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The allowable axial compression load of a helical pile shall be verified by load tests in accordance with the requirements of Section 1810.4, except that ASTM D1143 may be conducted using the Quick Load Test Loading Procedure. Following each compression load test, the helical pile being tested shall be removed by unscrewing and inspected for any deformations to the helices to verify the structural integrity of the shaft and its connections.
1814.4.1.1 Required Number of Axial Compression Load Tests
The number of axial compression load tests shall satisfy Section 1810.4.
Exception: Load tests on helical piles shall not be required, provided the following conditions are satisfied:
  1. The helical pile has a torque to capacity ratio approved in accordance with Section 28-113.2.1 of the Administrative Code;
  2. The torque correlation shall demonstrate a factor of safety (FS) of 2.5 on the allowable load; and
  3. The maximum allowable axial compression load on the helical pile shall be 10 tons (98 kN).
1814.4.1.2 Acceptance Criteria
The allowable load on the helical pile shall be computed in accordance with Section 1810.4.1.5.

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