Laserfiche WebLink
<br />- <br /> <br />BOTAS ENGINEERING, INC. <br /> <br />Job Sunny Isles Restaurant <br /> <br />Consulting Engineers <br /> <br />- <br />Sheet No. of <br /> <br />Calculated by DBC Date 5/2010 <br /> <br />Patricia M. Botas - Florida License # 41829 <br />7875 NW 12th Street, Suite 120 - Miami, FL 33126 <br /> <br />Checked by PMB Date 5/2010 <br /> <br />Calculation of Moment of inertia of cracked section <br /> <br />Comp. Steel : <br /> <br />2 <br />Asc := I . Om <br /> <br />2 <br />Asc = 0.00 m <br /> <br />Dlst. Old I": d I := dt - d <br /> <br />d I = 2.3 m <br /> <br />Tension Steel : <br /> <br />2 2 <br />Ast := I . 0.31m Ast = 0.3 I m <br /> <br />Parameter "B" : <br /> <br />B:= <br /> <br />b <br />n. Ast <br /> <br />-I <br />B = G7. 7 ft <br /> <br />Ratio : <br /> <br />(n - I) . Asc <br />r := r = 0 <br />n. Ast <br /> <br />kd :~[J2-d-B-(' + r-:')+(I +r)2_(1 +r)].B-kd = 1.3m <br /> <br />Moment of mertla of cracked <br />section transformed to concrete : <br /> <br />ICR:= <br /> <br />b . kd3 n . Ast (n - I) . Asc <br />+ + <br />3 (d - kd) - 2 (kd - d I r 2 <br />Ig := b. dt3. 12- 1 <br /> <br />4 <br />Ig = 5 12m <br /> <br />4 <br />ICR = 49.G9 m <br /> <br />Moment of mertla of gross concrete <br />section about centroldal aXIs : <br />(Neglecting reinforcement) <br /> <br />Distance from centroldal aXIs of <br />gross section, neglecting remf., <br />to extreme fiber m tension : <br /> <br />Yt := 0.5 . dt <br /> <br />Yt = 4 m <br /> <br />Effective moment of mertla : <br /> <br />-I <br />MCR := f r . Ig . Yt <br /> <br />'e:= (~:Rr - Ig +[ I -(~:RJ1'CR <br /> <br />MCR = G KiP' ft <br /> <br />Crackmg moment : <br /> <br />= 949'12] <br /> <br />Deflection due to Uniformly Distributed Loads <br /> <br />UMlformly Dlst. Service Load: <br /> <br />WServ := (WDL.5 + WLL.S)ft <br /> <br />4 <br />5 WServ' L <br />OR.slab.u := 384' Ec. Ie <br /> <br />OTot := OR.slab.u <br /> <br />WServ = 225 plf <br /> <br /> <br />="0.0 <br /> <br />OTot = Om <br /> <br />Deflection : <br /> <br />L <br />- = 0.43 In <br />3GO <br /> <br />> <br /> <br />OR.slab.u =0.04m <br /> <br />= > Venf1catlon OK <br /> <br />Slab Desian Summary <br /> <br />Slab depth = 8" <br />Mam Remf. at middle span locatlon--> #5@ 12" o.c. ea. way (Bottom) <br />cover = 2.0" <br /> <br />75 <br />