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STRUCTURE

Bar Bending Schedule for footings |Estimation of Reinforcement in footings


Bar Bending Schedule for footings / Estimation of Steel reinforcement in footings:-

Bar Bending schedule plays a vital role in the construction of High rise buildings.  It is very important to learn Bar Bending Schedule for finding out the quantities of Steel reinforcement required for every component of the building.

For Suppose, consider the case of high rise buildings, It requires tons of steel to complete 10+ floor building. It’s impossible to order all the steel required for whole construction at a time it creates a problem of space and also steel is prone to corrosion by the contact of water (rain). To avoid this, high rise building orders reinforcement (steel) as per requirement. Firstly they find the Estimation of Steel reinforcement in footings (steel quantities)  [Bar Bending Schedule for footings],  required for the construction of footings. After the completion of footings they go for next order and so on.

 

Contents

  • Quantity of Reinforcement (Steel) required for footings / Bar Bending Schedule for footings:-
  • Footings F1, F4, F7:- (Plain Footings) or Bar Bending Schedule for Plain footings:-
  • Footings F3, F8 (Isolated footings) or Bar Bending Schedule for Isolated footings :- 
  • Footings F2  (Step footings) or Bar Bending Sschedule for Stepped footings:- 
  • Footing F5 (Eccentric footing) or Bar Bending Schedule of Eccentric/Shoe footings :-
  • User Review

Quantity of Reinforcement (Steel) required for footings / Bar Bending Schedule for footings:-

In this post, I am finding out the Estimation of Steel reinforcement in footings / Bar Bending Schedule for footings. For this, I considered a footing plan as below.

Steps for Finding the quantities of Reinforcement in footing:
Step 1: Identify the type of Mesh or Reinforcement
Step 2: Adopt dia of bars (X bars & Y bars)
Step 3: Deduct the Concrete Cover from all sides of footings
Step 4: Find the length of bars (X bars & Y bars)
Step 5: Find the No. of Bars
Step 6: Find the total length of bars
Step 7: Result: total wt of bars required for footing

footing plan for reinforcement 

Footing Details:- 

F1, F4, F7 is Plain footing (1.5×1.5×0.8)
F2 is Stepped Footing (0.9×0.9×1.35)
F3,  F8  is Isolated footing (0.9×0.9×0.5)
F5 is Combined Isolated footing (4.4×1.9×0.9)
(In this article I didnt added the details of above footing F5)
F6 is Shoe footing similar to Plain footing (1.5×1.5×0.8)

Bar Bending Schedule for footings

Reinforcement in Combined isolated footing

We use different types of mesh (reinforcement) in footings as per design. You can refer different types of Reinforcement used in footings from here.

Footings F1, F4, F7:- (Plain Footings) or Bar Bending Schedule for Plain footings:-

Plain mesh is adopted for F1, F4, F7 footings 

*Remember, Proper Concrete cover should be adopted for the reinforcement  in Footings to resist it from corrosion.

The dimensions of Footing F1 are 1.0 x 1.0 x 0.9 (Length x Breadth x Depth)

Adopt Dia 16mm @ 100mm  C/C in X Bars

Adopt Dia 12mm @ 100mm C/C in Y bars

Finding the length of X bars and Y bars (X bars are Horizontal bars and Y bars are Vertical Bars)

To find out the length of bars we have to deduct the cover from footing (Refer Fig.1)

As per the condition the concrete cover for the mesh is 0.1 from all the sides of footing

So, The length of X bar is 0.8 and Length of Y bar is 0.8. (Deduct 0.1 from both sides)

Reinforcement in Plain footing

 

Bar Bending Schedule for footings (Plain footing)

 

Footings F3, F8 (Isolated footings) or Bar Bending Schedule for Isolated footings :- 

Hook Mesh is used in Isolated footings

Remember Proper Concrete cover should be adopted for the reinforcement  in Footings to resist it from corrosion.

The dimensions of Footing F3, F8 are 0.9 x 0.9 x 0.5 (Length x Breadth x Depth)

Adopt Dia 16mm @ 100mm  C/C in X Bars

Adopt Dia 12mm @ 90mm C/C in Y bars

Finding the length of X bars and Y bars (X bars are Horizontal bars and Y bars are Vertical Bars)

As per the condition the concrete cover for the mesh is 0.1 from all the sides of footing

So. The length of X bar is 0.7 and Length of Y bar is 0.7. (Deduct 0.1 from both sides)

Remember , Hook length = 9D 

Bar Bending Schedule for footings (Isolated footing)

Length of Bars: –

Length of X bar = L+9D+9D = L+18D = 0.7+18 x 0.016 = 0.988m

Length of Y bar = L+9D+9D = L+18D = 0.7 + 18 x 0.012 = 0.916m

 

Footings F2  (Step footings) or Bar Bending Sschedule for Stepped footings:- 

Hook Mesh is used in Step footing. 

The dimensions of Footing F2 are (0.9×0.9×1.35)

Adopt Dia 16mm @ 110mm  C/C in X Bars

Adopt Dia 20mm @ 115mm C/C in Y bars

Finding the length of X bars and Y bars (X bars are Horizontal bars and Y bars are Vertical Bars)

As per the condition the concrete cover for the mesh is 0.1 from all the sides of footing

So. The length of X bar is 0.7 and Length of Y bar is 0.7. (Deduct 0.1 from both sides)

Remember , Hook length = 9D

Bar Bending Schedule for footings

Length of X bar = L+9D+9D = L+18D = 0.7+18 x 0.016 = 0.988m

Length of Y bar = L+9D+9D = L+18D = 0.7 + 18 x 0.012 = 0.916m

Footing F5 (Eccentric footing) or Bar Bending Schedule of Eccentric/Shoe footings :-

Type of Mesh :- Upto the depth of footing

The dimensions of Footing F5 are (0.6×0.6×0.4)

Adopt Dia 16mm @80mm X Bars

Adopt Dia 16mm @ 80mm in Y bars

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Finding the length of X bars and Y bars (X bars are Horizontal bars and Y bars are Vertical Bars)

As per the condition the concrete cover for the mesh is 0.1 from all the sides of footing

So. The length of X bar is 0.4 and Length of Y bar is 0.4 (Deduct 0.1 from both sides)

Length of X bar = 0.3+0.4+0.3 = 1.0m

Length of Y bar = 0.3+0.4+0.3 = 1.0m

Bar Bending Schedule for footings

 

Bar Bending Schedule for footings

Total Steel Required for Footings = 89.13 + 67.32 = 157Kgs.= 0.157ton

Coming soon estimation steel reinforcement in Columns, Slabs, Septic tank, Water tank. Stay tuned by like’ing us on Facebook

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You can also read:-

10 Types of footings or foundations which we adopt in Construction

16 Different types of slabs in construction 

Different types of Columns in construction

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About The Author

Krishna

Founder & Admin of civilread.com, I am a civil engineer working in Ultratech Cement Ltd. With a good subject knowledge in civil engg i have started this blog to share valuable information to fellow civil engineers. You can also follow me on fb and twitter by clicking below

30 Comments

  1. Amresh Killa

    Well done bro keep going

    September 5, 2017
    • krishna

      Thanks for ur inputs

      September 6, 2017
  2. Varun

    Good job Krishna ji it’s very helpful

    November 14, 2017
  3. Rama

    well done..you made my day…Thanks..hoping to see upcoming detail estimation of slab and beam reinforcement

    November 23, 2017
  4. Rama

    dimension of footing is 1.5×1.5×0.9, but used 1 instead of 1.5,can you pls explain…anyway I appreciate your work.

    November 23, 2017
  5. Md Azharuddin

    Excellent….

    November 28, 2017
  6. Md. Aminul Islam, Dhaka Bangladesh a

    Excellent infformation. Thanks a lots

    January 7, 2018
  7. Farhad

    Excellent information a lot of tnx,I learn a lot of knowledge

    February 3, 2018
  8. Thirugnanam

    Very nice contribution to civil construction.

    February 4, 2018
  9. Ravichandran

    Thanks For Wonderfull Information , keep giving Ideas of Footing and About Pile foundation Details , Can help a lot, Ravichandran p

    February 8, 2018
  10. Mohammed Tausif Moinuddin

    I heartily Thanks for your sir for very good information

    February 8, 2018
    • Krishna

      thanks for ur words! Join our dedicated civil engineers forum let help each other
      link: forum.civilread.com

      February 11, 2018
  11. Reneeja

    I lyk dis site.. Add more

    March 13, 2018
  12. tayyab

    thank you dear for your all information’s stay blessed

    April 15, 2018
  13. Pawan

    Hiii actually I want to know that which size of steel bar is used for footing purpose for g+4

    May 25, 2018
    • Krishna

      it depends on design usually we use 10mm-12mm

      May 30, 2018
  14. Oluwaseun

    Hi Krishna, u’re doing a great job here, keep it up. Please I will like to know the design code or a textbook to consult to get info such as the hook length for footing(9D), weight of 1m steel(D2/162) to reinforced my conviction about what I read here. Thanks

    May 26, 2018
  15. omkar

    Good job ji it’s very helpful

    June 18, 2018
  16. ashok

    i dnt know english pls send in telugu

    June 25, 2018
    • Krishna

      use google translate 🙂

      June 29, 2018
  17. Najeer Khan

    Thanks for informing

    July 27, 2018
  18. Ashok jana

    How to process calculation bar quantity any pile or mat foundation.

    August 1, 2018
    • Krishna

      go through the article clearly

      August 3, 2018
  19. Fousan p

    plane footing cutting length and depth ofstepped footing is wrong pls try to correct it

    September 3, 2018
    • Krishna

      All values mentioned are for understanding the concept and these values cant be used for design purpose.

      September 9, 2018
  20. Aditya

    very Nice Information Thanks Buddy

    September 13, 2018
  21. mohammed

    why r u taking +1 in no of bars in x and y calculation

    February 6, 2019
    • Krishna

      its a formula

      February 7, 2019
  22. ADITHYA LATCHIREDDI

    There is have any deductions in a calculation of cutting length for rebars in any structural units like slabs ,beams columns and footings …if there is any deductions please explain .

    February 13, 2019
    • Krishna

      the deductions and the complete design of slabs, beams , columns are explained clearly here

      https://civilread.com/tag/bar-bending-schedule

      February 13, 2019

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