Accuracy of measuring equipment in batching plant.
Cement : + – 2%
Aggregate : + – 3%
Admixture : + – 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.
If you have a query, you can ask a question here.
We are constructing the STP now earth work completed. While dressing is being done the Client is demanded that the after complete the dressing 0.00mm level difference should be shown. also he said that negetive depth will be allowed for PCC. Now we feel very trouble to show 0.00mm level difference in Earth work what is real tolerance factor Please tell me.
Please share me tolerance IS code
ACI-117, Best Ref For the RCC – Concrete Structural Work.
area of honeycomb tolerance in column or beam