IS 3370:2009 Part 1 is the Indian Standard (BIS) for concrete structures for storage of liquids - code of practice - general requirements. This code specifies the general requirements for the design, construction, and materials of plain, reinforced, and prestressed concrete structures meant for the storage of liquids. It emphasizes durability, impermeability, crack control, and proper joint detailing to prevent leakages.
Specifies general requirements for design and construction of concrete structures for the storage of liquids.
Overview
- Status
- Current
- Usage level
- Essential
- Domain
- Structural Engineering — Swimming Pools and Sports Facilities
- Type
- Code of Practice
Also on InfraLens for IS 3370
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Proper execution of construction and expansion joints is as critical as structural design to achieve watertightness.
! Continuous and adequate moist curing is vital to prevent early shrinkage cracks which can compromise impermeability.
! Concrete for liquid retaining structures is deemed to be subject to 'Severe' exposure conditions by default.
Frequently referenced clauses
reinforced concreteplain concreteprestressed concretecement
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values6
Quick Reference Values
Minimum grade of concrete for RCC liquid retaining structuresM30
Minimum grade of concrete for PCC liquid retaining structuresM20
Minimum grade of concrete for Prestressed liquid retaining structuresM40
Maximum water-cement ratio0.45
Minimum cement content for RCC320 kg/m³
Maximum design crack width for liquid retaining face0.2 mm
Tables & Referenced Sections
Key Tables
Table 1 - Minimum Cement Content, Maximum Water-Cement Ratio and Minimum Grade of Concrete
Table 2 - Requirements for Joints
Key Clauses
Clause 4 - Materials
Clause 5 - Exposure Conditions
Clause 6 - Requirements for Concrete
Clause 8 - Impermeability of Concrete
Clause 10 - Joints
Frequently Asked Questions4
What is the minimum grade of concrete required for an RCC water tank?+
M30, as per Table 1 of IS 3370 Part 1.
What is the maximum allowed water-cement ratio for concrete retaining liquids?+
0.45 to ensure impermeability and durability.
What is the minimum cement content for reinforced concrete liquid storage structures?+
320 kg/m³, as per Table 1.
What is the permissible crack width for structures storing liquids?+
The maximum calculated surface crack width should not exceed 0.2 mm.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.