// CODE SNIPPET
1808.4.2 Uplift Load Test
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Where uplift load tests are required, one uplift load test shall be conducted in each area of substantially similar subsurface conditions up to 5,000 square feet (465 m2) of building footprint where piles are subjected to uplift, and not less than two uplift load tests shall be conducted for each area of building footprint where piles are subjected to uplift between 5,000 square feet (465 m2) and 30,000 square feet (2787 m2) and for such area one additional upload load test shall be conducted for each 20,000 square feet (1860 m2) of additional area of building footprint where piles are subject to uplift. For conditions where multiple pile types or capacities are used, refer to Section 1808.2.5.
Uplift load tests shall be conducted in accordance with ASTM D 3689 standard procedures and the following conditions:
- Dial extensometer gages shall provide readings to the nearest 0.001 inch (0.025 mm). Electrical transducers may be used to make settlement observations provided that backup measurements are made utilizing dial extensometers as described herein at sufficient times to validate the transducer readings.
- Any temporary supporting capacity that the soil might provide to the pile during a load test, but which would be dissipated with time, shall be eliminated by casing off or by other suitable means, such as increasing the total test load to account for such temporary capacity.