Determine site specific soils information: soil type, soil description, soil classification, water table levels and depth of frost penetration.

Compare soils information with pile load and location information. Pile spacing - is there a group effect among piles?

Design Pile - pile geometry... Select: pile shaft, helix diameter and thickness, number of helixes, embedment depth, extension required? Bolt-on or welded?

Evaluate Design - Practical? Can designed pile be installed? Do soil conditions allow for installing? Equipment/Power? Possibly repeat Step 4.

The steps are to be used as a guide in the pile design process, other factors may come into play when designing a screw pile (ie. seismic considerations, soil chemistry, etc.)