All about civil construction knowledge- PARAM VISIONS

How to calculate the labor cost for plinth beams?/ Labor rate for the plinth beams.

Let us consider a plinth beam as shown in the below-given drawing.




Given data:

Room size = 2.5m. × 3.5m.

PB1 size = 0.3m ×  0.38m.

PB2 size = 0.3m ×  0.45m.


Before proceeding further, Go through the article👇

👀. How to calculate the cost of plinth beams for a building?


1. Plinth beam concreting:

The labor rate of plinth beam concreting will be between INR 500/- to 900/- per CUM.

Let us take the average rate of INR 700/- per CUM.


The labor cost of plinth beam concreting

= [total vol. of concrete in CUM × rate/CUM.]

=[1.677CUM × 700/-]

INR 1173.90/-

Note: The vol. of concrete is taken from the above-linked article.


2.  Reinforcement:

The labor rate of plinth beam reinforcement work will be between INR 8/- to 14/- per kg.

Let us take the average rate of INR 11/- per kg.


The labor cost of plinth beam reinforcement

= [total wt. of steel in kgs. × labor rate/kg.]

= [ 229 kg. × 11/-]

= INR 2519/-

Note: The wt. of steel is taken from the above-linked article.


3. Formwork:

The labor rate for formwork is decided by the following 2 methods.

a. Labor rate/ sq m of formwork:

The labor rate of plinth beam shuttering work will be between INR 9/- to 15/- per sq ft.

Let us take the average rate of INR 12/- per sq ft.

 or INR 130/- per sq m.


Total length of PB1 = {2nos. × 2.5m.} = 5m.

Total length of PB2 = {2nos. × 4.1m.} = 8.2m.

Total length of plinth beams = length of { PB1 +PB2} = 13.2m.


Shuttering area of PB1

= [( 1no. × bottom side )+ (2nos. × depth side.)] × total length

= [ ( 1no. × 0.3m.  )+ (2nos. × 0.38m.)] × 5m.

= [ 0.3m + 0.76m.] × 5m.

= 1.06m × 5m.

= 5.3 sq m.


Shuttering area of PB2

= [( 1no. × bottom side )+ (2nos. × depth side.)] × total length

= [ ( 1no. × 0.3m.  )+ (2nos. × 0.45m.)] × 8.2m.

= [ 0.3m + 0.9m.] × 8.2m.

= 1.2m × 8.2m.

= 9.84 sq m.


The total area of shuttering work

= [(shuttering area of PB1) + (shuttering area of PB2)]

=[ (5.30 sq m.) + ( 9.84 sq m.)]

15.14 sq m.


The labor cost of plinth beam formwork

= [total area of formwork in sq m. × labor rate/sq m.]

= [ 15.14 sq m. × 130/-]

INR 1968.2/-


Alternate method:

b. Labor rate/ r mt. of formwork:

The labor rate of plinth beam shuttering work will be between INR 11/- to 17/- per RFT.

Let us take the average rate of INR 14/- per RFT.

 or INR 150/- per RMT.


The labor cost of plinth beam formwork

= [total length of formwork in RMT × labor rate/RMT.]

= [ 13.2m. × 150/-]

INR 1980/-

Note: 

The cost calculated by the alternate method ( INR 1980/-) is nearer to the first method ( INR 1968/-)


4. The total labor cost of plinth beam

= cost of [ concreting + reinforcement + formwork]

= [1173.90/- + 2519/- + 1968.20/-]

INR 5661/-

To go through rate analysis & cost-related articles, click here.

Thank you for going through this article. Have a good day 😄.

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