7815 E GLEN DR 2016-01-01 MF Import

Option 1• Saread Fuotin s Spread foutings may be used for building support when founded on the den5e ro very dense, natural, unweathered lodgement till sediments. We recommend that an allowable bearing • pressure of 2,500 pounds per squaze foot (ps� be utilized for desiga nur?oscs, induding both dead and live loads. An increase of one-third may be used for s?;or_ '�.:�n wind or seismic loading. Perimeter footings should be buried at least 18 inches uuo the surrounding soil for frost protecdon. No minimum burial depth is requLed for interior footings. However, all footings must penetrate to the prescribed bearing stratum and no footing shall be founded in or above loose, organic, or existing fill soils. For a one-story savcture H•ith a daylight basement, all footings should have a minimum width of 16 inches. For a two-story structure with a daylight basement, all footings should have a minnnum wid�h of 18 inches. It should be noted that the area bounded by lines extending downward at 1H:IV from any footing must not intersect another footing or intersE�ct a filled area which has not been compacted to at least 95 percent of ASTM:D 1557. In addition, a 1.SH:1V line extending down from any footing must not daylight because sloughing or raveling may eventually undermine the footing. Thus, footings should not be placed near the edge of steps or cuts in the bearing soils. Anticipated settlement of footings founded on the nacural, dense to very dense, unweathered lodgement till sediments should be less than 1 inch. However, disturbed soil not removed from footing excavations prior to foodng placement could result in increased settlements. All footings should be inspected by AESI prior to placing concrete to verify that the design bearing capacity of the soils has been attained and that construction cunforms with the recommendations contained in this report. Such inspections may be required b}� �he aoverning municipality. Perimeter footing drains shoeld be provided as discussed under the section on Drainage Considerations. Option 2• Drilled Piers Another alternative for foundation support for the proposed structure would be to utilize a deep foundation system consisting of drilled in-place concrete piers. Installation of drilled piers consists of placing concrete in pre-drilled, open holes. Ground water seepage and some minor caving was observed in the exploration pits excavated at the site. Consequendy, if a drilled pier foundation is used, the contractor should be prepared to case the excavations and handle the water, if necessary. We recommend the use of a concrete pump with its hose extended to the bottom of the hole to assure that any seepage present is adequately displaced during pumping of the concrete. Piers with a minimum diameter of 16 inches, and properly reinforced, will be capable of supporting an allowable vertical compressive load of 10 tons per pier. An allowable lateral capacity of 2 tons per pier can be used assuming a fixed head condition and a maximum 1 inch of detlecticn at the ground surface. An uplifr capaciry of 2 tons per pier can also be assumed. 11