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# What are the Tolerance Limits on Construction Site?

Accuracy of measuring equipment in batching plant.
Cement : + – 2%
Aggregate : + – 3%
Water : + – 3%
Mixing time : 2 minutes for one mixing. (Mixing which is being done on site)

Tolerance in Form work
In C/S for columns & Beams deviation is = + 12mm more (or) – 6mm less in size
In footing plan = + 50 mm more (or) – 12 mm less size
In depth = + – 0.05 D (specified thickness).

Tolerance in Reinforcement
For effective depth D < = 200mm = +- 10mm For effective depth D > 200mm = +- 15mm
For Cover to reinforcement = + 10mm
Maximum freefall of concrete = 1.50 m height.

Tolerance on diameter in length
0-25mm = +- 0.5 %
25-35mm = +- 0.6 %
35-50mm = +- 0.8 %

Tolerance on weight per metre
0-10mm = +- 7%
10-16mm = +- 5%
16 and above = +- 3%

Tolerance for cutting Length
A) When the specified length is not given = + 75mm (or) – 25 mm
B) When the minimum length is specified = + 50 mm (or) – 0 mm

We are thankful to Er. Vikrant for submitting this to us.

### Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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## 24 comments on "What are the Tolerance Limits on Construction Site?"

sriram says:

I would like to know whether these limits are applicable to Indian Construction works or others.

MSP says:

As per IS 4925-2003 tolerance limits for measurements in batching plants are:
Cementitious material & water + – 1%; agr + – 2%; Admixtures + – 3%.

Satyen kUmar De says:

I am thankful to this web site, because it is very helpful to the Civil Engineers. I expect more tolerance to be included in this page.

Fardin Abbassi says:

I d like to know what to do with unacceptable tolerance in concrete buildings

Mukesh kumar says:

Thanks to grow knowledge about construction.

M.Manikandan says:

VERY KIND OF YOU…………….I LOVE CIVIL

What is the standard of core test for rigid pavement? on what distance take core for testing for compressive strength?

R.Murali says:

when we buy tmt rods how much weight tolerance per ton

Arnab pal says:

Purvangkumar M Patel says:

Can anyone please tell us, which IS Code we need to refer for Construction Tolerance ? Example: ACI 117 is good for tolerance, but that is based on America. Can anyone tell me IS Code for Tolerances?

satish says:

anyone suggest r guide for referral IS codes for plastering, painting, blockwork, and room dimensions

Santhosh Marcher says:

Thank you very much sir really tolerance very use in constructions..

m.kumar says:

I need BBS format in excel and how to prepare

Sumit jain says:

Plz send rigid pavment tolerance in depth with is code

parag ingole says:

In SP 34-1987, Handbook on Reinforcement and Detailing, section 4,
Note : 4.1 – the cover shall in no case be reduced by more than 1/3rd of the specified cover or 5mm whichever is less.

what is the tolerance of steel please tell me says:

please tell me the tolerance of steel

yuvraj nikam says:

sir plz answer me. … shuttrung slab in plywood material minimum size cutting ply used with i s code

Sachin says:

Sir,
While passing purchase invoice of Reinforcement & structural steel, how much tolerance is allowed between supplier’s weight & My weight.
some times supplier does not provide loading point weight slip with invoice