Empowering the civil fresher

How to calculate the percentage of steel in concrete????? Before we go for calculation we should know, what is the role of the percentage of steel in civil? Basically Percentage of steel in concrete means, the ratio of (area of steel/ area of concrete) We calculate the ratio to know, how much percent of steel we can place in concrete. Question- we are having a column of (400*300)mm & it has 6 nos of 16 mm bar. So calculate the percentage of steel in concrete? Let us know how we calculate the ratio,                                                                                     ʃ = (area of steel/ area of concrete)  ʃ = (Ast/Asc)  Ast = nos. of bar × (π/4) × square of dia                                 Ast = 6 × (3.14/4) × 16 × 16 =1205.76 sqmm Asc = Length × Width Asc = 400×300 = 120000sqmm (All bars are 16 mm) According to our formula,  ʃ = (Ast/Asc)  ʃ = (1205.76/120000)  ʃ = 0.010048 To get result in percent we have to multiplies our answer

Change unavailable dia of steel at site?? Sometimes the required amounts of steel of a particular dia are not available at site, so we have go for higher dia/ lower dia of required dia of steel. Let us calculate. Suppose we do not have 12mm at site. So we have to go for higher dia or lower dia of 12mm for our site progress. We choose 10mm as re-place bar. Question- If 12mm dia having spacing 100mm c/c, then what is the spacing for 10mm dia ? Solution Formula – (Area of available dia/ Area of un-available dia) × Given spacing         Area of 12mm bar = (π/4) × square of dia          (3.14/4) * 12 *12 = 113.097         Area of 10mm bar = (π/4) × square of dia          (3.14/4) × 10 * 10 = 78.539 According to formula = (78.539/ 113.097) × 100                   = (0.6944 × 100) = 69.44mm or say 70mm PLEASE SUBSCRIBE MY SITE AND COMMENTS ABOUT THE CONTENT.THANK YOU

How to calculate of concrete weight?????? Standard unit for concrete :- P.C.C - 2400 KG/CUM R.C.C - 2500 KG/CUM Weight of p.c.c concrete ???? *****Quantity of concrete - 5 CUM          Weight - standard unit * cum                          2400*5 = 12000 KG Weight of R.c.c concrete ???? *****Quantity of concrete - 5 CUM          Weight - standard unit * cum                          2500*5 = 12500 KG PLEASE SUBSCRIBE MY SITE AND COMMENTS ABOUT THE CONTENT.THANK YOU

How to calculate weight of steel at site ? Formula - ( D*D/162 )* R.M.L D= dia of bar R.M.L = running meter length of steel   Example- Suppose we are having 8mm steel & we have to calculate the weight of 8mm steel having length of  1 meter. Solution- ( D*D/162 )* R.M.L ( 8 * 8/162 )* 1 ( 64/162 )*1 0.395 * 1 = 0.395 KG or 395gm Always take answer value in KG PLEASE SUBSCRIBE MY SITE AND COMMENTS ABOUT THE CONTENT.THANK YOU