Safety codes

Stairs are a structure designed to bridge a large vertical distance between lower and higher levels by dividing it into smaller vertical distances. This is achieved as a diagonal series of horizontal platforms called steps which enable passage to the other level by stepping from one to another step in turn. Steps are very typically rectangular, but may instead be straight, curved, or may consist of two or more straight pieces connected at angles.

hazard symbol used by emergency personnel to identify the risks posed by hazardous materials

Wikimedia list article

Wikimedia list article

United Nations treaty that governs transnational road transport of hazardous materials

standard related to occupational health and safety management systems, as published by Occupational Health and Safety Assessment Series Project Group

United States federal government agency

standard related to occupational health and safety management systems, as published by International Organization for Standardization

certification mark

alt=lockout tagout|thumb|Lockout Tagout hasp can accommodate up to 6 padlocks, can be used during group LOTO procedure. Lock out, tag out or lockout–tagout (LOTO) is a safety procedure used to ensure that dangerous equipment is properly shut off and not able to be started up again prior to the completion of maintenance or repair work. It requires that hazardous energy sources be "isolated and rendered inoperative" before work is started on the equipment in question. The isolated power sources are then locked and a tag is placed on the lock identifying the worker and reason the LOTO is placed o

sets of standards, aimed at safety at workplaces and reducing occupational risk from exposure to occupational hazards

European Union directive

horizontal or weakly inclined part of a stairway

electrical wiring standard

European Union Directive (EU) 2012/18

standards designed to ensure the safety of products, activities and processes, etc.

United States law