Bar Bending Schedule (BBS) of Staircase | Calculation & Example Explained

Floor Height= 300mm
Riser= 260mm
Tread= 260mm
Width=1100mm

No. Of Risers= $3000/150$ = 20 no’s

For one Flight= 10no’s

No. of Tread= 10-1=9

Bar Bending Schedule (BBS) of Staircase | Calculation & Example Explained

Cutting Length of Main Bar

(300-25) + (2702) + (1100-260) + (250-25) + (300-165-25+20) – (2 x 1 x 12) – (1 x 2 x 12)

= 4124mm

2 x 1 x 12 – (No. x 1D 45deg)
1 x 2 x 12 – (No x 2D 90 deg)

2. Cutting Length of Top Extra (Part-A)

(300-25) + (0.3 x L.W.S) – (1 x 2 x 12)

= 1073.6

1 x 2 x 12 – (No x 2D 90 deg)

3. Cutting Length of Top Extra (Part-B)

(0.3 x L.W.S) + (1100 – 260) + (250 – 25) + (300 -25 – 25) – (1 x 1 x D) – (1 x 2 x D)

= 2113.6mm

1 x 1 x D – (No. x 1D 45deg)
1 x 2 x D – (No x 2D 90 deg)

4. Cutting Length of Distribution Bar in Waist Slab

(1075 – 20 – 20) = 1035mm

5. Cutting Length of Distribution Bar in Landing

(2200 – 20 – 20) = 2160 mm

6. No’s of Main Bar

$1035/150 + 1$ = 7.9 = 8 No’s

7. No’s of Top Extra

Part-1 = 8 No’s
Part-1 = 8 No’s
Both are same

8. No. of distribution Bar at Waist Slab in Bottom

$2702/150 + 1$ = 20 No’s

9. No. of Distribution Bar at Waist Slab in Top

$(0.3 x 2702)/150 + 1$ = 7

for both part A & part B = 7 x 2 = 14 No’s

10. No of Distribution Bar at Landing

$(1100-260)/150 + 1$ = 7 No’s

for top & Bottom = 7 X 2 = 14 No’s

Bar Bending Schedule (BBS) of Staircase | Calculation & Example Explained

Also Read: –

Foundation Guidelines Types, Requirements, and Depth Criteria (IS 1904 Explained):- https://engineerlatest.com/foundation-guidelines-types-requirements-and-depth-criteria-is-1904-explained/
Pile Foundations, Different Types, and Their Applications:- https://engineerlatest.com/pile-foundations-different-types-and-their-applications/
Types of Foundation and Construction Process:- https://engineerlatest.com/types-of-foundation-and-construction-process/
How to Calculate the Size of the footing:- https://engineerlatest.com/how-to-calculate-the-size-of-the-footing/
How to decide beam size:- https://engineerlatest.com/how-to-decide-beam-size/
Footings and Foundations Explained: Types, Functions, and IS 456 Guidelines:- https://engineerlatest.com/footings-and-foundations-explained/