# Online Design of T-Beam, Reinforced Concrete Design in one Click Online.

Reinforced Concrete Floor systems normally consist of slabs and beams that are placed monolithic-ally. As a result, the two parts act together to resist loads. In effect, the beams have extra width’s on their tops, called flanges and the resulting T-shaped beams are called T-beams. The part of a T Beam below the slab is referred to as the web or stem. The beams may be L-Shaped if the stem is at the end of the slab.
In this particular post I will be sharing with you a very attractive and ready to use T-Beam Designer v1.1. It is a simple JavaScript code containing all the programming that is needed to design the T-beam, You only have to put the inputs as mentioned at the top and then just hit the calculate button, it will show each step-by-step calculation involved in the design of T-beam and then show you the results as well as the final cross-section diagram.

## What is T-Beam Designer

It is a complete Designer of T-Beam flexural and shear design programmed on JavaScript. It will help you in designing of T-Beam. T-Beam Designer not only give you the results but also shows you the calculation step-by-step involved in the Design of T-Beam.

It is a simple one click program, you just have to enter or input some values and after clicking one button you will get your design as desired.
 T-Beam location and plan Layout

## Steps for the Design of T-Beam

Step # 1 Calculating / Estimating Beam Dimensions
Step # 2 Calculating the factored load and factored moment
Step # 3 Calculating Effective Flange Width;
Step # 4 Calculating Moments
Step # 5 Assuming a Lever Arm
Step # 6 Trial Steel Area;
Step # 7 Calculating and checking the value of a and z ;
Step # 8 Checking Minimum Reinforcing ;
Step # 9 Checking values of ε t and Φ

Do You Know?

Lim, Paramasivam, and Lee (1987) discuss the problem of shear stress leading to failures of flanges detaching from webs when under load. This could prove catastrophic if allowed to occur in real life; hence, the very real need to mitigate that possibility with reinforcement for concrete T-beams.

## How to Use T-Beam Designer V1.1

There are 11 total inputs that you have to give to T-Beam Designer v1.1, which are as under;
 Typical Cross-section of T-Beam

Live load is that which is provided over the slab supported by the concerned T-Beam in units of psf

this dead load is in addition to the load of slab and beam concrete like any other furniter etc. in units of psf

#### Span:

the span of beam is to be given in feet

### Transverse Panel Length,

it is the center-to-center span between two consecutive T-Beams in transverse direction (as shown in the figure)

### Concrete Compressive Strength (fc’):

it is 28 days cylindrical compressive strength in units of psi.

### Steel yeild Strenth (fy):

it is the grade of the steel in unit of psi

### Strength Reduction factor (phi)

it is used to convert the applied moment to nominal design moment.

### Minimum Reinforcement Ratio (Rho min)

it is to be taken from any suitable table by comparing with fc’ and fy

### Type of concrete:

the dimension estimation of the T-beam is also dependent on the type of concrete whether light weight or normal weight.

### Thickness of slab:

it acts as a thickness of flane in units of inches.

### Clear Cover:

it is to be given in order to estimate d from h in units of inches.

 Enter the inputs to the beam designers Enter the Live Load on slab: L.L Psf Enter the attached dead load on slab: D.L Psf Enter the Span of the beam: l ft Enter the slab transverse panel length: lt ft Enter concrete compressive strength: fc’ psi Enter the steel grade: fy psi Assume strength reduction factor: phi Enter the minimum reinforcement ratio: rho min psi by look at the table Type of Concrete Normal Weight (145-150 pcf)Light weight (90-120 pcf) Enter the thickness of slab: hf in clear cover from bottom to steel: c.c in

## Step # 1 Calculating / Estimating Beam Dimensions

From deflection control creteria the dimensions for the beam are estimated as;

Minimum depth of the beam: h = inches;

Width of beam taken as 2/3 of the height or depth; bw= inches

## Step # 2 Calculating the factored load and factored moment

Total Dead load:(DL)t = (Dl)b + (DL)s + attached DL = lb/ft

Total Live load (as given) :(LL)t = lb/ft

Total factored load:Wu = 1.2(D.L) + 1.6 (L.L) = lb/ft

Total Factored Moment: Mu = (Wu)l2/12 = k-ft

## Step # 3 Calculating Effective Flange Width;

Smaller of the following;
(a) span / 4 = in.
(b) bw + 16 hf = in.
(c) transverse panel length * 12 = in.
thus the effective flange width to be used is; in.

## Step # 4 Moments Assuming Phi = ;

Design Moment = Mn = Mu / phi = k-ft

## Step # 5 Assuming a Lever Arm

Larger of the following:
a) z = 0.9(d) = in
b) z = d – hf/2 = in
Thus z to be used is: z = in

## Step # 6 Trial Steel Area;

Trial Steel Area; As = Mn/(Fy x z) = sq. in.

## Step # 7 Calculating and checking the value of a and z ;

Finding the location of the N.A;

Final Value of Moment arm (z) = in

Final Value of Area of Steel As = sq. in

## Step # 8 Checking Minimum Reinforcing ;

(ρ)min as given =

Area of Steel to be used: As = sq.in.

## Step # 9 Checking values of ε t and Φ

ε t = ((d-c)/c)(0.003) =

Result whether Beam is tension controlled or not;

The final designed beam is as follows; –

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Disclaimer
We are not responsible for the consequences of the result of its usage
Hi there, I am Saad Iqbal from Pakistan. I am an enthusiastic blogger, passionate content creator, construction geek, and a creative graphic designer. Connect with me at my social channels.