【国外标准】 Standard Specification for Round Wood Dowels (Pegs) for Use in Wood Construction

This specification covers the dimensions and materials for the manufacture of round wood dowels (pegs) used in the fabrication of connections in wood construction. The round wood dowels shall have diameters from 1/2 in. (12.5 mm) to 2 in. (51 mm). Diameters shall not be more than 2% oversize, nor less than 1% undersize, and shall not vary, along a wood dowel length (other than deliberate chamfer) more than 1%. Wood dowels shall be fabricated to ensure that the wood fibers are aligned with the longitudinal axis of the dowel. They shall be fabricated from any species of wood that has an oven dry specific gravity of at least 0.57; from wood that has been air-dried or kiln-dried to approximately constant weight before fabrication; and from clear, straight-grained timber free from any form of decay. Furthermore, wood dowels shall be protected with a treatment of paraffin wax, or similar sealing substance capable of inhibiting the absorption of moisture from the atmosphere.1.1 This specification covers standardizing the dimensions and materials for the manufacture of round wood dowels (pegs) used in the fabrication of connections in wood construction. The referencing of this specification in design, construction, and purchase order documents is intended to provide some assurance that the round wood dowels to be used in an assembly meet minimum materials-quality standards and that dimensions for fabrication and finish can be relied on to ensure connection performance. This specification provides regulatory agencies with a set of standards by which to judge the acceptability of round wood dowels encountered in the field and in fabricators’ shops.1.2 This specification only addresses the standardization and manufacture of round wood dowels. Other types of wood dowels, such as sawn or cleaved pegs, are outside the scope of this specification.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 Safety Hazards—There are no known hazards with the use of this specification. The products manufactured to this specification should not be brittle or difficult to install with proper tools.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.