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As per IS 3129-1985, the permissible tolerance for the length of finished boards shall be ___________.
┬▒2 mm
┬▒8 mm
┬▒4 mm
┬▒6 mm
┬▒8 mm
As per IS 3129:1985, which governs the specifications for particle boards, the permissible tolerance for the length and width of finished boards is fixed at ┬▒8┬аmm. This standard ensures quality control and uniformity in dimensions for industrial and construction use.
IS 3129:1985 (Specification for Particle Board for Insulation Purposes)
As per IS 3129:1985, which governs the specifications for particle boards, the permissible tolerance for the length and width of finished boards is fixed at ┬▒8┬аmm. This standard ensures quality control and uniformity in dimensions for industrial and construction use.
The dimensional tolerance in wood-based boards is defined to account for the manufacturing limitations of pressing machinery and the inherent moisture-related movement of timber particles. By setting a standardized tolerance of ┬▒8┬аmm, manufacturers ensure that boards remain within functional limits for structural applications.
IS 3129:1985 is the authoritative code for particle boards.
Tolerance is defined to minimize assembly errors in carpentry and construction.
The ┬▒8┬аmm limit applies specifically to the length and width of finished boards.
Ensures standardized product quality
Facilitates easier integration during assembly
High variance compared to metallic precision standards
Sensitive to hygroscopic expansion
Thermal and acoustic insulation in buildings
False ceilings and partition panels
IS 3129:1985 specifically deals with particle boards intended for insulation purposes.
Options A, C, and D are incorrect as they do not align with the provisions stipulated in the BIS code for particle boards.
B is correct тАФ As per IS 3129:1985, the permissible tolerance for the length of finished boards is ┬▒8┬аmm.
Always verify IS codes for timber products specifically, as tolerance values vary significantly between plywood (IS 303), fiberboard (IS 14611), and particle board (IS 3129).
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