DIN EN 14081-4-2006 木结构.矩形截面强度分级结构木材.第4部分:机器分级.机器控制系统的分级机器设置.德文版本 EN 14081-4-2005
Timber structures - Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems; English version of DIN EN 14081-4:2006-02
The document applies to train-induced aerodynamic loading on open track caused by trains passing a permanent or temporary strucutre, a person who is alongside the track or two trains passing each other. The document applies to open air structures of any length and closed structures of a length less than 20 m enveloping the tracks. Flor closed structures enveloping the tracks longer than 20 m prEN 14067-5 applies. For effects caused by cross winds, the aerodynamic phenomena are described in prEN 14067-6. In addition, the document applies to the resistance of motion for trains in open air.#,,#