using the specific grading requirements of an association recognized as covering the species used. The association or independent inspection agency must be certified by the Board of Review, American Lumber Standards Committee, to grade the species used. For secondary members use lumber or timbers rated No. 1 or better. Use commercial grade lumber for decking members.

2.1.2 Preservative Treatment

Fabricate lumber and timbers before preservative treatment. Each piece of treated lumber or timber must be branded, by the producer, in accordance with AWPA M6. The type of preservative, retention, and penetration must be based on Use Category and species and in accordance with AWPA U1 and AWPA T1. The Contractor must be responsible for the quality of treated

SECTION 06 13 33 Page 3 wood products.

For wood in contact with brackish water, salt water, or saltwater splash, lumber and timber preservative treatment must be AWPA Use Category: UC5C.

For wood not in contact with brackish water, salt water, or salt water splash, treatment must be AWPA Use Category: UC4C.

2.1.3 Field Treatment

Piles must be field treated in accordance with AWPA M4. All cuts, holes and injuries such as holes from removal of spikes or nails which may penetrate the treated zone must be field treated with copper naphthenate conforming to AWPA P34 .

2.1.4 Hardware

Pile hardware must consisting of bolts with necessary nuts and washers, timber connectors, drift pins, dowels, nails, screws, spikes, and other fastenings. Bolts and nuts must conform to ASTM A307. Provide cast-iron ogee, malleable iron washers, or plate or cut washers where indicated.

Provide bolts with washers under nut and head. Provide timber connectors and other metal fastenings of type and size indicated. Hot-dip galvanize all hardware specified or indicated in accordance with ASTM A123/A123M or ASTM A153/A153M , as applicable.

PART 3 EXECUTION

3.1 INSTALLATION

Cut, bevel, and face timbers prior to plant preservative treatment. In addition to the contract clause entitled "Accident Prevention" provide protective equipment for personnel fabricating, field treating, or handling materials treated with creosote or water-borne salts. Refer to paragraph SDS AND CIS.

3.1.1 Framing

Cut and frame lumber and timber so that joints will fit over contact surface. Secure timbers and piles in alignment. Open joints are unacceptable. Shimming is not allowed. Drill holes for drift pins and dowels with a bit 1/16 inch less in diameter than the pin or dowel. Drill holes for truss rods or bolts with a bit 1/16 inch larger in diameter than rod or bolt. Drill holes for lag screws in two parts. Make lead hole for shank the same diameter as shank. Make lead hole for the threaded portion approximately two-thirds of the shank diameter. Drill holes in small timbers for boat or wire spikes with a bit of the same diameter or smallest dimension of the spike to prevent splitting. Counterbore for countersinking wherever smooth faces are indicated or specified.

3.1.2 Caps

Prior to placing caps, treat tops of posts or piles with copper naphthenate per AWPA M4.

3.1.3 Stringers

Place crown up and, if possible, the better edge of deck stringers down.

Tops of stringers must not vary from a plane more than will permit bearing

SECTION 06 13 33 Page 4 of the floor on stringers. Butt-joint and splice outside stringers, but lap interior stringers to take bearing over full width of cap or floor beam at each end. Break joints if stringers cover two spans. Toenail or drift bolt stringers as indicated. Stringers may be of sufficient length to cover two spans, except on sharp horizontal curves. Between stringers, frame and toenail cross-bridging or solid-bridging at each end with at least two nails for cross-bridging and four nails for solid-bridging.

Make size and spacing of bridging as indicated.

3.1.4 Decking

Install decking panel in accordance with manufacturer's written instruction.

3.1.5 Fastening

Vertical bolts must have nuts on the lower end. Where bolts are used to fasten timber to timber, timber to concrete, or timber to steel, bolt members together when they are installed and retighten immediately prior to final acceptance of contract. Provide bolts having sufficient additional threading to provide at least 3/8 inch per foot thickness of timber for future retightening. Provide timber connectors of types indicated. Install split-ring and shear-plate connectors in pre-cut grooves of the dimensions as recommended by the manufacturer. Force toothed-ring and spike-grid connectors and clamping plates into the contact surfaces of timbers joined by means of proper pressure tools; at joints, embed connectors of these types simultaneously and uniformly.

3.2 FIELD TREATMENT

3.2.1 Pier timberwork

Field treat all cuts, holes, bevels, notches, refacing, abrasions, and injuries such as abrasions or holes from removal of spikes or nails made in the field in treated piles or timbers in accordance with AWPA M4, SDS and CIS. Trim cuts and abrasions before field treatment. Depressions or openings around bolt holes, joints, or gaps including recesses formed by counterboring must be field treated with copper naphthenate conforming to AWPA P34; and after bolt or screw is in place, fill with coal-tar roofing cement conforming to ASTM D5643/D5643M .

3.2.2 Piling and Post Protection

After driving is completed, all piles must be "headed" or cut off normal at the cutoff elevation. Headed treated piles, including those to be capped with concrete, must be treated with copper naphthenate per AWPA M4.

Piles driven in locations where they are constantly subject to water spray must be given this treatment immediately after they are cut off and before the cutoff surface has been wetted. Seal ends with a heavy application of coal-tar pitch or other appropriate sealer.

Cutoffs must become the property of the Contractor and must be removed at his expense.

3.2.3 Galvanized Surfaces

Repair and recoat zinc coating which has been field or shop cut, burned by

SECTION 06 13 33 Page 5 welding, abraded, or otherwise damaged to such an extent as to expose the base metal. Thoroughly clean the damaged area by wire brushing and remove traces of welding flux and loose or cracked zinc coating prior to painting. Paint cleaned area with two coats of zinc oxide-zinc dust paint conforming to MIL-P-21035 . Compound paint with a suitable vehicle in a ratio of one part zinc oxide to four parts zinc dust by weight.

-- End of Section --

SECTION 06 13 33 Page 6

SECTION 31 62 19.13

TIMBER MARINE PILES

PART 1 GENERAL

1.1 REFERENCES

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

AMERICAN WOOD PROTECTION ASSOCIATION (AWPA)

AWPA M2 (2016) Standard for the Inspection of Preservative Treated Wood Products for Industrial Use

AWPA M4 (2015) Standard for the Care of Preservative-Treated Wood Products

AWPA M6 (2013) Brands Used on Preservative Treated Materials

AWPA P34 (2014) Standard for Copper Naphthenate, Waterbone (CuN-W)

AWPA T1 (2017) Use Category System: Processing and Treatment Standard

AWPA U1 (2017) Use Category System: User Specification for Treated Wood

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A307 (2014; E 2017) Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

ASTM D25 (2012; R 2017) Standard Specification for Round Timber Piles

WESTERN WOOD PRESERVERS INSTITUTE (WWPI)

WWPI Mgt Practices (1996; R 2011) Best Management Practices for the Use of Treated Wood in Aquatic and Wetland Environments

SECTION 31 62 19.13 Page 1

1.2 SUBMITTALS

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-03 Product Data

Piles;

Pile Driving Equipment;

Submit complete descriptions of pile driving equipment, including hammers, leads, driving helmets, cushion blocks, driving blocks, collars, extractors, and other appurtenances for approval prior to commencement of work.

Pile Caps;

SD-06 Test Reports

Preservative Treatment - Timber Marine Piles;

The Contractor must provide the Owner's Representative with the inspection report of an independent inspection agency, approved by the Owner, that offered products comply with applicable AWPA standards.

Delivery Inspection List;

SD-07 Certificates

SDS and CIS;

Pesticide Applicator Company Self-Certification;

Best Management Practices (BMPs);

SD-11 Closeout Submittals

Pile Driving Records;

Submit pile driving records within 15 calendar days after completion of driving.

As-Driven Pile Survey;

1.3 DELIVERY, STORAGE, AND HANDLING

Handle and store piles in accordance with AWPA M4. Follow precautions identified in SDS or CIS provided by the supplier of treated wood products. Special care must be taken in supporting piles to prevent the induction of excessive bending stresses in the piles. Piles must be carefully handled without dropping, breaking of outer fibers, and penetrating the surface with tools. Peaveys, cant hooks, pikes, and other pointed tools must not be used in handling treated piles.

SECTION 31 62 19.13 Page 2

1.4 QUALITY ASSURANCE

1.4.1 Preservative Treatment - Timber Marine Piles

The Contractor must be responsible for the quality of treated wood products. The Contractor must provide the Owner's Representative with the inspection report of an independent inspection agency, approved by the Owner, certifying that the offered products comply with applicable AWPA standards. Identify treatment on each piece by the quality mark of an agency accredited by the Board of Review of the American Lumber Standard Committee. Inspect all preservative-treated wood visually to ensure there are no excessive residual materials or preservative deposits. Material must be clean and dry or it will be rejected because of environmental concerns.

1.4.2 SDS and CIS

Provide Safety Data Sheets (SDS) and Consumer Information Sheets (CIS) associated with timber pile preservative treatment. Contractor must comply with all safety precautions indicated on the SDS and CIS.

1.4.3 Delivery Inspection List

Field inspect and submit a verification list of each treated timber pile indicating the wording and lettering of the quality control markings, the species and the condition of the wood. Do not incorporate piles damaged in transport from plant to site. Inspect all preservative-treated piles, visually to ensure there are no excessive residual materials or preservative deposits. Material must be clean and dry or it will be rejected due to environmental concerns.

1.4.4 Pesticide Applicator Company Self-Certification

Provide the Owner, a statement signed by the responsible site supervisor or higher company representative, certifying that the contractor will comply with all pesticide label instructions. The certification should identify by name all individuals (applicators) who will be working with wood preserving pesticide products on site.

1.4.5 Best Management Practices (BMPs)

The producer of the treated wood products must provide certification that WWPI Mgt Practices for the use of Treated Wood in Aquatic and Wetland Environments were utilized including a written description and appropriate documentation of the BMPs utilized.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Piles

Provide Douglas fir, or Southern pine , treated piles in accordance with AWPA U1 Commodity Specification G and conforming to ASTM D25 and other requirements as specified. Piles must be in one piece for the length shown . Splices will not be permitted. Each treated pile must be branded by the producer, in accordance with AWPA M6. Pile dimensions must be as

SECTION 31 62 19.13 Page 3 follows:

a. Bearing Piles: Minimum butt dimension measured at 3 feet from the butt end must be as indicated.

2.1.2 Preservative Treatment

Treat piles based on Use Category and species in accordance with AWPA U1 and AWPA T1 to the retention and penetration for marine piling and produce in accordance with WWPI Mgt Practices . Piles preservative treatment must be AWPA Use Category: UC4C.

2.1.3 Field Treatment

Piles must be field treated in accordance with AWPA M4. All cuts, holes and injuries such as holes from removal of spikes or nails which may penetrate the treated zone must be field treated with copper naphthenate conforming to AWPA P34 .

2.1.4 Pile Caps

Marine pile caps must consist of a permanently fixed coating of epoxy .

2.1.5 Hardware

Pile hardware must consisting of bolts with necessary nuts and washers, timber connectors, drift pins, dowels, nails, screws, spikes, and other fastenings. Provide bolts with washers under nut and head. Bolts and nuts must conform to ASTM A307. Provide cast-iron ogee, malleable iron washers, or plate or cut washers where indicated. Provide bolts with washers under nut and head. Provide timber connectors and other metal fastenings of type and size indicated. Hot-dip galvanize all hardware in accordance with ASTM A123/A123M or ASTM A153/A153M , as applicable.

2.2 TESTS, INSPECTIONS, AND VERIFICATIONS

2.2.1 Inspection of Piles

The Contractor must provide the necessary facilities for the proper inspection of each pile. Piles to be preservative treated will be inspected prior to treatment. Piles will be inspected at the shipping point or at the work site if so decided. Pile inspection at the shipping point will not be performed for less than 100 piles in one locality.

Piles with specified variations in characteristics must be placed in separate lots for inspection. Piles must be so marked or segregated into marked lots that there will be no possibility of error in assignment after they have been inspected. Piles damaged after inspection may be subsequently rejected if damage is deemed sufficient for rejection. All rejected piles must be removed as directed.

2.2.2 Inspection of the Preservative Treatment Process

Inspection of the preservative treatment process will be in accordance with AWPA M2. The Contractor must notify the Owner where preservative treatment will be done not less than 15 days prior to the start of the treatment and must provide the necessary facilities for the proper inspection of the treatment process. Allow the Owner unlimited access to the plant and inspection privileges for each facet of the treating process.

SECTION 31 62 19.13 Page 4

PART 3 EXECUTION

3.1 INSTALLATION

3.1.1 Pile Driving Equipment

Pile driving equipment must meet the following requirements.

3.1.1.1 Pile Driving Hammers

Pile driving hammers must be steam, air or diesel, single-action, double-acting, differential-acting type. The size or capacity of hammers must be as recommended by the manufacturer for the pile weights and solid formation to be penetrated. The pile hammer must be of sufficient weight and energy to install the specified pile without damage into the soils expected to be encountered. The maximum driving energy of hammers must be 15,000 foot-pounds for piles for any length. Test piles must be driven with the same size and type hammer, operating with the same effective energy and efficiency as that to be used in driving job piles.

Diesel powered hammers must be operated at the rate recommended by the manufacturer throughout the entire driving period. Sufficient pressure must be maintained at the hammer so that:

a. For double-acting hammers, the number of blows per minute during and at the completion of driving of a pile is equal approximately to that at which the hammer is rated;

b. For single-acting hammers, there is a full upward stroke of the ram;

and,

c. For differential-type hammers, there is a slight rise of the hammer base during each upward stroke.

3.1.1.2 Leads

Leads are required and must be fixed at the top and adjustable at the bottom. Swinging leads will be permitted.

3.1.1.3 Driving Cap or Helmet and Cushion Block

Driving cap or helmet must be an approved design and must be capable of protecting pile heads, minimizing energy absorption, and transmitting hammer energy uniformly and consistently to piles. Place driving helmet or cap and cushion block combination between top of pile and the ram.

Driving cap must fit snugly on the top of piles and must employ a cushion block to prevent impact damage to piles. The cushion block may be a solid or laminated softwood block with the grain parallel to the pile axis and enclosed in a close-fitting steel housing. The thickness of the block must be suitable for the length of pile to be driven and the character of subsurface material to be encountered. If block is damaged, split, highly compressed, charred or burned, or has become spongy or deteriorated, replace with new block. Under no circumstances will the use of small wood blocks, wood chips, rope, or other material permitting excessive loss of hammer energy be permitted.

3.1.1.4 Pile Collars

Collars or bands for protecting pile butts against splitting, brooming, and other damage while being driven must be of an approved design.

SECTION 31 62 19.13 Page 5

3.1.2 Pile Installation

Inspect piles when delivered and when in the leads immediately before driving. Cut piles at cutoff grade with pneumatic tools by sawing or other approved method. Where cutoff is below existing mudline elevation, complete excavation, sheeting and dewatering before pile is driven to cutoff elevation.

3.1.2.1 Driving Piles

Piles must not be driven within 100 feet of concrete which is less than 7 days old unless otherwise authorized. A complete and accurate record of the driving of piles must be compiled by the Contractor for submission to the Owner. When driving long piles of high slenderness ratio, special precautions must be taken to ensure against overstressing and leading away from a plumb or true position. During driving, pile driving hammers must be operated at all times at the rate and conditions recommended by the hammer manufacturer. Each pile must be driven continuously and without interruption to the indicated tip elevation . Deviation from this procedure will be permitted only in case the driving is stopped by causes which reasonably could not have been anticipated. Piles must be driven to the full penetration required where practicable to do so without damage to the piles. If found impracticable to drive any pile to the depth required, such pile must be cut off and abandoned or pulled as directed.

Driving of piles beyond the point of refusal, as indicated by excessive bonding of the hammer or kicking of the pile, or a blow count of greater than twice the blow count required to produce the safe bearing capacity must not be attempted. Piles which have uplifted after driving must be redriven to grade after conclusion of driving in that general area. The use of followers or splices must not be permitted. After driving is completed, all piles must be "headed" or cut off normal at the cutoff elevation. Pile heads at cutoff must be sound. Headed treated piles, including those to be capped with concrete, must be treated with copper naphthenate per AWPA M4. Piles driven in locations where they are constantly subject to water spray must be given this treatment immediately after they are cut off and before the cutoff surface has been wetted.

Cutoffs must become the property of the Contractor and must be removed at his expense.

3.1.2.2 Tolerances in Driving Piles

Piles must be accurately placed in the correct location and alignments both laterally and longitudinally and to the vertical or batter lines as shown. At cutoff elevation, butts must be within(2 inches) laterally of the location indicated. Manipulation of piles is prohibited. A variation of not more than 0.25 inch per foot of pile length from the vertical for plumb piles or more than 0.50 inch per foot of pile length from the required angle for batter piles will be permitted. The correct relative position of group piles must be maintained by the use of templates or by other approved means. Inspect piles for heave. Piles must be driven to the depths shown . Redrive heaved piles to the required tip elevation. Remove and replace with new piles those damaged, misplaced, driven below the design cutoff, or driven out of alignment, or provide additional piles, driven as directed at no additional cost to the Owner.

3.1.2.3 Pile Driving Records

Keep a complete and accurate driving record of each pile driven. Indicate

SECTION 31 62 19.13 Page 6 pile location, deviations from design location, diameter, original length, mudline elevation, tip elevation, cutoff elevation, penetration in blows per meter foot for entire length of penetration for test piles, penetration in blows per meter foot for the last 10 feet for job piles, hammer data including rate of operation, make, and size, and unusual pile behavior or circumstances experienced during driving such as redriving, heaving, weaving, obstructions, and unanticipated interruptions.

Preprinted forms for recording pile driving data are attached at the end of this section. Make pile driving records available to the Owner at the job site, a minimum of 24 hours after each day of pile driving. Include in the construction records the wood species, preservative type, retention, and producer of installed treated timber.

3.1.2.4 Survey Data

After the driving of each pile group is complete and before superimposed concrete is placed, provide the Owner with an As-Driven Pile Survey showing actual location and top elevation of each pile. The Contractor must not proceed with placing concrete until the Owner has reviewed the survey and verified the safe load for the pile group driven. A survey must be presented in such form that it gives deviation from plan location in two perpendicular directions and elevations of each pile to nearest half inch. Survey must be prepared and certified by a licensed land surveyor .

3.1.3 Framing Treated Piles

Treated piles must not be cut to permit fitting of timbers. Piles of uniform size must be selected for each bent. If necessary, treated filler blocks must be used to fill out between piles and bracing. Holes for drift bolts in the tops of piles must be drilled to a depth of 3 inches less than the penetration of drift bolts in the piles. Drill holes for drift bolts 1/8 inch smaller than bolt diameter. Drill holes for through bolts 1/16 inch larger than diameter of bolt shank. Drill holes for lag screws in two parts. Make lead hole for shank the same diameter as shank. Make lead hole for the threaded portion approximately two-thirds of the shank diameter. Counterbore holes for bolt heads and washers as indicated. Holes drilled into piles must be treated with copper naphthenate and sealed with coal-tar roofing cement in accordance with paragraph ON SITE APPLICATION OF WOOD PRESERVATIVES and when not used for bolts must be tightly closed by a treated plug. Holes must not be drilled or spikes must not be driven into piles to support scaffolding.

3.1.4 Fastening

Where bolts are used to fasten timber to timber, timber to concrete, or timber to steel, bolt members together when they are installed and retighten immediately prior to final acceptance of contract. Provide bolts having sufficient additional threading to provide at least 3/8 inch per foot thickness of timber for future retightening. Provide timber connectors of types indicated. Install split-ring and shear-plate connectors in pre-cut grooves of the dimensions as recommended by the manufacturer. Force toothed-ring and spike-grid connectors and clamping plates into the contact surfaces of timbers joined by means of proper pressure tools; at joints, embed connectors of these types simultaneously and uniformly.

SECTION 31 62 19.13 Page 7

3.2 PROTECTION

3.2.1 Protection of Piles

Square the heads and tips of piles to the driving axis. Laterally support piles during driving, but do not unduly restrain piles from rotation in the leads. Where pile orientation is essential, take precautionary measures to maintain the orientation during driving. Handle, protect, and field treat piles in accordance with AWPA M4.

3.2.1.1 Damaged Piles

Driving of piles must not subject them to damage. Piles which are damaged, split, broomed, or broken by reason of internal defects or by improper driving below cutoff elevation so as to impair them for the purpose intended must be removed and replaced; a second pile may be driven adjacent thereto at the Contractor's expense. Minor damaged areas of treated piles must be field treated in accordance with AWPA M4.

3.2.1.2 On Site Application of Wood Preservatives

All on site application of wood preservatives must be performed by the person identified in accordance with paragraph PESTICIDE APPLICATOR COMPANY SELF-CERTIFICATION. Field application of wood preservatives must be made in accordance with the pesticide label. All cuts, holes and injuries such as holes from removal of spikes or nails which may penetrate the treated zone must be field treated in accordance with AWPA M4.

3.3 FIELD QUALITY CONTROL

3.3.1 Inspections

When Owner inspections result in product rejection, the Contractor must promptly segregate and remove rejected material from the premises. The Owner may also charge the Contractor an additional cost of inspection or test when prior rejection makes reinspection or retest necessary.

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SECTION 31 62 19.13 Page 8

Item 4 Geotechnical Report

The geotechnical report is provided separately for reference only. For use limitations, refer to the relevant paragraphs in the report.