What is the minimum grade of concrete for precast wall components?

M25 is the minimum grade of concrete to be used (Clause 4.2).

What are the dimensional tolerances for the length of a precast panel?

The tolerance on length and width for both panels and posts is ±5 mm (Table 1).

What is the minimum required cover for the steel reinforcement?

A minimum nominal cover of 20 mm shall be provided to all reinforcement (Clause 6.2).

What key strength test is required for the precast panels (planks)?

A transverse strength test is required. The component should not fail when subjected to a load specified by the manufacturer (Clause 10.3).

What is the maximum permissible water absorption?

The maximum water absorption shall not be more than 7 percent by mass (Table 2).

IS 17565

: 2021

Precast Concrete Boundary Wall Components – Specification

CurrentFrequently UsedSpecificationBIMStructural Engineering · Precast and Prefabricated Concrete

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This standard specifies the requirements for materials, dimensions, physical properties, manufacturing, and testing of precast concrete components like planks (panels) and posts (columns) used for constructing boundary walls. It aims to standardize the quality, performance, and durability of these widely used precast elements for rapid construction.

Specifies the requirements for precast concrete components used for the construction of boundary walls.

Quick Reference Values

Minimum grade of concreteM25

Minimum cement content340 kg/m³

Maximum water-cement ratio0.45

Minimum nominal cover to reinforcement20 mm

Length/width tolerance for panels/posts± 5 mm

Thickness tolerance for panels± 2 mm

Maximum water absorption7 percent by mass

Practical Notes

Pay close attention to the foundation design for the posts, as this is critical for the overall stability of the wall and is not covered by this component specification.

Ensure proper handling and erection procedures are followed to avoid chipping, cracking, or damage to precast components during transport and installation.

Always verify the manufacturer's test certificates for compliance with the code, especially for transverse strength and water absorption, before accepting materials at the site.