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IS 5751:1984 is the Indian Standard (BIS) for precast concrete coping blocks. This standard specifies the requirements for materials, dimensions, physical properties, and testing of precast concrete coping blocks. It covers various types of blocks (splayed, saddleback, half-round) used to cap and protect the top of masonry walls and parapets.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure blocks have a properly formed 'drip' or 'throat' groove underneath to prevent water from running down and staining the wall face.
! Verify the finish of the blocks on delivery; they should be free from cracks and large blemishes that could affect durability and appearance.
! Proper bedding mortar (typically 1:3 or 1:4 cement-sand) is crucial for creating watertight and strong joints between coping blocks.
Frequently referenced clauses
Cl. 3Materials
Cl. 4Dimensions and Tolerances
Cl. 5Physical Requirements
Cl. 7Sampling and Criteria for Conformity
Cl. 8Marking
Updates & Amendments2 amendments
Amendment 1 (Aug 1993)
Amendment 2 (Jun 1995)
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
concreteprecast concretecement
International Equivalents
Similar International Standards
ASTM C1882 / C1882M - 21ASTM International, USA
HighCurrent
Standard Specification for Precast Concrete Coping and Caps
Directly specifies requirements for precast concrete units used as coping or caps on walls.
BS EN 12839:2012BSI (British Standards Institution), UK / CEN, Europe
HighCurrent
Precast concrete products - Fencing elements
Covers requirements for precast concrete fencing components, including capping units for walls.
BS 5642-2:1983BSI (British Standards Institution), UK
HighWithdrawn
Sills and copings. Part 2: Specification for copings of precast concrete, cast stone, natural stone and clayware
A direct historical equivalent specifying requirements for precast concrete wall copings.
CSA A23.4-16CSA Group, Canada
MediumCurrent
Precast concrete — Materials and construction
Provides general requirements for all precast concrete elements, including architectural items like copings.
Key Differences
≠IS 5751 primarily specifies strength via a transverse breaking load test, whereas modern standards like ASTM C1882 focus on minimum compressive strength as the primary strength indicator.
≠IS 5751 defines four specific dimensional profiles (Type A, B, C, D). International standards are generally more flexible, specifying performance requirements that apply to any manufacturer-defined shape and size.
≠International standards for regions with cold climates (e.g., ASTM C1882, BS EN 12839) include optional or mandatory provisions for freeze-thaw durability testing, which are absent in IS 5751:1984.
≠The water absorption limit in IS 5751 (10%) is less stringent than the typical requirements in modern international standards (e.g., 6% in BS EN 12839).
Key Similarities
≈All standards specify the use of Portland cement, aggregates, and water as the primary constituents for manufacturing the concrete blocks.
≈All standards recognize the importance of durability by setting a maximum limit on water absorption, as high absorption can lead to faster deterioration.
≈All relevant standards provide specified limits on dimensional variations (tolerances) for length, width, and height to ensure a uniform and proper fit during installation.
≈The fundamental purpose of the products covered by all these standards is the same: to provide a protective and often decorative capping for the top of a wall to prevent water ingress.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Strength Requirement
Transverse Breaking Load (min avg 3.0 kN for Type A, B, C)
Compressive Strength (min 28 MPa / 4000 psi)
ASTM C1882 / C1882M - 21
Water Absorption (Average, max)
10% by mass (24-hour cold soak)
6% by mass
BS EN 12839:2012
Freeze-Thaw Resistance
Not specified
Required if specified by purchaser, with mass loss limits
ASTM C1882 / C1882M - 21
Length / Width Tolerance
± 3 mm
± 3 mm (for dimensions up to 610 mm)
ASTM C1882 / C1882M - 21
Height Tolerance
± 2 mm
± 3 mm
ASTM C1882 / C1882M - 21
Minimum Cement Content
Not specified in this standard (refers to IS 456)
300 kg/m³ (for exposure class XC3/XC4)
BS EN 12839:2012
⚠ Verify details from original standards before use