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// CODE SNIPPET

1808.4.2 Uplift Load Test

NYC Building Code 2014 > 18 Soils and Foundations > 1808 Deep Foundations > 1808.4 Load Tests > 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.

1808.4.2.1 Uplift Load Test Procedures

Uplift load tests shall be conducted in accordance with ASTM D 3689 standard procedures and the following conditions:
  1. 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.
  2. 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.

1808.4.2.2 Uplift Load Test Apparatus and Inspection Requirements

The apparatus and structure to be used in making the load test shall be designed by an engineer. Load tests shall be performed under the observation of the special inspector. A complete record of such tests shall be filed with the commissioner.

Related Code Sections


1808.4.2 Soils and Foundations, Uplift Load Test
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 ...
NYC Building Code 2014 > 18 Soils and Foundations > 1808 Deep Foundations > 1808.4 Load Tests > 1808.4.2 Uplift Load Test
1810.4.2 Soils and Foundations, Uplift Load Test
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 ...
NYC Building Code 2022 > 18 Soils and Foundations > 1810 Deep Foundations > 1810.4 Load Tests > 1810.4.2 Uplift Load Test
1810.3.4 Soils and Foundations, Allowable Uplift Load
practices based on a minimum factor of safety of three or by uplift load tests performed in accordance with Section 1810.4.2.1. Where uplift load tests ...
NYC Building Code 2022 > 18 Soils and Foundations > 1810 Deep Foundations > 1810.3 Allowable Deep Foundation Loads > 1810.3.4 Allowable Uplift Load
1808.2.8.5 Soils and Foundations, Uplift Capacity
on a minimum factor of safety of three or by uplift load tests conducted in accordance with ASTM D 3689. The maximum allowable uplift load shall ...
NYC Building Code 2008 > 18 Soils and Foundations > 1808 Pier and Pile Foundations > 1808.2 Piers and Piles—General Requirements > 1808.2.8 Allowable Pier or Pile Loads > 1808.2.8.5 Uplift Capacity
1810.4 Soils and Foundations, Load Tests
Where uplift load tests are required, one uplift load ...
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