How is bar bending schedule calculated for slab?
Steps to calculate the Reinforcement required for Slab:-
- Deduct the cover for finding length of bar.
- Evaluate the length of the distribution bar.
- Calculate the Value of ‘D’ (Depth of slab- Top cover- Bottom cover)
- Find out the No. of Bars.
- Compute the Total wt of steel required for slab reinforcement.
How do you calculate the length of a bar bending schedule?
Example of Beam Reinforcement Calculation:
- 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.
What is bar bending scheduling?
Bar Bending Schedule (BBS) is basically the representation of bend shapes and cut length of bars as per structure drawings. BBS is prepared from construction drawings. For each member separate BBS is prepared because bars are bended in various shapes depending on the shape of member.
How do you calculate bars for a slab?
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.
How do you calculate concrete for a circular slab?
Calculator Use
- Choose Round Column (or Round Slab) on the calculator.
- Enter Height 4 ft (or 48 in)
- Enter Diameter 10 in.
- Calculate and the answer is 0.08 cubic yards for one concrete tube.
- Multiply 0.08 x 50 = 4 total cubic yards of concrete for 50 tubes.
Who prepares a bar bending schedule?
Bar Bending Schedule is used by the:
- Detailer.
- person checking the drawing.
- contractor who orders the reinforcement.
- organization responsible for fabricating the reinforcement.
- steel fixer.
- clerk of works or other inspector.
- the quantity surveyor.
How are bar schedules calculated?
Hence to withstand tensional stresses, steel is need in concrete. The reinforcement in concrete may be simple bars or rods bend and tied to a given schedule with stirrups….Preparing Bar schedule manualy.
| Nominal Diameter of the bar (mm) | Unit weight (kg/m) |
|---|---|
| T16 | 1.580 |
| T20 | 2.469 |
| T25 | 3.858 |
| T32 | 6.313 |
How to calculate bar bending schedule of slab?
Bar Bending Schedule Of Two Way Slab: Step 1: For Section A-A. Calculate number of bars required for main bars and distribution bars. No. of bars = Length of slab/spacing + 1. Total No. of bars = Ly/150 +1 = 4000/150 +1 = 27. No. of main bars = 14. No. of distribution bars = 13. Step 2: Calculate cutting length of main bars and distribution bars.
When to use a bar bending schedule ( BBS )?
Steel fixer using bar bending schedule (BBS) for doing their work or installing the bar in column, beam or slab according to the bar bending schedule (BBS) that how much cut length or bending of bar will be needed and which size of steel should be use.
How to calculate the cutting length of a slab?
Calculate number of bars required for main bars and distribution bars. Calculate cutting length of main bars and distribution bars. Cutting length of main bar = Clear span of slab + (2 x development length) + Inclined length – (Bend length) Inclined length 0.42d Where d = diameter of bar.
What are the shear and bending moments of a slab?
If you see the shear force and bending moment diagram, the slab has high moments at center and less at ends. The shear force is maximum at the ends while at the center shear force is zero or minimum. Use less cutting of steel and provide desirable lapping. Lap another steels at same time. Don’t Overlap at the same position/ place.