- Input
- Results
- Help

Graph goes here. Javacript not available.

This application calculates settlement of a footing placed on a cohesionless material (sand) using the Schmertmann method (Schmertmann, 1970, Schmertmann et al, 1978).

### Input

- Units:
- kPa: This gives stress in kPa (kilopascals), length in m (meters) and settlement in cm (centimeters)
- ksf: This gives stress in ksf (1000 pounds per square foot), length in feet and settlement in inches
- tsf: This gives stress in tsf (tons per square foot), length in feet and settlement in inches

- Layers:
*Thickness*: This is the thickness of each layer starting from the surface, not from the bottom of the footing.*q*: This is the cone tip bearing resistance from a Cone Penetration Test._{c}*E*: This is the one-dimensional modulus used in the settlement calculation. You may choose to enter this directly. Otherwise, it will be calculated from_{s}*q*(see below)_{c}- γ
_{moist}: Unit weight of soil above the water table. - γ
_{sat}: Unit weight of soil above below the water table (saturated).

- Options:
- Use
*E*: By default, you must enter_{s}*q*for each layer and the program converts to the one-dimensional modulus_{c}*E*(as shown here). By choosing this option, you may enter_{s}*E*directly._{s} - Use modified Schmertmann (1978): In Schmertmann et al (1978), more accurate equations were derived for the strain profile and for converting
*q*to_{c}*E*_{s} - Subdivide layers: The accuracy of results improves as more layers are entered. Select this option and the program will automatically divide up your soil layers to ensure a good discretization

- Use

### Settlement Calculation

Details of the settlement calculation can be found here.