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4. <br /> ENWSTRUCTLIPAL <br /> ENGINEERS <br /> Engineers Northwest Inc.,P.S. <br /> 19.The design of the column bases shall satisfy the requirements of AISC 341-10 Section D2.6. <br /> Calculations substantiating the design shall be submitted for review. See IBC Sections 1604.2, <br /> 1613.1, and 2205.2.1.2. The following comments shall be addressed: <br /> a. Calculations substantiating the design of the column bases for axial and shear loading shall be <br /> designed per AISC 341-10 Sections D2.6a and D2.6b. <br /> Response: Please see attached calculation of the base plate design. <br /> b. The anchorage of columns to the foundations shall be performed per ACI 318-14 Chapter 17. <br /> See AISC 341-10 Section D2.6; note that this section references ACI 318 Appendix D for the <br /> design of concrete anchors, which not occurs in Chapter 17. The anchors shall satisfy the <br /> requirements of ACI 318-14 Sections 17.2.3.4.2 and 17.2.3.5.2. The load combinations of <br /> ASCE 7-10 Section 12.4.2.3 and 12.4.3.2, including the vertical seismic load effect per Section <br /> 12.4.2.2, shall apply. <br /> Response: Please see attached calculation of the anchors. <br /> c. Continuing with the previous comment, the concrete footings in Detail 1/S1.2 do not have <br /> sufficient weight to resist the uplift forces from the braced frames. The connections between <br /> the footings and the slab-on-grade shall similarly satisfy the requirements of ACI 318-14 <br /> Chapter 17. <br /> Response: The footing has been revised to size 7'X 7'X 2.6'footing to resist the <br /> uplift on the most critical columns. Please see attached uplift resisting <br /> calculations. <br /> Miscellaneous: <br /> 20.The platform, including the stairways and intermediate platforms, shall be provided with guards <br /> along all walking.surfaces. Details shall be provided for the connections of the guards to the <br /> structure. Calculations substantiating the design of the guards, connections, and structural framing <br /> and connections supporting the guards, shall be submitted for review. See IBC Sections 1604.1, <br /> 1604.4, and 1607.8.1. <br /> Response: The detail has been added on 6/S3.1. Please see attached connection <br /> calculations. <br /> Please contact me if you have any questions. <br /> Sincerely, - e , <br /> ' <br /> ENGINEERS NORTHWEST, INC. P.S. ' <br /> / ..44,4%. ,. <br /> Samuel Han, P.E, s/ONA <br /> Project Engineer 2 t' <br /> Ai, <br /> MT. <br /> bs <br /> ENW Job No.18053000 <br /> 9725 Third Avenue NE•Seattle,WA 98115 <br /> 206.525.7560. 206.522.6698 <br /> www.engineers com <br />