SECTION 02361

WOOD FRICTION PILES

PART 1 GENERAL

SECTION INCLUDES

[Preservative treated] wood piles [with steel tip][.] [and collar.]

RELATED WORK

Section [_____] - Information Available to Bidders: Subsurface Investigation Report.

Section [01400 - Quality Control] [01410 - Testing Laboratory Services]: Testing laboratory services.

Section 02222 - Excavation: Excavation to working level.

Section 02356 - Pile Load Tests: Requirements for pile load tests.

Section [_____-__________]: Pile caps[.] [and grade beams.]

REFERENCES

ASTM D25 - Round Timber Piles.

ASTM D245 - Method For Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber.

ASTM D1760 - Pressure Treatment of Timber Products.

AWPA C3 - Preservative Treatment of Piles by Pressure

Process.

AWPA M4 - Standard for the Care of Pressure Treated Wood Products.

UNIT PRICES

Design Pile Quantity: Determined by quantity of piles indicated in the Contract Documents.

Design Pile Length: Based on the length from point to cut-off elevation [of [___] ft ([___] m).] [as indicated.] Test Piles: [5] [___] ft ([1.5] [___] m) longer than design length piles.

Contract Pile Quantity: Determined by quantity of piles identified in the Project Record Documents.

Actual Pile Length: Determined by length of piles identified in Project Record Documents.

Adjustments in Contract Price will be made due to changes in number and length of piles, based on unit prices established in the Agreement as follows:

Contract Pile Quantity, and [_______________.]

Contract unit price per unit length including test piles, multiplied by the Actual Pile Length. Base measurement on total linear measurement of piling from point to cut-off elevation, except for test piles calculated at [5] [___] ft ([1.5] [___] m) longer.

Determination of Unit Measurements: [Identified by site measurements and verified by the Architect/Engineer.] [_______________.]

PERFORMANCE REQUIREMENTS

Drive piles to refusal of not less than [___] blows to achieve [___] inches of additional depth.

****** [OR] ******

Drive piles to [defined load supporting capacity.] [load supporting capacity of [___] lb ([___] kg).] [__________.]

Avoid damaging piles by over driving.

SUBMITTALS

Submit under provisions of Section [01300.] [_____.]

Shop Drawings: Indicate details and schedule of pile installation sequence. Identify [recommended] pile length and diameter to suit design requirements.

Product Data: Provide details of collars, tips, splices, [and][.] [_______________.]

Submit evidence of preservative treatment certification.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [_____.]

Accurately record the following:

Sizes, lengths, and locations of piles.

Sequence of driving.

Number of blows per foot (meter) for entire length of piles and measured set for last [10] [___] blows.

Drilling: Hole diameters, start and tip elevations.

Final tip and head elevations.

Driving force of each hammer blow.

QUALIFICATIONS

Installer: Company specializing in performing the Work of this Section with minimum [___] years [documented] experience.

Design and select pile components under direct supervision of a Professional Structural Engineer experienced in design of this Work and licensed [at the place where the Project is located.] [in the State of [_______________].]

REGULATORY REQUIREMENTS

Conform to [applicable] [__________] code for seismic requirements for piling.

Provide certificate of compliance from [authority having jurisdiction] [_______________] indicating approval.

PRE-INSTALLATION CONFERENCE

Convene [one] [___] week prior to commencing work of this Section, under provisions of Section [01039.] [_____.]

FIELD MEASUREMENTS

Verify that field measurements and survey benchmarks are as indicated on Drawings.

SCHEDULING

Schedule Work under the provisions of Section [01300.] [_____.]

Schedule Work to perform driving during [___] and [___] hours.

Schedule [test] [indicator] piles.

PART 2 PRODUCTS

MATERIALS

Piles: [ASTM D25,] [Douglas Fir] [Southern Pine] [__________], [clean peeled] [rough peeled] [unpeeled], [one piece, non-spliced], friction type, preservative treated pressure impregnated [with creosote in accordance with AWPA C3 for land and fresh water piles] [with [__________] type preservative treatment] with minimum retention of [___] lb/cu ft ([___] kg/cu m).

Dimensions: Minimum [butt] [tip] [diameter] [circumference] [of [___] inches ([___] mm).] [as indicated.] [[___] ft ([___] m) long.] [Splices will not be permitted.] [Splices permitted only below elevation [_____].]

Pile Tip: [Formed and welded steel.] [_______________.]

Pile Collar: [Formed and welded steel.] [_______________.]

SOURCE QUALITY CONTROL

Provide shop [testing and] inspection of wood piles under provisions of Section [01400.] [01410.] [_____.]

Test sample piles in accordance with [ASTM D245] [and][.] [ASTM D1760.]

PART 3 EXECUTION

EXAMINATION

Verify site conditions under provisions of Section [01039.] [_____.]

Verify that site conditions will support equipment for performing pile driving operations[.] [and testing.]

PREPARATION

[Obtain prior approval of hammer type to be used.]

Use driving method which will not cause damage to nearby structures.

Notify adjacent and affected land owners and building occupants [with [_____] days] notice before proceeding with the Work.

Protect structures near the Work from damage.

DRILLING

Drill holes to facilitate driving only if piling cannot be completed in specified manner. Drill only through strata obstructing driving.

Hole Diameter: Maximum [1] [___] inch ([25] [___] mm) [larger] [smaller] than tip dimension.

INSTALLATION

Protect pile head during driving [using collar], with full bearing on pile butt for even distribution of hammer blow.

Deliver hammer blows to central axis of pile.

If driving is interrupted before refusal, drive an additional [12] [___] inches ([300] [___] mm) before resuming recording of performance data.

Re-drive piles which have lifted due to driving adjacent piles, or by soil uplift.

Do not damage piles during driving operations.

Cut off tops of piles to elevations indicated and prepare pile top to receive [pile cap.] [grade beams.] [__________.]

Prevent surface damage to treated piles.

[Apply preservative to exposed ends of cut-off piles in accordance with [AWPA M4] [__________].]

TOLERANCES

Maximum Variation From Vertical For Plumb Piles: 1 in [48.] [___.]

Maximum Variation From Required Angle For Batter Piles: 1 in [24.] [___.]

Top Cut-off Elevation: Maximum [4] [___] inches ([100] [___] mm) from elevation indicated.

FIELD QUALITY CONTROL

Field inspection will be performed under provisions of Section [01400.] [01410.] [_____.]

Perform load tests to requirements of Section [02356.] [_____.]

Test Piles: Same diameter and type as specified for other piling, placed in same manner.

Accepted test piles may [not] be used in the Work.

UNACCEPTABLE PILES

Unacceptable Piles: Piles that fail tests, are placed out of position, are below cut-off elevations, or are damaged.

Provide additional piles or replace piles to conform to specified requirements.

END OF SECTION