3333 NASSAU ST 2024-08-07 - Laserfiche WebLink

October 3, 2016 Single4samily Residence L&A Job No. 16-124 Page 13 EXCAVATION AND FILL SLOPES sections of this report Ground steeper than 15% grade should be cut into level benches with vertical steps not higher than 3 feet after the surficial weak soils are stripped. Structural fill should be placed in lifts no more than 10 inches thick in its loose state, with each lift compacted to a minimum percentage of the maximum dry density determined by ASTM D1557 (Modified Proctor Method) as follows: Application %of Maximum Dry Density Within building pads and under foundations 95% Roadway/driveway subgrade 95% for top 3 feet and 90%below Retaining/foundation wall backfill 92% Utility trench backfill 95%for top 4 feet and 90%below In-situ density of structural fill should he tested with a nuclear densometer by a testing agency specialized in fill placement and construction work. Testing frequency should be one test per every 250 square feet per lift of filL BUILDING FOUNDATIONS Conventional footing foundations may be used to support the house. The footing foundations should be constructed at least one foot into the underlying very-dense cemented glacial till and/or hard transitional beds soil, but not the advance outwash soil. The edge of footings should set back laterally at least 8 feet from the face of the slope, as shown on Plate 6. Water should not be allowed to accumulate in excavated footing trenches. Disturbed soils in footing trenches should be completely removed down to LW & ASSOCIATES, INC.