Important part of construction work is covering

 

           Here's a table showing the clear cover requirements for various structural elements in both                         millimeters (mm) and inches:

Structural Element

Clear Cover (mm)

Clear Cover (inches)

Slabs

20 mm to 25 mm

0.8 to 1 inch

Beams

25 mm to 40 mm

1 to 1.6 inches

Columns

40 mm to 50 mm

1.6 to 2 inches

Foundations (Footings)

50 mm to 75 mm

2 to 3 inches

Retaining Walls

40 mm to 50 mm

1.6 to 2 inches

Staircases

15 mm to 25 mm

0.6 to 1 inch

Footpaths/Pavements

20 mm to 30 mm

0.8 to 1.2 inches

Water Retaining Structures

40 mm to 75 mm

1.6 to 3 inches

 

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