船舶和航海技术 单梯级和狗步梯梯级

[中文适用范围]： 本文件规定了船舶或其他海上结构物的垂直面板或桅杆上安装的单梯和狗梯用梯子的型式、结构、尺寸、技术要求、检验和标记。 [外文原描述]： This document specifies the types, structure, dimensions, technical requirements, inspection and designation of single rungs and rungs for dog-step ladders, fitted to the vertical panel or masts of ships or other marine structures.