HARDNESS OF TIMBER-WOOD JIG UNDER STATIC INDENTATION - IS 1708, PART-10

Compliance Standards

IS 1708 (Part-10)

Hardness Test

The hardness test for laminated sheets is covered under IS 1708 (Part 10) - 1986, which describes the method for determining the hardness of timber and similar materials under static indentation​.

Test Specimen

1. The specimen should be 5 × 5 cm in cross-section and 15 cm in length or 2 × 2 cm in cross-section and 10 cm in length.
2. The specimen must be defect-free and should align closely with true radial and tangential directions.

Test Procedure

1. The test is conducted on a testing machine equipped with the jig provided
2. A steel ball (1.128 cm in diameter) or a steel bar with a hemispherical end is used to penetrate the specimen to a depth of 0.564 cm.
3. Two indentations are made on the radial and tangential faces, and one on each end surface.
4. The indentation should be far enough from edges to prevent splitting.

Rate of Loading

1. The load should be applied continuously at a constant rate of 6 mm per minute for both specimen sizes​.

Recording of Data

1. The load required to achieve a 0.564 cm penetration is recorded.
2. The average hardness is determined by calculating the mean value of indentations on the radial and tangential faces.

Cost of jig only (without testing machine)