The 2006 edition of IS 1658 delineates the specifications for fibre hardboards intended for use in construction, furniture, and paneling under both dry and moist environments. It classifies hardboards into medium, standard, and tempered categories, detailing their sizes, physical and mechanical characteristics, and prescribed testing methods. This standard is crucial for producers, quality assurance personnel, and engineers aiming to comply with Indian quality benchmarks and environmental standards, including ECO-Mark certification for environmentally sustainable products.
Overview
The 2006 edition of IS 1658 delineates the specifications for fibre hardboards intended for use in construction, furniture, and paneling under both dry and moist environments. It classifies hardboards into medium, standard, and tempered categories, detailing their sizes, physical and mechanical characteristics, and prescribed testing methods. This standard is crucial for producers, quality assurance personnel, and engineers aiming to comply with Indian quality benchmarks and environmental standards, including ECO-Mark certification for environmentally sustainable products.
Audience
Contents
Structure
Frequently Asked
IS 1658 specifies dimensions and allowable tolerances for fibre hardboards as follows: For length, medium and standard hardboards come in 1.2 to 3.66 meters with ±3 mm/m tolerance; tempered hardboards range from 4.26 to 5.00 meters with ±5 mm/m tolerance. Width for medium hardboard is 1 m, standard is 1.22 m with ±3 mm/m tolerance, while tempered widths are not clearly defined. Thickness varies by type and size, with tolerances from ±0.4 mm to ±0.9 mm depending on thickness and board category. Squareness and edge straightness tolerances apply primarily to standard hardboards at 3 mm/m and 2 mm/m respectively.
The standard mandates specific physical and mechanical attributes for fibre hardboards: Medium hardboards have densities between 350 and 800 kg/m³, while standard and tempered types range from 800 to 1025 kg/m³. Moisture content must be maintained between 5% and 15%. Water absorption and swelling limits ensure dimensional stability, with tempered boards exhibiting the lowest absorption. Mechanical strength parameters such as modulus of rupture, modulus of elasticity, and tensile strength have defined minimums to ensure performance under load and stress.
Swelling in thickness is measured by immersing three smooth-edged specimens of 50 ± 1 mm size in neutral pH water at approximately 27°C for 24 hours, ensuring submersion under 25 ± 5 mm of water. After immersion, specimens are wiped and rested for an hour before thickness is re-measured at designated points. The percentage swelling is calculated from the thickness difference before and after immersion, averaged over specimens, and rounded to one decimal place. The mean swelling must not exceed limits specified in the standard’s Table 2 to ensure dimensional stability.
IS 1658 requires random sampling from production lots, selecting boards at regular intervals determined by dividing lot size by sample size. Samples undergo testing for all physical and mechanical requirements. A lot is accepted only if all sampled boards comply with specified standards, including dimensional, strength, and surface quality criteria. This systematic sampling approach ensures representative quality assessment and aligns with accepted acceptance sampling plans such as ISO 2859-1.
Manufacturers must secure Environmental Consent Clearance from the State Pollution Control Board under the Water (Prevention and Control of Pollution) Act, 1974, Air (Prevention and Control of Pollution) Act, 1981, and Water Cess Act, 1977, along with any required authorization under the Environment (Protection) Act, 1986. Compliance with forest department regulations is mandatory. Documentary evidence such as certificates or declarations must be submitted to BIS during ECO-Mark application. Products must also be appropriately marked with manufacturer details, board type, dimensions, date of manufacture, and ECO-Mark labels to ensure traceability and environmental compliance.
Ask AI about any clause, requirement, or provision in IS 1658. Get instant, clause-cited responses powered by our indexed library.
Free tier includes 150 queries (50 AI + 100 Reference) · No credit card required