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AN <br />Irs• <br />Square Footing Design ( 94 USC (91 NDS)1 Ver. v4051857 <br />By: DELCON SERVICES, DELCON SERVICES <br />on: 01-10-1998 <br />Project: JN3127 - Location: FTG "B" <br />Summary: <br />Size: 3.75 FT x 3.75 FT x 10.00 IN <br />Reinforcement #4 BARS @ 9.00 IN O.C. ENV Or (5) #4 BARS E/W <br />• Reinforcement development <br />length Inadequate. <br />• Increase embedment <br />length or provide mechanical anchoragelhooks. <br />Footing Loads: <br />Live Load: <br />PL= <br />11310 <br />LB <br />Dead Load: <br />PD- <br />7691 <br />LB <br />Total Load: <br />PT= <br />19000 <br />LB <br />Ultimate factored load: <br />Pu= <br />29993 <br />LB <br />Footing Properties: <br />Allowable soil bearing pressure: <br />Qs= <br />1500 <br />PSF <br />Effective soil bearing pressure: <br />Qe= <br />1375 <br />PSF <br />Concrete compressive strength: <br />Fc= <br />2500 <br />PSI <br />Reinforcing steel yield strength: <br />Fy= <br />40000 <br />PSI <br />Concrete reinforcement cover. <br />c= <br />3.00 <br />IN <br />Selected Size: <br />Length: <br />L= <br />3.75 <br />FT <br />Width: <br />W= <br />3.75 <br />FT <br />Area: <br />A= <br />14.06 <br />SF <br />Ultimate bearing pressure: <br />Qu= <br />2133 <br />PSF <br />Column Base Dimensions: <br />Length: <br />1= <br />36.00 <br />IN <br />Width: <br />w= <br />6.00 <br />IN <br />Footing Size Selection: <br />Required footing area: <br />Areq= <br />13.82 <br />SF <br />Minimum footing size required: <br />Lreq= <br />3.72 <br />FT <br />Footing depth based on shear stresses: <br />Selected footing depth: <br />D= <br />10.00 <br />IN <br />Effective steel depth: <br />d= <br />6.25 <br />IN <br />Punching Stress Calculations: <br />Critical perimeter. <br />Bo= <br />109.00 <br />IN <br />Punching shear. <br />Vu1= <br />22327 <br />LB <br />Punching shear stress: <br />vu1= <br />39 <br />PSI <br />Ailowable punching shear stress: <br />vc1= <br />133 <br />PSI <br />Beam shear stress calculations: <br />Beam shear. <br />Vu2= <br />8831 <br />LB <br />Beam shear stress: <br />vu2= <br />37 <br />PSI <br />Allowable beam shear stress: <br />vc2= <br />100 <br />PSI <br />Bending Requirements: <br />Factored moment <br />Mu= <br />126720 <br />IN -LB <br />Concrete compressive block depth: <br />a= <br />0.24 <br />IN <br />Minimum Steel Requirements: <br />Steel required based on moment <br />As 1 = <br />0.15 <br />IN2/FT <br />Minimum code required reinforcement <br />As(2)= <br />0.20 <br />IN2/FT <br />Controlling reinforcing steel: <br />As regd= <br />0.20 <br />IN2/FT <br />Selected reinforcement #4 <br />BARS @ 9.00 IN. O.C. <br />As= <br />0.26 <br />IN2JFT <br />Development Length Required: <br />Ld= <br />12.00 <br />IN <br />Development Length Supplied: <br />Ld_sup= <br />3.50 <br />IN <br />7 <br />