This standard outlines the specifications for wooden pins designed for erecting bivouac tents, widely used by defense personnel, trekkers, and camping groups. It covers approved timber varieties, size and dimensional criteria, craftsmanship guidelines, sampling protocols, and quality assurance measures to guarantee the pins' robustness and reliability in outdoor environments.
Overview
This standard outlines the specifications for wooden pins designed for erecting bivouac tents, widely used by defense personnel, trekkers, and camping groups. It covers approved timber varieties, size and dimensional criteria, craftsmanship guidelines, sampling protocols, and quality assurance measures to guarantee the pins' robustness and reliability in outdoor environments.
Audience
Contents
Structure
This section defines the extent of the standard, detailing the specifications for materials, workmanship, and sampling of wooden pins used in bivouac tents. It references IS 707-1976 for timber characteristics and IS 4905-1968 for sampling methods. It also includes a sampling table specifying sample sizes and acceptable defect limits to maintain quality control.
All terminologies conform to IS 707-1976 standards. Test results must be rounded following IS 2-1960 guidelines, with sampling acceptance criteria detailed in Clause 3.3. The section also lists units of measurements used, adhering to the SI system, and provides updated botanical names of timber species.
This part covers the quality requirements for wooden pins, including permissible timber types as per Appendix A, moisture limits, grain inclination, and defect restrictions. Sampling and testing protocols to verify material conformity are also explained, along with dimensional tolerances.
Details on dimensional tolerances (refer Fig. 1), workmanship standards for smooth finishes, and surface quality are described here. The section highlights the importance of uniformity and durability, referencing IS 707:1976 for material definitions and IS 2:1960 for rounding test data.
Specifies the exact measurements for wooden pins, including length, diameter, and a 3 mm central hole for handling. Tolerances for each dimension are outlined with reference to Fig. 1. The section emphasizes the necessity for smooth, crack-free surfaces.
Standards for neat manufacturing and a reasonably smooth finish to prevent splinters are discussed. Inspection criteria include shape, workmanship quality, and visual defects, with sampling procedures ensuring compliance.
Describes random sampling per IS 4905:1968, sample sizes based on lot quantity, and permissible numbers of defective pins. This section explains how to determine lot acceptance or rejection through statistical quality control.
Wooden pins must be permanently and clearly marked with the manufacturer’s name or trademark and the manufacturing year. The use of the BIS Standard Mark is optional but regulated under BIS licensing rules. The section also lists approved timber species with their trade and botanical names.
Details the approved timber varieties for manufacturing wooden pins, including their trade names, abbreviations, and botanical nomenclature. Quality requirements such as maximum moisture content and defect prohibitions are specified, along with testing protocols.
Provides detailed guidance on sample selection per lot size, permissible defective limits, and procedures for further testing of sub-samples. The appendix ensures that sampling methods maintain representativeness and uphold quality assurance per the standard.
Frequently Asked
According to Clause 3.1 and Appendix A of the standard, wooden pins must be made from specified timber species. These typically include durable and strong woods such as Hardwickia binata (Anjan), Shorea robusta (Sal), Dalbergia sissoo (Sissoo), and others listed with their botanical names. The timber should be well-seasoned and free from defects to ensure strength and longevity.
As per the standard’s Fig. 1, wooden pins generally have lengths around 300 mm and diameters between 20 to 25 mm, with permissible tolerances of ±2 mm for length and ±1 mm for diameter. Each pin features a centrally drilled 3 mm hole with a ±0.1 mm tolerance. The pins must have smooth surfaces, free from cracks, and be made from properly seasoned hardwood.
The standard mandates that timber used for pins must be seasoned so that the moisture content does not exceed 20%. This ensures durability and reduces the risk of dimensional changes or decay. Timber must also be free from sapwood, rot, insect damage, knots, cracks, or other defects that can compromise the material’s integrity.
Sampling is conducted using random methods as per IS 4905:1968, with sample sizes determined by lot quantity outlined in Table 1. Each sample allows a certain maximum number of defective pins. A lot is accepted if the number of defective pins is within this permissible limit; otherwise, it is rejected. Further testing on sub-samples is also performed to confirm quality.
Each wooden pin must be clearly and permanently marked with the manufacturer’s name or an established trademark and the year of manufacture. This marking ensures traceability and adherence to quality standards. Additionally, pins may carry the BIS Standard Mark, subject to licensing and inspection as per BIS regulations.
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