Black metallurgical industr年老y standard

People's Republic of black說科 metallurgy industry st鄉讀andard YB / T 4001.1-2007

National Development and Reform 拍們Commission issued

Foreword

YB / T 4001 "steel grat暗林ing and the package" is divided文又 into three parts:

- Part I: steel grat哥年ing;

- Part II: steel railings;

- Part III: ladders.

This section YB / T 4001 Part 1.

This section refer to the use of 呢唱ISO 14122-2:2001 "Safety of ma看友chinery into the machi房很nery and industrial equipm白數ent, fixed facilities, Part 2:對關 Working platforms and channe議嗎ls."

This section instead of YB / T 火師4001-1998 "steel grating.&qu愛裡ot;

YB-T4001.1-2007Lattice steel plate