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Minimum Concrete Cover for Reinforcement in Footing, Beam, Column, Beam - Civil Experience

Why Concrete Cover need?

  • Concrete Cover ( Cover or Clear cover or Nominal cover) for reinforcement is must be required to Protect the Reinforcement rebar bar against corrosion and also to protect against fire

Concrete Cover Requirements

Minimum Concrete Cover for Reinforcement | as per is 456 the minimum nominal cover specified for footing is

Basically, as you all know, Concrete cover blocks are provided as a safeguard of reinforcement from various impacts like moisture, heat, chemicals...

In sort, Keep the strength of reinforcement of structure and make the structure Durability as long as possible

  • To provide safety to reinforcement bars to avoid corrosion from the factors of the environment
  • To provide safety to reinforcement bars from Fire  (Thermal insulation)
  • To provide proper and sufficient support to reinforcement to keep their position

Also Read

Minimum Concrete Cover for Reinforcement in Footing, Beam, Column, Beam

Classification of Condition for providing Clear cover

  1. Based on Serviceability
  2. Based on Structure

Environmental Conditions in India are categorized as below

Based on environmental conditions like which type of soil, where the site of construction, the water reservoir is near to the site of construction, etc

As per IS 456 the minimum nominal cover specified for the slab is

  • Mild - 25 mm minimum cover
  • Moderate - 30 mm minimum cover
  • Serve - 45 mm minimum cover (Building in control coastal area, footing touch with soil)
  • Very Serve - 50 mm minimum cover (Footing in critical salty soils, Building onshore)
  • Extreme - 75 mm minimum cover

Minimum Nominal Cover Based on the Structure

  1. For footing minimum nominal cover is - 15 mm minimum cover (as per is 456 the minimum nominal cover specified for footing is)
  2. Flate Slab - 20 mm minimum cover
  3. Grade Slab - 20 mm minimum cover
  4. Beam - 25 mm minimum cover
  5. Strap Beam - 50 mm minimum cover
  6. Column - 40 mm minimum cover
  7. Shear wall - 25 mm minimum cover 
  8. Footing - 50 mm minimum cover
  9. Raft Foundation Top - 50 mm minimum cover
  10. Raft Foundation Bottom - 75 mm minimum cover
  11. Staircase - 15 mm minimum cover
  12. Ret. Wall on earth - 20-25 mm minimum cover

Also read:-

Steps for CRACK control - Civil Experience

how to calculate cement sand and aggregate quantity in concrete Automatically

FAQ for Concrete Cover

FAQ 1:  Why Concrete Cover need?

Concrete Cover ( Cover or Clear cover or Nominal cover) for reinforcement is must be required to Protect the Reinforcement rebar bar against corrosion and also to protect against fire 

FAQ 2: as per is 456 the minimum nominal cover specified for footing is? 

as per is 456 the minimum nominal cover specified for footing is 15 mm minimum cover 

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