2026 GRAND AVE 2016-01-01 MF Import

Subsurface Ezploration and 2026 Grand�tvenue Geotechnical Engineering Report Everett Washin ton Desigrs Recommendatioru 9.0 FOUNDATIONS Spread footings may be used for building suppor[ when founded on medium dense to dense, natural sediments. It is anticipa[ed that medium dense to dense, natural sediments will be exp�sed at shallow depths (within 3 feet of flo�r erades) within che eastern half of the building. AESI should conduct a soil bearing evaluation within foundation areas. We tecommend that an allowable bearing pressure of 2,500 pounds per square foot (ps� be utilized for design purposes, including both dead and live loads. An increase of one-third may he used for short- term wind or seismic loading. Perimeter footings slwuld be buried at least 18 inches into the surrounding soil for frost protection. All footings must penetrate to the prescribed bearing stratum, and no foo�ing should be founded in or above loose or organic soils. All footines should have a minimum width of 18 inches for three-story structures. It should be noted that the area bound by lines estending downward at 1H:1V from any footing must no[ intersect another footing, or in[ersect a filled area that has not been compacted to at least 95 percent of ASTM:D 15�7. 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 setdement of footings founded on medium dense to dense, natural sediments, or approved structural fill, should be less than u< inch. However, dismrbed soil not removed from footing excavations prior to footing placement could result in increased settletnen[s. All footing areas should be inspected by AESI prior to placing concrete to verify [hat the design bearing capaciry of the soils has been attained and that construction conforms to the rccommcndations contained in this report. Perimeter footine drains should be provided as discussed under the section on Drainage Consrderations. 9.1 Aueercast Piles Cast-in-place concrete piles (aueercast) are recommended for foundan.on support within the western half of the building. We recorrunend that the placement of all piles be accomplished by a contractor experienced in their installation. lVe estimate pile lengths will be on the order of 20 to 30 feet �vidi an embedment of 8 feet into the bearing strata. Pile length estimates are relative to existing site grades precent at the time of our exploration and should be adjusted accordingly it the sire is graded prior to pile installation. , .Allowable design loads may be increased by one-diird for short-term �vind or seismic loading. Anticipated settlements of augercast pile-supported structures will eenerally be less [han 1 inch. � Junel9, 20fi0 EXHIBIT #� �iSSOG.9TEDEARTHSClENCES. INC. I��'S,Au-AE001/9G1-u)-0��tc'6�)- 14.K p„GF_�F FI' Page9