# Tie beam foundation Difference between plinth beam and tie beam, Tie beam meaning

In this lecture we are going to discuss about tie beams, the various advantages of providing tie beams and the difference between tie beam and plinth beam. At the end. I am going to show you how to do the quantity calculation for tie beam before starting this lecture. If you haven't subscribed my channel, please subscribe it and don't forget to press the bell icon so that you don't miss any updates in future.

# What is Plinth Beam?

Now lets start with our today's topic. The beam which connects to our more structural members to make the structure more stiff and stable is called as Tie beam.

Tie beams are provided both in superstructure as well as in substructure. These are mainly provided in roof Truss and at plinth level and footing level. Tie beam sometimes works as a strap beam.

To take all the stresses due to column eccentricity on footing. The various advantages of providing tie beams can be summarized as Tie beams carry axial compression.

These beams can prevent columns from buckling. They provide connection between column footings. They can hold the longitudinal bars together while placing the concrete and tie beams keep the footings in position.

During seismic events, now the difference between tie beam and plinth beam. Before knowing about the difference between tie beam and plinth beam, we must know what is plinth level. It is the level where substructure ends and superstructure starts. In simple words, it is the topmost level of ground. The beam which is provided at the plinth level is known as plinth beam.

## The Drawing Needs to Read

This is the first beam constructed after the completion of foundation. If we talk about the difference between tie beam and length beam, there is actually no difference between them. Plinth beam is also a type of tie beam.

When the tie beam is provided at plinth level, it is known as plinth beam, which means the only difference is the height at which they are provided.

Length beam is only provided at length level but tie beam is provided anywhere above or below the floor level.

Let's consider a tie beam of length 3.45 meter whose width and depth be equal to 0.3 meter. To calculate the quantity of, we need to calculate the volume of concrete which will be equal to length that is 3.45 into width which is 0.3 meter into depth.

Which is also 0.3 meter. So volume of concrete will be equal to 0.31 meter cube. This volume is the wet volume of concrete so we need to convert it to dry volume to know the exact quantities required. As I have already shown you in my previous lectures, dry volume is equal to wet volume into conversion factor 1.54.

Wet volume is already calculated as 0.31 meter cube. So dry volume will be equal to 0.311.5 which will be equal to 0.477 meter cube. To calculate the quantity of cement, sand and aggregate, we need to follow the similar procedure as we have been doing in our previous lectures.

The shattering area for this tie beam will be equal to two times its length into depth, which will be equal to twice 3.45 into 0.3. So shattering area will be equal to 2.07 meter square.

The bitmen paint area will be equal to surface area of this side and the side opposite to it plus surface area of its top end. So the paint area will be equal to twice length into depth.

Length Width. On subshooting these values we will get bitmen paint area equal to 3.11 meter square. So this was all about this lecture. If you like my content, please subscribe my channel and don't forget to press the bell icon so that you don't miss any updates in future. Thank you.