Enter Main and distribution steel diameter in Excel Sheet. Extra Bars:- The extra bar is provided at the bottom of Cranked bars to maintain the framework of the slab. Reinforced concrete slab is very important element to make a building. Enter the length. Calculate Optimal Rebar Spacing and Weight for Concrete Slabs. There for I am skipping the calculation part. Calculation of slab reinforcement steel quantity with simple excel sheet This simple excel sheet will help you in calculation of quantity of reinforcement steel required for slabs, just put the basic details as shown in above figure, it will calculate the steel quantity and show you in a table which you can print and file it for record. Interactive Scaled Diagrams - Inch Calculate the amount of rebar reinforcement needed for slabs and drive ways. Approx Steel requirement = 1 x 7850 x 1% = 78.5 Kg/m3. For Pythagoras Theorem L1= (√R2 – H12)2 H1, H2, H3 =Spacing Of Reinforcement. Main bars of 12 mm and cross bars of 10 mm are applied in the slab. Charpy Impact Test – Energy Absorption of Metal. For ribbed slab, perform the bending calculation and choose the reinforcement (Load on each rib. How to Calculate Staircase Concrete Quantity? Derivation of D2/162 in Steel Weight Calculation. Distribution bar = 8 mm @ 130 mm c/c. of bars Calculate the number of bar required in both main and distribution bar. Interior floor slabs are usually not subjected Bala is a Planning & QS Engineer working at Megha Engineering & Infrastructure Limited. Pd=9.5 kN/m) (10p) b. Formula = ( Total length – clear cover)/c/c spacing +1 Circular slabs are used in the following areas. Note here we are dealing with a simple manhole cover for calculation purposes; we have taken greater value as the diameter of the slab. L2= (√R2 – H22)2 R = Radius Of Slab ( Excluding Nominal Slab ) … If you can get 20' long bars the total length of your slab can be 20'. Note – We need to calculate the Typical L’s for the 1 st half only, for the 2 nd half we will multiply it by 2 excluding the main bar.. Circular Slab Reinforcement Calculation. (inches) Enter a … Solution, Given that; Length = 6 m. Width = 2.5 m. Main bar = 12 mm @ 100 mm c/c. Following the process, you can easily calculate the quantity of steel required for any type of slab. The length of Extra bar is L/4. This type of slabs is supported on columns and beams. (feet + inches) Enter the width. Select either the Theoretical (required) reinforcement layout located in the RC slabs design or Design > Required reinforcement of RC slabs/walls - options > Calculations to evaluate the reinforcement area for plates or shells. Where, D = Depth of Slab- Top cover – Bottom cover. Minimum reinforcement is 0.12% for HYSD bars and 0.15% for mild steel bars. The reinforcement is generally taken as 1% of the volume of concrete. Save my name, email, and website in this browser for the next time I comment. First, calculate the number of bars required (main and distribution both). One-way solid slabs are designed as rectangular sections subjected to shear and moment. In practice, the circular slab of 3m diameter may have detailed reinforcement. The thickness of concrete slabs depends on loads and size. TILES ON FLOOR SLAB = 0.02 X 23 = 0.35 KN/m2 3.25. minimum thickness of RCC slabs is 6 inches. FORMULA = ( Total length – Clear cover )/ center to center spacing + 1 Main bar = (5000 – (25+25))/100 + 1 SLAB SOFFIT RENDERING = 0.03 X 20 = 0.5 KN/m2 3.15 4.19. For This Cause Using Pythagoras Theorem To Find Out The Length Of Each Reinforcement. No. The calculation for distribution bar for circular slab reinforcement will be exact same as main reinforcement. RCC stand for reinforced concrete. Enter Cover Details. For example, if the slab is 10′ x 10′ and the clearance is 3″, the size of the rebar grid will be 9′ 6″ x 9′ 6″. Subtract the clearance from the length and width to find the dimensions of the grid. I have given an example for the calculation of the quantity steel rod in slab below. So, let’s learn the process of… Rebar Calculation For Slab In a building construction project, we need to calculate the quantity of slab reinforcement for […] Assume you have to prepare a bar bending schedule for a circular slab of 3 metre diameter with 12mm main & distribution bars with 200mm spacing; concrete cover of 25mm. The slab should be strong enough to bear the required load according to design. The use of this calculator depends on the maximum length you can get your bars. He is the author, editor of Civil Planets. The Calculation. The slab should be provided steel bars to withheld tensile force, so this slab is called the RCC slab. Whereas in one-way slab the reinforcement is provided in one direction as it carries load in … Fig. L= Diameter Of Slab – Nominal Cover. Unlike one way slabs, circular slabs are subjected to bending moments in both directions. Reinforced concrete (R.C.) slabs are plate elements used to form the floors of buildings. For example, if a volume of concrete 1 m3 for a slab. Take out the guesswork, and the “she’ll be right” approach knowing how much mesh you need in your slab with a simple formula. of bars= (Slab length (S)/spacing)+1 Equation 2. In a typical reinforced concrete building, reinforcement bars arranged as mats are incorporated into a concrete plate of minimum thickness 125 mm to form a reinforced concrete solid slab. The only formula you need to remember for the entire calculation is, From the above diagram, We can calculate the value of L, L = Diameter of Circular Slab – Concrete Cover on both sides = 3000-(2*25) = 2950 mm or 2.95 m, Radius of the slab = (Diameter of the slab – concrete cover on both sides ) / 2 = 2950/2 = 1475 mm or 1.475m, Number of L Bars = (Diameter of the slab – concrete cover on both sides)/Spacing = 1475/200 = 7.375 or 7 Nos, Apart from the Centre Rod (L), we need 3 more bars on both sides such as L1, L2, L3, For L = √(R2 – h12) x 2 where h1 = distance between L & L1 or spacing of bars – 200 mm, Therefore, L1 = √(R2 – h12) x 2 =  √((1475)2 – (200)2)x2 = 2066.7 mm, L2 = √(R2 – h22) x 2= √((1475)2 – (400)2) x 2 = 2007.8 mm, L3 = √(R2 – h32) x 2= √((1475)2 – (600)2) x 2 = 1905.58 mm. (Convert Inches to feet) Enter the Thickness of the slab in mm only. the amount the waste factor will add in lineal feet. Thickness of the slab is decided based on span to depth ratio specified in IS456-2000. The materials to be used are grade C25 concrete and grade 500 reinforcement. RCC Column T =range of temperature the slab is expected to be subjected to (F o) ∝∝∝∝ = thermal coefficient of concrete (in/in F o) Es = modulus of elasticity of steel (psi) The normal range of the coefficient of thermal expansion of concrete ( ∝) is 5 to 7 x 10-6. It assumed in this calculator that they are the same. Read also: Reinforced concrete design to Eurocode 2. If you can get 40' long bars the total length of your slab can be 40'. The slab has to carry a distributed permanent action of 1.0 kN/m2(excluding slab self- weight) and a variable action of 3.0 kN/m2. The slab is outside buildings which subjected to 1 hr fire resistance and design for 50 years design life. We have discussed Bar Bending Schedule for different structural members such as, Here we are going to discuss the Bar Bending Schedule for Circular Slab, Circular slabs are not usually common like flat rectangular slabs that we use almost every floor. LEARN MORE For ribbed slab, make the calculation of shear and choose shear reinforcement. 1. If you can get 60' long bars the total length of your slab can be 60'. PARTITION ALLOWANCE = 1.0 KN/m2. Mass of reinforcement= density*volume. RCC Slab. The calculation of One Way Slab Reinforcement Details Design is extremely tedious and time-consuming and after give more time is not 100% sure that design is best or not and also if some minor change comes in design if force to calculate full design step again and again . Example calculation: Steel quantity = Volume of Concrete x Density of Steel x % of Steel. 1: Types and arrangement of steel bars in one way slab. Reinforcement Calculation for Circular Slab, Step 2 – Find the Number of (L) Bars required, Step 4 – Bar Bending Schedule Format – Circular Slab, A room specifically designed for circular slab, ) x 2 where h1 = distance between L & L1 or spacing of bars – 200 mm, The circular slab has reinforcement on both sides, so the. This is needed to determine both the lengths of the rebar and how many rows and columns are needed. https://civilplanets.com/circular-slab-reinforcement-calculation 1.1: Load transfer in (a) One-way slab, (b) Two-way Slab (Nilson) Fig. (inches), Enter a waste factor, if required. (percentage). Thickness = 150 mm. This is a step by step process of rebar calculation for a slab. The modulus of elasticity (E s) of reinforcing bars is generally taken as 29 x 106 psi. In equation 1, center to center spacing of main reinforcement steel bars are used and shrinkage and temperature bar spacing is used in equation 2. Concrete Structures & Design Sessional I One Way Slab Design Submitted To: Mr. Meraj Rubayat Kamal Md. SELFWEIGHT OF SLAB = 0.18 X 24 = 4.2 KN/m2. Step -1 : Calculation of no. Fig. Clear cover = 30 mm From top to bottom. Pounds per Cubic Yards / Pounds per Cubic Foot, Concrete Cost from a Price per Cubic Yard, Convert Cubic Feet to Cubic Yards and Metres, Enter the required splice (overlap) of your bars. OTHER FINISHES ASUMED = 0.45 KN/m2. Only the Calculations option is active which may be performed using either the equivalent stiffness (elastic) or the stiffness update (inelastic) methods. Splitting the slab into two parts for easy calculation. Design of reinforced concrete structures(one way slab)+with calculation. Of reinforcement MORE example calculation: steel quantity = volume of concrete this browser for the calculation of shear moment... Rendering = 0.03 x 20 = 0.5 KN/m2 3.15 4.19 details let it … slab reinforcement slab... 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