Tag Archives: RCC

Footings : Levelling Course & Water Logging :

Dear Friends ,

Let us solve the query of one of the readers today.

This is the query :

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In fact , there are two queries here :

  1. When do we use Plain Concrete in a footing ?
  2. Ground Water seepage during excavation ?

Let us solve these queries one by one.

First query is about the Plain cement Concrete .

Please have a look at the section of the Footing as given in the RCC drawing :

The PCC is marked here with Red :

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Now have a look at the base of a pit . This is how the surface shall be at the base of the excavation :

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It shall be very clumsy to lay the rebars on such a muddy surface. Right ? Thats why we provide a certain thickness of plain cement concrete here . This concrete is also known as the ” LEVELLING COURSE “.

So the Levelling course is a layer of Plain cement concrete which is given so that we get a good working surface for laying the footing properly. 

Now have a look at the leveling course laid on a site :

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Next step is to lay the Rebars of the Footings :

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Parallely , the shuttering for the footing is also fixed on the Levelling course.

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Now we do casting of the Footing so that it becomes the RCC footing .

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Hope the first query is clarified.

Now second query pertains to the Water logging during excavation.

You can have a condition like this on the site :

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So what do we do in such a case ?

Simple.

We have dewatering pumps and take out the water before laying the Levelling course :

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There might be a case like this also :

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So now , may be we shall have to wait for a dry spell so that this water either gets absorbed in the soil below or is evaporated.

In a situation , when the excavated pit is not completely dried, it shall not be possible to lay the plain cement concrete in the mud.

What do we do then ?

In such a case , we shall have to do Boulder solling so that we get a good ,

solid working surface .

Look at the stake of Boulders which are also known as Rubble or Stone :

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These boulders , when laid in the base of a pit , shall look like this :

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After this , the levelling course is laid in plain cement concrete. This is followed by the RCC footing.

Hope both the queries are clarified now.

Thank you for asking the queries .

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Bar Bending Schedule for a RCC Beam

Hello Friends ,

Can you calculate the no of stirrups in this beam ?

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Here is the actual example for you !

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What is your answer ?

How many rings you have calculated in the entire beam ?

Oh.

You need a solution ?

Fine. Here is the solution :

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Thank you so much

Really?  On line course? 

Hi Friends ,

Good Morning !

Hope you are all enjoying the season !

Have a look at this .

CATALOGUE.OLC.17.03.17. (1)

Look what the students of this course have to say :

One student expressed his joy :

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Another student :

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Look at why the students are joining this online course :

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Some other reactions :

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Another update :

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So, friends …what are you waiting for ?

You can receive  a sample Audio Visual PPT from me by mail so that you can have a feel of how the actual teaching takes place. Also let me know which is your preferred language .

The PPT slides are in English but the commentary can be either in English or Hindi or in Marathi . So that you can easily understand .

Write to me today itself .

You can use the form here for faster communication :

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Examples of Rebars for you

Hello Friends ,

Good Morning !

You must have seen a RCC beam where the rings are not at uniform spacing.

In the middle span [ L/2 ] , the rings are at a normal spacing. But in the end spans , the spacing is reduced. This article shows how to calculate the no of rings in such a case. In a simple way. Read on ….

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Let us also see, how is the strength in ribbed bar is exactly double from the strength in Mild steel ( Round ) bars.

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WHAT ? COST FOR A MATT ?

Good Afternoon Friends ,

Wish you all a very CONSTRUCTIVE NEW YEAR 2017.

We are meeting for the first time in this new year.

Here is an interesting question for you !

First try your hand on this and when solved, look at the solution given below .

Best of luck !

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