ITB 24-31TM Addendum 3 Attachment 2.pdf

31 62 19 Timber Piles - 1

SECTION 31 62 19

TIMBER PILES

PART 1 - GENERAL

1.1 SCOPE

A. The Work covered by this Section shall include the furnishing of all material and equipment and the performing of all labor to complete the timber pile work as shown on the Contract Drawings and as herein specified or directed by the Engineer.

B. This Work shall include but is not limited to:

1. Handling and driving new timber bearing piles for walkway.

1.2 RELATED SECTIONS

A. Timberwork

1.3 REFERENCES

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

B. American Society for Testing and Materials (ASTM)

ASTM D 25 (2022) Round Timber Piles

C. American Wood-Preserver’s Association (AWPA)

AWPA M4 (2021) Standard for the Handling, Storage, Field Fabrication and Field Treatment of Preservative Treated Wood Products

AWPA M6 (2018) Brands Used on Preservative Treated Wood Products AWPA P5 (2011) Waterborne Preservatives AWPA U1 (2022) Use Category System: User Specification for Treated

Wood

1.4 SUBMITTALS

A. Submit the following in accordance with the Contract requirements.

B. Certifications, test reports and other submittals shall show the appropriate ASTM or

AWPA standard(s) for each material.

C. Submit manufacturer’s data, test reports, certifications, and installation instructions for all materials, including but not limited to:

1. Wood Piles

2. Timber Preservative

D. Driving Equipment

1. Pile hammer

a. Make and model

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b. Hammer Type

c. Total weight

d. Total length

e. Power pack description

2. Pile centering guide/template

3. Leads

4. Special driving shoes or points

E. Pile Driving Records

F. Submit methods or procedures for the following:

1. Clearing obstructions during pile driving.

2. Pile extraction.

1.5 QUALITY ASSURANCE

A. The Contractor shall be fully experienced in all aspects of timber pile installation.

The firm shall be thoroughly experienced in similar installations under like subsurface conditions.

B. Before beginning work, the Contractor shall submit details of the pile he proposes to furnish, the pile driving equipment and a description of the proposed method of installation including pile splicing, all shall be subject to the approval of the Engineer.

1.6 SUBSURFACE INFORMATION

A. Logs of borings made on site are included in the appendix to these specifications and boring locations are shown on the Contract Drawings. The information shown on the boring logs is that available to the Engineer from the Owner for design and estimating purposes. The Contractor, at his own expense, may make additional investigations he considers justified.

PART 2 – PRODUCTS

2.1 PILES

A. Timber piles shall be Southern Yellow Pine and conform to ASTM D 25. Piles shall be in one piece. Splices will not be permitted. Each treated pile shall be branded by the producer, in accordance with AWPA M6.

B. Pile sizes shall be as indicated.

2.2 PRESERVATIVE TREATMENT

A. Timber piles shall be treated in accordance with AWPA U1 for the exposure condition and preservative retention indicated. Timber piles shall be treated using water-borne preservatives conforming to AWPA P5 for the type indicated. The Contractor shall be responsible for the quality of treated wood products.

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2.3 SOURCE QUALITY CONTROL

A. The Owner reserves the right to perform plant inspection of the treating process.

Provide the Owner with a minimum three (3) week advance notice, indicating location of the initial preservative treatment. Allow the Engineer unlimited access to the plant and inspection privileges for each facet of the treating process.

2.4 EQUIPMENT

A. Pile Driving Hammer

1. Furnish a hammer capable of installing the piles to the indicated bearing capacity considering the hammer energy; cross section, length, and total weight of pile;

and character of subsurface material to be encountered.

B. Approval of Pile Driving Equipment

1. All pile driving equipment furnished by the Contractor shall be subject to the approval of the Engineer. It is the intent of this Specification that all pile driving equipment be sized in such a way that the production piles can be driven with reasonable effort to the ordered lengths without damage.

C. Augers: Auger diameter shall not exceed six (6) inches.

PART 3 – EXECUTION

3.1 PILE INSTALLATION

A. Pre-auger to clear proposed pile location of debris or roots.

B. Inspect piles when delivered and when in the leads immediately before driving.

C. Protection of Piles: Square the heads and tips of piles to the driving axis. Handle, protect, and field treat piles in accordance with AWPA.

D. Driving Piles: Operate hammer at manufacturer's rated speed, and drive pile without interruption to the tip elevation or capacity shown on the Contract Drawings. If, in driving, it is found that a pile cannot be drive to the required tip elevation, the Contractor shall notify the Engineer, who will determine the corrective procedure to be followed.

E. Pre-augering: Pre-augering within five (5) feet of the specified tip elevation is permited.

F. If an obstruction is encountered during driving, the Contractor shall extract the pile and then determine the depth and lateral extent of the obstruction by probing. The Engineer shall then determine whether the obstruction should be removed, the pile offset, or additional piles driven.

G. At cutoff elevation, butts shall be within four (4) inches of the horizontal location shown on the Contract Drawings.

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H. Cut piles at cutoff elevation by sawing.

3.2 FIELD TREATMENT

A. Timberwork: Field treat cuts, bevels, notches, refacing and abrasions made in the field in treated piles or timbers in accordance with AWPA M4. Trim cuts and abrasions before field treatment.

B. Piling Protection: In accordance with AWPA M4, immediately after piles are cut off and prior to placement of pile cap protect pile or post top with several heavy applications of the same preservative used to treat the pile or post initially. The Contractor has the option to use copper naphthenate solutions containing a minimum of two (2) percent copper metal with treated products. Seal ends with a heavy application of coat-tar pitch or other appropriate sealer.

3.3 PILE DRIVING RECORDS

A. The Contractor shall employ the services of a third party inspector to monitor pile installation and keep all records as required below. The Owner may also have a representative observing the pile driving operations and keeping records as noted below. All direction as required by the pile driving operation shall be the sole responsibility of the Contractor. The Owner’s representative is only an observer.

B. The inspector shall keep a complete and accurate record of each pile driven.

Indicate the pile location, deviation from indicated location, cross section shape and dimensions, original length, ground elevation, tip elevation, cut-off elevation, total driving time, penetration rate for the final 10 feet of penetration, hammer data including rate of operation, make, and size, and all unusual pile behavior or circumstances experienced during driving such as redriving, heaving, weaving, obstructions, predrilling, and unanticipated interruptions. Make pile driving records available to the Engineer at the site within 24 hours of completion of pile driving.

Submit complete records of installed piles to Engineer within fifteen (15) calendar days after completion of the pile driving.

C. Provide actual tip elevations for the Pile Schedule on the As-Built Contract Drawings.

PART 4 – MEASUREMENT AND PAYMENT

4.1 BASIS OF PAYMENT

A. Payment for work described in this Section and shown on the Contract Drawings, including all labor, materials, services, and equipment necessary to complete the work to the satisfaction of the Owner, shall be compensated in accordance with Specification Section 01 27 00 Measurement and Payment.

END OF SECTION