General Guidelines to be Followed In Preparing BBS:

• The bars should be grouped together for each structural unit, e.g., beam, etc.
• In a building structure, the bars should be listed floor by floor
• For cutting and bending purposes, schedules should be provided as separate A4 sheets and not as part of the detailed reinforcement drawings.
• The form of bar and fabric schedule and the shapes of the bar used should be in accordance with BS 8666.
• It is preferable that bars should be listed in the schedule in numerical order.
• It is essential that the bar mark reference on the label attached to a bundle of bars refers uniquely to a particular group or set of bars of defined length, size, shape, and type used on the job.
• This is imperative as a bar mark reference can then point to a class of bar characteristics. Also, this helps steel fixers and laborers keep track of the type and number of bars needed to complete a certain work.

Bar Bending Schedule Required Ment Data

1. Plan, Elevation & Section 

2. Structural Detail (Slab & Beam)

3. All Dimensions Must be Clear and Co-Related.

How to Prepare a Slab BBS? 

1. Slab Beam.
2. Slab.

Slab Beam Bar Bending Schedule 

Numbers of Bars for Stirrups 

Stirrups Cutting Length

Cutting Length Bar:

Slab Bar Bending Schedule Excel Sheet

How to Calculate Slab Steel Quantity from Drawing Excel Sheet

Bar Bending Schedule for Slab

Steel Calculations

• Weight of bar in kg/meter should be calculated as (d2 ÷ 162) where'd' is the diameter of bar in mm.
• 'L' for column main steel in footing should be considered as minimum 30cm/as specified.
• For bent up bar add 0.42d in a straight length of the bar where'd' is the clear depth of beam/slab.

Steel Quantity Calculation

1. (Calculation of bars no’s): first, calculate the number of bars required (main and distribution both). Formula = (total length – clear cover)/center to center spacing + 1 main bar, = (5000 – (25+25))/100 + 1, = 4950 divided by 100 + 1, = 51 bars., distribution bar = (2000 – (25+25))/125 + 1, = 1950 divided by 125 + 1, = 17 bars.
2. (Cutting length) main bar: formula = (l) + (2 x ld) + (1 x 0.42d) – (2 x 1d), where l = clear span of the slab, ld = development length which is 40 d (where d is diameter of bar), 0.42d = inclined length (bend length), 1d = 45° bends (d is diameter of bar) first calculate the length of “d“. D = (thickness) – 2 (clear cover at top, bottom) – diameter of the bar, = 150 – 2(25) -12, d = 88 mm ans, by putting values: cutting length = 2000 + (2 x 40 x 12) + (1 x 0.42 x 88) – (2 x 1 x 12), cutting length = 2000 + 960 + 36.96 – 24, =2972.96 mm ~ 2973 mm or 2.973 m.
3. (Cutting length) Distribution bar: formula = clear span + (2 x development length (ld)), = 5000 + (2 x 40 x 8),  = 5640 mm or 5.64 m
4. (Steel Quantity Calculation) Conclusion:
   1. Main bar nos = numbers 51, main bar length = length (51 x 2.973 m) = 151.623 m, main bar weight = weight (d^2/162) x length = 134.776 kg.
   2. Distribution bar nos = numbers 17, distribution bar  length= length (17 x 5.64 m) = 95.88 m, distribution bar  weight = weight (d^2/162) x length = 37.87 kg.

How to Calculate Steel Weight?

Steel Quantity Calculation

Bar Bending Schedule Formulas

• Length of B1 = clear distance between walls + 2 x width of walls – 2 x bar cover + 2 x bend length.
• Length of bar B2: A + B + C = 4000 + 2 x 230 – 2 x 40 + (1.414xH – H)
• B2 = 4000 + 2 x 230 – 2 x 40 + (1.414×334 – 334) = 4518.3 = 4520mm.

How to Calculate Steel Quantity for Slab?

What Is Bar Bending Schedule?

How to Calculate Steel Quantity?

Slab Steel Calculation

Steel Quantity Calculation Formula

Steel Quantity Formula

Slab Reinforcement Calculation

Steel Quantity Calculation Excel Sheet

• Determine the total length of steel bars required for the structure.
• Calculate the weight of steel required based on the length and the diameter of the bars.
• Multiply the weight of steel by the number of bars required.

Steel Calculator for Slab

• Length of the slab
• Width of the slab
• Depth of the slab
• Concrete grade (usually specified as a number followed by "MPa", e.g. 25MPa)
• Spacing of the bars (center to center distance)
• Diameter of the bars
• Total number of bars in both directions (i.e. for top and bottom layers)

How to Calculate Steel Quantity Pdf?

• Compute number of steel bars. Main Steel Bars. No. of bars= (Slab length(L)/spacing)+1 Equation 1.
• Calculate cutting length:
• calculate the required number of bars for both directions. No. of bars = {(L or w – concrete cover for both sides) ÷ spacing} +1 Equation 8.

Number of Bars Formula

• Area of Steel Required: The cross-sectional area of steel reinforcement required to meet the design specifications of the structural element, typically expressed in square millimeters (mm²) or square inches (in²).
• Area of One Bar: The cross-sectional area of a single bar of the specified diameter, typically expressed in square millimeters (mm²) or square inches (in²).

No of Bars Formula

• Total cross-sectional area of steel required: The total area of steel reinforcement required to meet the design specifications of the structural element, typically expressed in square millimeters (mm²) or square inches (in²).
• Cross-sectional area of one bar: The cross-sectional area of a single bar of the specified diameter, typically expressed in square millimeters (mm²) or square inches (in²).

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