The 1992 edition of IS 2690 Part 2 outlines the technical criteria for hand-crafted burnt clay flat tiles designed for flat roof terracing. It details specifications including tile dimensions, physical characteristics such as water absorption and bending strength, sampling and testing procedures, as well as marking protocols to guarantee product reliability and performance. This code is primarily utilized by manufacturers, quality assurance personnel, and engineers engaged in tile production, inspection, and application within the Indian construction sector.
Overview
The 1992 edition of IS 2690 Part 2 outlines the technical criteria for hand-crafted burnt clay flat tiles designed for flat roof terracing. It details specifications including tile dimensions, physical characteristics such as water absorption and bending strength, sampling and testing procedures, as well as marking protocols to guarantee product reliability and performance. This code is primarily utilized by manufacturers, quality assurance personnel, and engineers engaged in tile production, inspection, and application within the Indian construction sector.
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Frequently Asked
According to IS 2690 Part 2, the water absorption by weight for hand-made burnt clay flat terracing tiles must not exceed 20%. This limit ensures that the tiles maintain durability and resist weathering effects. Testing for water absorption is conducted following IS 3495 (Part 2): 1992 procedures.
The flexural strength test involves placing the tile on supports spaced at three-quarters of its length and applying a load perpendicular to this span at a controlled rate of 450 to 550 N per minute until the tile fails. The flexural strength is calculated using the formula: (15 × W × S) / (b × t²) in N/mm², where W is the breaking load in kilograms, S is the span in millimeters, b is the tile width, and t is the thickness. The minimum required flexural strength specified is 1.5 N/mm².
Hand-made burnt clay terracing tiles must have uniform shapes and sizes with tolerances typically around ±3% of the nominal dimensions, although minor variations ranging from ±3 mm to ±5 mm can be acceptable given the manual manufacturing process. The maximum allowable warpage is limited to 2% of the tile dimension, ensuring tiles lie flat without twists, bends, or cracks.
The sampling protocol for assessing the quality of hand-made terracing tiles follows the guidelines of IS 5454:1978, which covers sampling procedures for clay building bricks. Samples are randomly selected from production lots in quantities proportional to batch size to ensure representativeness. This method supports accurate quality assessment through physical and mechanical testing.
Each hand-made terracing tile must bear a clear and permanent marking that includes the manufacturer's identification or trademark and the symbol 'Il' to indicate it is handmade. The marking should cover no more than 5% of the tile's surface area. Optionally, tiles may display the BIS Standard Mark to signify adherence to the Indian Standards and quality control regulations.
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