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Port Gardner Storage Facility Volume 7 Attachment O <br /> Page 24 <br />CITY OF EVERETT ⋅ 3200 Cedar Street ⋅ Everett, WA 98201 ⋅ (425) 257-8800 ⋅ Fax (425) 257-8882 <br /> <br />The callout in Drawing GX-30-3002, Section 2 states to remove the existing <br />concrete to the existing reinforcement. Uncovered/exposed rebar during <br />demolition should be protected from corrosion prior to placement of new topping <br />slabs and cellular fill as shown in the Area 30 Structural Drawings; similar to <br />protecting exposed rebar in new work until concrete placement as stated in <br />Specification 03 01 00 Concrete Repair. <br />Q120 - Micropile design loads: Please clarify micropile design loads. No loads are <br />stated in the Contract Documents. <br />Micropile design loads are shown on Tables 2, 3, and 4 of the May 2025 <br />Geotechnical Report Port Gardner Wet Weather Design. No lateral capacities are <br />intended for micro piles. <br />Q121 - Micropile quantity measurement and payment: Bid items no. 26 and 27 indicate <br />micropile quantity of 2,250 LF. Section 31 66 33 2.01 A. 1. states that “final embedment <br />into the advance outwash deposit shall be determined by the contractor”. Please <br />confirm or otherwise clarify that if the Contractor determines that deeper/longer <br />micropiles are required and total LF quantity exceeds the bid quantity, that the actual <br />installed micropile length, as determined by the Contractor, will be paid at the bid item <br />unit rate. <br />See 00 72 00 Section 9.2 Payment for Changes in unit bid quantities. <br />Q122 - Micropile reinforcing requirements: 31 66 33 2.01 D. 1. States that Grade 75 ksi <br />bars are required. High strength Grade 150 ksi is typically acceptable for micropile <br />reinforcing bar. Please clarify is Grade 150 ksi threadbar meeting requirements of <br />ASTM A 722 is acceptable. <br />150 ksi is acceptable. Project specifications are designed for lower strength bars. <br />If alternative grade is used, splice length, development length, embedment depth, <br />and steel fabrication and testing must comply with applicable ACI standards for <br />150 ksi steel. <br />Q123 - Micropile acceptance criteria for vertical movement: 31 66 33 3.03 D. 2. states <br />that acceptance is based on sustaining design load “with no more than 0.50-inch total <br />vertical movement at the top of the pile that is measured relative to the top of the pile <br />prior to the start of testing”. Please clarify if this 0.5-inch is in addition to elastic <br />elongation at design load, or if reinforcing bar should be selected such that total <br />movement including elastic elongation is less that 0.5-inch. <br />Total vertical movement, including the elastic, specified in 31 63 33 3.03.D.2 shall <br />be no more than 0.50-inches. <br />Q124 - Please provide the design loads of micropiles, in particular: compression, <br />tension and shear loads.