夜间驾驶员非常清楚太阳落山后有效照明对道路的重要性。ANSI C136.53-2017封闭式吊灯安装的新型道路照明标准，是一项针对封闭式吊灯的可变换道路照明的尺寸、维护和光分布特性进行指导的新标准。如果灯具具有相似的尺寸、形状和重量，只要它们适合安装吊坠，灯杆的强度要求不会改变，灯光的分布也相似，并且能够使用类似的维护程序，那么该系统就允许更换灯具。美国国家标准(ANS)是由ANSI认可的照明系统标准委员会C 137制定，由国家电气制造商协会(NEMA)发起。
隧道是美国和国外运输系统的一个组成部分，每天都有数百万人要依靠隧道进行日常通勤、航运和长途旅行。ASTM E3134-17运输隧道结构部件和被动防火系统的标准规范适用于混凝土隧道衬砌、耐火材料和结构隧道构件的耐火性。试验包括评估移动接头及其对整体耐火性能的影响，但不涉及设备的机械连接方法。美国国家标准是由ASTM 制定的。
In an effort to communicate the vital role that standards play in daily life, the American National Standards Institute(ANSI) publishes snapshots of the diverse standards initiatives undertaken in the global and national standards arena, many of which are performed by ANSI members and ANSI-accredited standards developers. Two of the latest selections follow:
Pendant-Mounted Luminaries for Roadway Lighting
Nighttime drivers are well aware of the importance of effective lighting for roadways after the sun goes down. ANSI C136.53-2017, New Roadway Lighting Standard for Enclosed Pendant-Mounted Luminaires, is a new standard that guides dimensional, maintenance, and light distribution features for roadway lighting that are interchangeable in enclosed pendant-mounted luminaries. The system allows for luminaries to be interchanged if they are a similar size, shape, and weight, as long as they fit the mounting pendant, pole strength requirements will not change, light distribution will be similar, and similar maintenance procedures will be used. This American National Standard (ANS) was developed by the ANSI Accredited Standards Committee C137, Lighting Systems, which is sponsored by the National Electrical Manufacturers Association (NEMA).
NEMA, an ANSI member and accredited standards developer, is a membership organization representing nearly 350 electrical equipment and medical imaging manufacturers. The organization provides a forum for the development of technical standards, advocacy of industry policies, and collection, analysis, and dissemination of industry data.
Fire Resistance for Transportation Tunnels
Tunnels are an integral part of the transportation system in the U.S. and abroad, with millions relying on them for their daily commute, shipping routes, and long-distance travel. Fire protection systems are a critical part of the safe operation of these structures, and a new standard provides guidance on testing tunnels for their fire resistance. ASTM E3134-17, Standard Specification for Transportation Tunnel Structural Components and Passive Fire Protection Systems, applies to the fire resistance of concrete tunnel linings, fire-resistive materials, and structural tunnel members. The tests include assessment of movement joints and their impact on overall fire resistance, but do not address mechanical attachment methods for equipment. This American National Standard was developed by ASTM International.
ASTM, an ANSI member and audited designator, has developed over 12,000 standards that are in use around the world, with a focus on improving product quality, enhancing health and safety, strengthening market access and trade, and building consumer confidence.
地址：北京海淀区马甸东路9号 邮编：100088 邮箱：firstname.lastname@example.org