Category Archives: bent up bar

BENT UP BAR IN CONTINUOUS SLAB ?

Dear Friends ,

Let us give a big hand to the readers who joined recently to this blog.

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Today we shall understand how to calculate the cutting length for a bent up bar in a continuous slab. 

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Before calculations , let us understand the scheme :

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ONE WAY SLAB…RE BARS CALCULATIONS…MADE EASY

Hi ,

Every one reading this post !

Welcome !

Dear 467th Follower to this blog.

Today , we are going to analyze and solve one complete RCC slab.

We shall study the RCC drawing and find out the re bar weight .

We are going to take a visual method today which we are sure you shall really enjoy.

Here is the case for you !

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OH..NO..ANOTHER SLAB ?

Dear Friends ,

Let us first greet the NEWLY JOINED members on our blog.

This is another example of an One way slab for you.

You can also Refer to the previous posts for RCC slabs. RCC slab  

Ready ?

let us start .

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We are referring to the slab between columns C11, C12 ,C2 & C3 :

DETAILS.OF.SLAB.CHART

DETAILS.OF.SLAB

For  finding out the slab dimensions , you shall have to refer to the architectural plan .

This is the  relevant portion :

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We have assumed that the wall thickness shall be 100 mm.

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For the calculations of the bent up bars , you may like to refer to the detailed posts on bent up bars :

BENT UP BARS 01

BENT UP BARS 02

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MUST BE A ONE WAY SLAB..RIGHT ?

Dear friends ,

There was a request from one of our followers to post some content on slabs.

This exercise shall help you understand the One way slab.

How to read details from the RCC drawing and then how to convert this information into the meaningful Bar binding schedule.

Read on….

This is how the problem shall be defined :

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CRANKED BAR ? SURE….

Dear Readers ,

This is another solved example for the BENT UP bars.

You must have read the earlier post on bent up bars.

Cranked Bars 

There was yet another post on Bent up bars ;

Bent up bars 

In the following article , you shall find a simplified formula for calculating the cutting length of the bent up bars.

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Let us also revise some basic concepts about CURTAIL BARS and EOS bars.

Refer to the post :

RCC Beam :

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This is BBS ..dear !

Friends ,

The Structure of a building is in Reinforced Cement Concrete.

The steel bars provided in the concrete make it strong to carry the tensile forces.

Thses bars are called as REINFORCEMENT.

The detailing of these bars [ Diameter ,spacing,covers, laps , dowel lengths, development lengths and shapes } are provided by RCC designer and are specified in the RCC drawing.

The extract of the steel reinforcement in the form of a table is known as Bar bending Schedule. The tabulation of the reinforcement details can be conviniently done using the MS Excel.

Professional contracting firms have got printed formats for BBS ready for the use of their staff. The BBS is prepared by the Qauntity Surveyors during estimation . The BBS is also prepared by the Site Engineers for controlling the quality of the Reinforcement Bars at site. The BBS is also an excellent tool for recording the measurements of the Reinforcement bars at site and the BBS can also be used to submit the Bills for the Reinf..bars.

This is a chart which basically gives the micro details about the various bars. This gives the dia, shape of bar , cutting length of the various bars in a RCC element such as Footing, column , beam ,slab etc.

The site engineer prepares the BBS based on the drawing and after due verification , hands it over to the reinforcement fitter.

By the use of BBS , the weight of the Re-bars can be easily calculated.

Let me explain you this popular tool with an example.

Imagine , there is a beam of the following cross section.

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CROSS SECTION OF A RCC BEAM

The details of the reinforcement have been tabulated in the following table :

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The cutting lengths of each bar is calculated and tabulated as follows :

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But you can see that many details are missing from this abstract. Hence , a better tabulation , known as the BBS has been prepared which gives each details of the Re-bar in a crystal clear method :

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The bar bending gives a very clear picture of the reinforcement.

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BEAM BARS AGAIN

Dear friends ,

This is another example for your practice.

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Now based on the earlier practice , try to find out the weight of the Rebars for this RCC beam.

Once you are ready , check your answer with  the solution here.

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Congratulations for your correct answer.

Bye Friends !