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BOEING COMMERCIAL AIRPLANE COMPANY <br /> EVERETT FACILITY <br /> BUILDING 40-26 <br /> EVERETT, �NASHINGTON <br /> STRUCTURAL PE[R REVIEW COMMENTS ON • <br /> 90% STRUCTURAL STEEL SUBMITTAI. <br /> RESPONSES & CONSTRUCTION DRAWINGS <br /> MARCH 30, 1992 il <br /> Note: Comments on Structural Steel Design, comment numbers 1 through 36, II <br /> were sent on March 13, 1992• ! <br /> 1 . RT-18 �ot t uss on Line R fo'rgaavity oad plus w ndgoad vertfCsl struts of II <br /> a, The axial load used seems to use the results ot the computer i <br /> member 15 orlhe same eoad combinatlon is somewhet grea ern , <br /> (42.3 kips). <br /> b, The axlel loads in the members appear to be compression loada. It i <br /> also appears AISC Formula H1-3 was used to check combined <br /> streases. However, AISC seems to Ilmlt the use ot this formula to <br /> st ess (ta/Fa) Iselesahthanl0.15 t Howevert in$thls case the �a�o axial <br /> usedarUs ng a Cm coetticient of 1 0, we calcul euan overst esa ofe <br /> about 33%, Please review this and the same stresses tor the struts <br /> of the RT-81 rool trusses on Line R. <br /> The wrong calculations were submitted on March 30, 1992• Enclosed are the <br /> revfsed calculations for Roof Truss RT-18. (Also enclosed are calculations for <br /> RT-Ba - Same as the 40-36 Building previously submitted). The revisod <br /> configur�tion of the Crane Rail Support (Bott. chord vs. hanger to post) <br /> reduced the axial force in the post members sufficiently to validate member <br /> sizes as shown. <br /> 1 <br />