The joining of metal parts by fusion, in which the necessary heat is produced by means of an electric arc.
Vertical barriers at floor level attached along exposed edges of a platform, runway or ramp to prevent materials and people from falling.
An unplanned event that does not result in personal injury, but may result in property damage, or is worthy of recording.
Mid-level horizontal board required on all open sides of scaffolds and platforms more than 14 inches from the face of the structure and more than 10 feet form the ground.
Braces placed diagonally from the bottom of one rail to the top of another rail that add support to a structure.
A person who, by degree, certificate, or professional standing, has demonstrated the ability to solve or prevent problems relating to a certain subject, work, or project.
Work done near a hazard but not actually in contact with it.
The total weight of all people, equipment, tools, materials, and loads that a ladder can hold at one time.
Top-level, horizontal boards required on all open sides of scaffolds and platforms that are more than 14 inches form the face of a structure and 10 feet above the ground.
The OSHA standard that requires contractors to educate employees about hazardous chemicals on the job site.
Elevated platforms for workers and materials.
A document that must accompany any hazardous substance, identifying the substance and it's characteristics, and exposure limits.
Enclosed, fenced, covered, or otherwise protected by barriers to prevent dangerous contact.
The conducting connection between electrical equipment or an electrical circuit and the earth.
A room or area that is used for scientific research or specialized processes. The cleanliness level is measured by the number of particles measured per cubic meter of area.