Final answer:
The correct answer is 'Construction equipment' because it is a specific standard relevant primarily to the construction industry and not a horizontal standard.
Step-by-step explanation:
The Occupational Safety and Health Administration (OSHA) establishes standards to ensure the safety and health of workers in various industries. These standards are mostly horizontal, meaning they apply across the board in the General Industry. However, some standards are specific to particular industries, such as construction or maritime. In the context of the question, the options provided include standards relating to construction equipment, first aid, fire protection, and working surfaces. The correct answer is that construction equipment would not be a horizontal standard; it is a specific standard relevant primarily to the construction industry.