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Structural Calculations - Residence Underpinning <br /> ; <br /> Project Name : May Residence Project No. : 19001.18 <br /> EC <br /> Designed By : DET Date : 10-Jun-19T" <br /> CZOMf ANY <br /> Check Existing Foundation and Concrete Wall <br /> *conservatively assumed as plain unreinforced concrete <br /> Section Properties <br /> b Foundation Width, b = 6 in <br /> Foundation Depth,d = 33 in <br /> Cross-sectional Area,A = 198 in2 <br /> FM i <br /> Section Modulus,Sx = 1089 in3 <br /> AS OCCURS NOT <br /> CONSIDERED FOR Concrete Strength,f'c = 3000 psi <br /> MOMENT CAPACITY) iliptip t <br /> 0,,, , <br /> id <br /> Foundation/Stem Wall Demands <br /> Max Support Spacing, L = 8 ft 4i , <br /> w = 1233 plf LRFD <br /> Mu = 9866 lb-ft <br /> Foundation/Stem Wall Capacity <br /> Mn.comp = 231413 lb-ft ACI (14.5.2.1a) <br /> (Controls) Mn.tension = 24853 lb-ft ACI (14.5.2.1b) <br /> phi = 0.6 - ACI Table 21.2.1 <br /> phi*Mn = 14912 lb-ft <br /> Foundation/Stem Wall DCR <br /> DCR=Mu/(phi*Mn) '',-‘0)4011,,;,1,- OK <br /> Tower Engineering Company 21907 64th Ave.W,Suite 140, Mountlake Terrace,WA 98043-2298 Sheet 6 of 7 <br />