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DocuSign Envelope ID:AD41 E8C7-FC41-4249-A9C6-849589FOC156 <br /> SECTION 316613 — HELICAL PIERS <br /> PART 3 - EXECUTION <br /> 3.1 INSTALLATION <br /> A. Installation Procedures <br /> 1. The helical pier shall be positioned as shown on the project drawings. <br /> Proper angular alignment shall be established at the start of the installa- <br /> tion. <br /> 2. Helical pier shall be installed in a smooth, continuous manner. The rate of <br /> pier rotation shall be in the range of 5 to 20 revolutions per minute. <br /> 3. Sufficient down pressure shall be applied to advance the pier. <br /> 4. Extension material may be required to position the pier to the depth re- <br /> quired. Extensions shall be coupled to the helical pier by using high <br /> strength bolts, installed and tightened to approximately 40 ft-lbs of torque. <br /> 5. If underground obstructions are encountered during installation, the Dealer <br /> shall have the option of removing the obstruction if possible or relocating <br /> the helical pier. This latter option may require the relocation of adjacent <br /> piers. <br /> B. Termination of Installation <br /> 1. Helical piers shall be installed to the minimum torque value corresponding <br /> to the load capacity indicated for each pier. <br /> 2. Maximum installation torque shall at no time exceed the torque rating of <br /> the helical pier shaft specified for the project. <br /> 3. Minimum depth of installation shall be as indicated on the drawings pro- <br /> vided the top helix is located at least 5 feet below the surface. <br /> 4. Pier installation shall be terminated provided the minimum installation <br /> torque and minimum depth requirements have been satisfied. <br /> 5. If the minimum torque requirement has not been satisfied at the minimum <br /> depth level, the Dealer shall have the following options: <br /> i. Install the pier deeper using additional extensions until the specified <br /> torque level is obtained. <br /> ii. Remove the existing pier and install a pier with larger and/or more <br /> helices. This revised pier shall be installed at least 3 feet beyond <br /> the termination depth of the original pier. <br /> iii. Add additional piers. <br /> 6. If the maximum torque rating of the pier and/or the installing equipment <br /> has been reached before reaching the minimum required depth, the Deal- <br /> er shall have the following options. <br /> i. Terminate the installation at the depth obtained <br /> ii. Remove the existing pier and install a pier with smaller and/or fewer <br /> helices. The revised pier shall be installed at least 3 feet beyond <br /> the termination depth of the original pier. <br /> Orange County Waste and Recycling For Proposal — Not for Construction <br /> Metal and White Goods Retaining Wall Repair 31 66 13 - 3 <br /> DAA PN R00592-204ST2 November 2020 <br />