DIN 21320-1987
矿山坑道用圆木.技术质量和交付要求

Round pit timber; technical quality and delivery requirements


 

 

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标准号
DIN 21320-1987
发布日期
1987年06月
实施日期
废止日期
中国标准分类号
D97
国际标准分类号
4640
发布单位
DE-DIN
被代替标准
DIN 21320-64 DIN 21320 Bb.1-64
适用范围
These quality specifications and terms of delivery apply mainly to props, canopies and half-round pieces of timber as per DIN 21316, for bars and split bars as per DIN 21317, and for struts as per DIN 21319, made from leaf or pinewood and used in mining; in their original round shape, cut over their length once or several times, squared, with or without their bark. Squared timber is round timber sawn over the whole length, the width of the cut surface being approximately equal to half the diameter of the round timber.




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