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COBALT BUILDING DRAINAGECONTROLCALCULATIONS <br /> -��, � F. �5 r— 0.883 cfs <br /> �� . - Q P�''— Y <br /> '� � Trial Pipe Pipc <br /> '�� `• �'.; Dia (in) Matcrial n Slope Q (cfs) <br /> ;�1.� <br /> ,,.:;_:. . 8 Concrctc 0.013 OA1 1.21 ok <br /> ��:,�. , � <br /> r;; Check vclocity,using Elcmcnts of Circular Scclions": <br /> r' ' <br /> �_;�. _ , QIQ full = 0.73 <br /> VN full = 1.(N� (Gom chan) <br /> V = 3.77 (Us ok <br /> F'ublic Storm Drain in 36th Slrcet bci�vccn CB 3 and CF3 1: <br /> To bc conscrvativc,wc will assumc all of the drainagc fmm thc adjacent apartmcrt <br /> building to the south discharges to C@ 2. Also include arca from half of 36th Slrect in <br /> thc calculations. <br /> Contributing Arcas: <br /> Arca C Area x C <br /> hnpervious 14,505 0.9 13,055 <br /> Pcrvious 18,901 0.2 3.780 _ <br /> ToWI 33,406 0.50 16,835 <br /> Frc�m prcvious calculations, i =3.1 inlhr for a 25 ycar stonn ( « 5 minutes). <br /> Q pcak, 35 yr= 1.198 cfs <br /> Trial Pipe Pipe <br /> Dia. (in) Matcrial n Slopc Q (cfs) <br /> 8 Concrctc 0.013 0.01 1.?1 ok <br /> Cl�eck ��cla:ity,using "Elements of Circular Sections": <br /> Q/Q full = U.99 <br /> V/V full = 1.14 (from chait) <br /> t/ = 3.95 fUs ok <br /> a< � <br /> � , �� �. l iV��,'�, i��� �' . <br /> \. 4 <br /> . �j4:�'���u, <br /> N <br /> `�' w � 5/17/95 <br /> L.ayton& Scll Page 6 of 6 = <br /> ,�..� <br /> ^ ,J <br /> t` , <br />