What is the minimum grade of concrete specified for these channel units?

Grade M15 is the minimum requirement (Clause 4.1).

What is the minimum clear cover to reinforcement?

15 mm or the diameter of the reinforcing bar, whichever is greater (Clause 6.3).

What is the main acceptance criterion for the transverse load test?

The unit should not show any cracks, and after the removal of the test load, the recovery of deflection should be at least 75% (Clause 10.3.1).

What are the standard widths for these channel units?

The standard widths are 300 mm and 600 mm (Table 1).

IS 14201

: 1994

precast reinforced concrete channel units for the construction of floors and roofs

CurrentSpecializedSpecificationBIMStructural Engineering · Planning, Housing and Pre-fabricated Construction

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This standard specifies the requirements for materials, dimensions, manufacturing, and testing of precast reinforced concrete channel units. These units are intended for use in the construction of floors and roofs, often with a structural concrete topping. It covers material properties, dimensional tolerances, workmanship, and performance criteria under load tests.

precast reinforced concrete channel units for the construction of floors and roofs

Quick Reference Values

Minimum grade of concreteM15

Minimum nominal cover to reinforcement15 mm

Maximum water absorption by mass10%

Standard width of units300 mm and 600 mm

Permissible tolerance in length± 10 mm

Permissible tolerance in width/depth± 5 mm

Minimum deflection recovery after transverse test75%

Practical Notes

Ensure proper handling and stacking on-site to prevent chipping of edges or cracking, which can compromise structural integrity.

The performance of the final floor/roof system heavily relies on the quality and bond of the in-situ structural topping concrete, which must be placed as per design.

Always verify the manufacturer's test certificates for each supplied batch to ensure compliance with the specified load-bearing capacity and material requirements.