Laserfiche WebLink
Geotechnical Engineering Investigation Page 14 of 24 <br /> New Residential Subdivision <br /> 2706 Pock Lane <br /> Stockton, CA 95205 <br /> March 30, 2021 CTE Job # 25-1097G <br /> soils. The post tensioned system should be designed by a structural engineer experienced <br /> in post tensioned slab design and design criteria of the Post Tensioning Institute(PTI),third <br /> edition. The following post-tension foundation design should incorporate the geotechnical <br /> parameters shown below for either moisture conditioned native material or lime treated <br /> subgrade. <br /> Post Tensioned Foundation Design Parameters <br /> Non-Lime Treated Subgrade <br /> • Thornthwaite Index: -34 <br /> • Equilibrium Suction: 4.09 <br /> • Moisture Variation Distance, em(ft): Center Lift 9.0, Edge Lift 4.2 <br /> • Differential Soil Movement, ym(in): Center Lift 0.46, Edge Lift 1.25 <br /> • Settlement: Total = 1.0 inch, Differential=0.5 inch <br /> • Expansion Potential: High <br /> • Allowable Bearing Capacity: 2,000 psf <br /> • Subgrade Modulus (k-value): 90 psi/inch <br /> • Subgrade Friction Coefficient: 0.30 <br /> Lime Treated Subgrade (12"Minimum) <br /> • Thornthwaite Index: -34 <br /> • Equilibrium Suction: 4.09 <br /> • Moisture Variation Distance, em(ft): Center Lift 9.0, Edge Lift 4.7 <br /> • Differential Soil Movement, ym(in): Center Lift 0.27, Edge Lift 0.75 <br /> • Settlement: Total = 1.0 inch, Differential=0.5 inch <br /> • Expansion Potential: Low <br /> • Allowable Bearing Capacity: 2,000 psf <br /> • Subgrade Modulus (k-value): 125 psi/inch <br /> • Subgrade Friction Coefficient: 0.30 <br /> The recommended parameters above are based on the materials observed at the site and the <br /> conditions anticipated following preparatory site grading.It is imperative that CTE observe <br /> the onsite grading to confirm that actual conditions are as anticipated by the referenced <br /> soils reports. <br /> Foundation dimensions and reinforcement should be based on allowable soil bearing values <br /> of 2,000 pounds per square foot(psf) for footings of at least 12-inches in width penetrating <br />