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Cover Blocks, Minimum Clear Cover, Effective cover

Er. Parbhakar Dwivedi
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Clear Cover: It is the least distance between the surface of embedded reinforcement and the outer surface of the concrete.

Effective cover: The distance between the outer surface of the concrete and the center of the reinforcement / rebar.

Purpose of Concrete Cover:

To protect the reinforcement Bars from environmental effects to prevent their corrosion.

To give sufficient embedding to enable them to be stressed without slipping

To provide thermal insulation from fire

Minimum Clear Concrete Cover to Reinforcement

Items Cover in mm
FOUNDATIONS (SIDE/TOP) 50 MM
FOUNDATION / RAFT (BOTTOM) 50 / 75 MM
COLUMNS 40 / 50 MM
FLOOR SLABS 25 MM
FLOOR BEAMS 25 / 30 MM
LINTELS 25 MM
RCC Wall / RETAINING WALL (EXPOSED TO EARTH) 50 MM
SHEAR WALL / RCC Wall 30 / 40 MM
WATER RETAINING STRUCTURE 50 MM

Different types of cover block available in market- Precast concrete cover block, Plastic / PVC cover, HDPE Cover etc.

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QS & Cost management, Bill Checking / Audit, Technical Auditors, Valuation, Contract and Tendering, Project Management, Project Planning, Quality Control, Consulting Engineers, Structural Consultancy

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