ISO 14120:2015规定了设计，建造和选择保护人员免受机械危害的一般要求。 ISO 14120:2015表示可能影响卫兵设计和施工的其他危害。 ISO 14120:2015适用于将在发布后制造的机械的卫兵。 如果使用固定和可移动的防护装置，则适用这些要求。本国际标准不包括互锁装置。这些包含在ISO 14119中。 ISO 14120:2015不适用于与移动性有关的特殊系统的要求，如ROPS（翻车保护结构），FOPS（落物保护结构）和TOPS（保护结构顶端）或机械提升载荷的能力

ISO 14120:2015 specifies general requirements for the design, construction, and selection of guards provided to protect persons from mechanical hazards. ISO 14120:2015 indicates other hazards that can influence the design and construction of guards. ISO 14120:2015 applies to guards for machinery which will be manufactured after it is published. The requirements are applicable if fixed and movable guards are used. This International Standard does not cover interlocking devices. These are covered in ISO 14119. ISO 14120:2015 does not provide requirements for special systems relating specifically to mobility such as ROPS (rollover protective structures), FOPS (falling-object protective structures), and TOPS (tip over protective structures) or to the ability of machinery to lift loads.