Category Archives: buildings

BOX FOOTING…SO MANY BARS ?

Dear Friends ,

Now let us do one exercise on Box footing.

This is the exercise for you !

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This is the sketch for your reference :

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Now try to calculate the Cutting length for each of the bars and calculate the weight of the re-bars.

After you have done your work , just verify your answer with the solution given below.

All the best !

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HAT-TRICK OF ESTIMATION

FRIENDS ,

You deserve a vote of THANKS for your great contributions.

Look at this :

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Your blog has again created a new record of 532 Views on 10th March 2016.

Today , we are going to do a new estimate.

This is also being done in FPS units for the purpose of practice.

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Now let us start the estimate.

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Now you shall need the formula for the trapezoidal portion :

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Now its time to prepare an Abstract of all items :

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My God..You are Cranked !

Friends ,

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You shall certainly feel that I have become cranked after seeing this post which is again on Bar bending schedule. But this time , we are going to learn how to calculate the cutting length of the BENT UP BAR which is also known as CRANKED BAR  

[ By the way , this is sometimes referred as the Flexural steel ].

The following example shall give you clarity on the Bent up bars.

But before we take up the example, let me give you a simple formula for calculating the cutting length of the bent up bar.

By this time, you already know that in Beam , there are 2 bent ups per bar whereas in a slab , there is only one bent up per bar.

Just see the following sketch :

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Now write down the following formula :

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Some students have asked me what is the logic behind this factor 0.41 H.

The logic can be found by applying the famous right angle formula by Pythagoras.

Still if you are not able to find out , we shall study in a separate article. OK ?

Now , let us solve the following question using this formula :

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Try to find out the cutting length YOURSELVES through the application of the formula.

Check your answer in the following sheet :

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Hope you have enjoyed this exercise.

Thank you !

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Form work for Curved beams

Curved beams :

Prologue :

The centering and shuttering of the curved beams does provide a different challenge as compared to the normal beams. This article attempts to identify the key steps in undertaking the curved beam form work with prefection.

Types of curved beams :
There could be two types of curved beams :
1. Curved in plan :
This could be either a circular beam or a arc beam either for the water tank or for the roof of a building.
2.Curved in elevation:
Mostly for the ornamental window lintels which are arch shaped beams.
3.Composite ( curved in Plan and elevation both ): Very typical folded structure which is circular in plan and also undulating in level on the circumference.