Self Support Towers

Provide one soil boring per site and provide the following information at a minimum.

• Allowable bearing pressure at incremental depths to a depth of 20′ for shallow foundation or 60′ plus or minus for drilled pier foundations
• Water table below grade
• Soil weight in pounds per Cu. Ft.
• Skin friction values if drilled pier foundations are required
• N values for all samples
• Rock Quality Designation (RQD) if rock foundations are required
• Passive Pressure coefficient for granular soils (KP), (PHI) and cohesion values for clay soils (c)
• Soil electrical resistivity, pH values and corrosive nature of soil.

Guyed Towers

Provide four to seven soil borings per site and provide the following information at a minimum.

• Allowable bearing pressure required at base (3′ – 6′ depth).   All borings should be 15′ to 20′ deep.   If drilled pier foundations are anticipated, boring depths should be increased to between 30′ and 50′
• Water table below grade
• Soil weight in pounds per Cu. Ft.
• Skin friction values if drilled pier foundations are required
• N values for all samples
• Rock Quality Designation (RQD) if rock foundations are required
• Passive Pressure coefficient for granular soils (KP), (PHI) and cohesion values for clay soils (c)
• Soil electrical resistivity, pH values and corrosive nature of soil.