S06 - Specification 31 62 16 HELICAL PIERS - ADDED.pdf

Milwaukee VAMC 07-01-16 695-20-104 Upgrade Power Bldg. 112 100% Construction Documents Milwaukee, WI 53295 March 31, 2022

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SECTION 31 62 16

STEEL HELICAL PILES

PART 1 - GENERAL

1.1 SUMMARY

A. Related Documents:

1. Drawings and general provisions of the Subcontract apply to this

Section.

2. Review these documents for coordination with additional requirements and information that apply to work under this Section.

B. Section Includes:

1. [Foundation stabilization] [Tie back anchor installation].

C. Related Sections:

1. Division 01 Section "General Requirements."

2. Division 01 Section "Special Procedures."

3. Division 03 Section "Cast-in-Place Concrete".

4. Division 03 Section "Concrete Reinforcing".

5. Division 31 “Earthworks".

D. Basis for Payment:

1. From the data obtained as a result of installation, calculate actual total net length of piers used. Contract price per linear foot includes labor, materials, tools, equipment and incidentals, and for performing work for furnishing, installing, cutting off and capping piers. This includes splicing and disposal of cut-offs.

2. Measurements will be based on effective length of piers in place, with fractional lengths measured to nearest foot. Payment for linear footage in excess of that given in Paragraph A, and credit for linear footage less than that given in Paragraph A, shall be made at unit prices stated in the Contract, based on net addition or deduction.

3. No payment will be made for rejected piers, including piers installed out of place, imperfect piers, or piers damaged in installing or handling.

1.2 REFERENCES

A. General:

ACCOMPANYING 36C25222B0030 0003

Milwaukee, WI 53295 March 31, 2022

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1. The following documents form part of the Specifications to the extent stated. Where differences exist between codes and standards, the one affording the greatest protection shall apply.

2. Unless otherwise noted, the referenced standard edition is the current one at the time of commencement of the Work.

3. Refer to Division 01 Section "General Requirements" for the list of applicable regulatory requirements.

1.3 DEFINITIONS

A. Helical Pier: Helical Pier Foundation System consisting of helical steel piers with one (or more) helically shaped steel plate attached to a central steel shaft. Piers are extended by adding shaft extensions.

1.4 SUBMITTALS

A. Submit under provisions of Division 01 Section "General Requirements."

B. Submit certification that manufactured components comply with ICBO report ER-5110 or PFC-5551.

C. Submit 2 copies of installer's certification from the manufacturer to install the system.

D. Submit 2 copies of project records specified in Paragraph 3.05 below.

E. Project Closeout Submittals: Record Drawings.

1.5 QUALITY ASSURANCE

A. Installer Qualification: Installers specializing in performing the work of this section with documented certification from the manufacturer.

PART 2 - PRODUCTS

2.1 MANUFACTURED COMPONENTS

A. Helical plate, pier lead section and extensions, bolts and foundation attachment brackets conforming to the applicable ICBO evaluation report.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify site conditions under provisions of Division 01 Section "Special

Procedures."

3.2 PREPARATION

A. Use placement method which will not cause damage to nearby structures.

B. Prepare to place [piles] [tie back anchors] from excavated working elevation.

Milwaukee, WI 53295 March 31, 2022

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3.3 INSTALLATION

A. Install by certified contractor or dealer.

B. [Connect helical piers to the structure] [Install helical piers] as detailed on structural drawings.

C. Provide electric or hydraulic powered, rotary type installation torque units with forward and reverse capability which are capable of positioning the pier at the designed angle.

D. Connect the installation units with manufacturer's approved adapters.

Provide safe connection to piers and extensions.

E. The minimum installation equipment rating shall equal or exceed the maximum torque rating of the specified helical pier.

F. Securely connect the installation equipment to the pier during installation.

G. Monitor torque applied by the installing units during the entire installation and record values achieved on each pier.

H. Provide a torque monitoring device as part of the installing unit or as a separate in-line device.

I. Make calibration torque monitoring data available for the Engineer, Inspector, and University.

J. Position helical pier as indicated. Establish proper angular alignment at the start of installation.

K. Install piers in a smooth and continuous manner; the rate of pier rotation shall be five to twenty revolutions per minute.

L. Apply sufficient downward pressure to advance the pier.

M. Provide extension material to obtain indicated depth. Couple the helical pier and extension sections with bolts in accordance with ICBO report ER-5110.

N. Remove encountered obstructions or relocate the helical pier and adjacent helical piers as required.

O. Install to the minimum depth indicated. Provide a minimum of five 5 feet (1.5 m) of ground cover above the top helix. Obtain written permission from the EOR before proceeding if indicated depth or minimum torque cannot be obtained.

3.4 FIELD QUALITY CONTROL

A. Field inspection and testing when required will be performed under provisions of Division 01 Section "General Requirements." Special

Milwaukee, WI 53295 March 31, 2022

31 62 16 - 4 inspection as specified in the applicable ICBO evaluation report is required in accordance with Section 1701 of the CBC.

B. Monitor torque applied by the installing units during the entire installation.

C. Provide torque monitoring device as part of the installation unit or as a separate in-line device.

3.5 PROJECT RECORD DOCUMENTS

A. Accurately record the following:

1. Type [number and size of helices], and size.

2. Deviation from indicated locations.

3. Actual locations of helical piers, pier diameter, and pier length.

4. Installation angle below horizontal.

5. Extension length along shaft and datum.

6. Anchor testing if required.

7. Torque-installation records on piers.

8. Torque monitoring calibration data.

3.6 DEPTH AND TORQUE TOLERANCES

A. Helical piers that reach maximum torque rating before reaching minimum indicated depth shall be subject to the following:

1. Terminate at depth obtained with written approval to Engineer.

2. Replace helical pier with smaller and/or less helices, installed 3 feet (0.9 m) minimum beyond termination of original helical pier.