| A | B |
|---|
| Apparatus | Assembly of machines used together to do a particular job |
| Arc | Flow of electrical current through a gas from one pole to another pole |
| Arc Welding | Joining of metal parts by fusion |
| Combustible | Capable of easily igniting and rapidly burning |
| Competent person | person who is capable of identifying existing and predictable hazards and takes prompt corrective measures to eliminate them |
| Concealed receptacle | Electrical outlet that is placed insode the structural elements of a building |
| Confined space | Work area that an employee must physically enter the space to perform work |
| Cross-bracing | Braces placed diagonally from the bottom of one rail |
| Dross | Waste material resulting from cutting using a thermal process |
| Electrical distribution panel | System that brings electricity from the street source |
| Excavation | Man-made cut, cavity, trench, or depression in an earth surface |
| EMR | Experience modification rate |
| Experience modification rate | Determines surcharge or credit to workers compensations based on company's accident experience |
| Extension ladder | Two ladders connected so overall length can be adjusted |
| Flammable | Capable of easily igniting and rapidly burning |
| Flash | A sudden bright light associated with starting up a welding torch |
| Flashback | A welding flame that flares up and chars the hose |
| Flash burn | Damage that can be done to eyes after brief exposure to ultraviolet light from arc welding |
| Flash goggles | Eye protective equipment worn by welders |
| Flash point | The temperture at which fuel gives odd nough gas to burn |
| Foot-candle | A unit of measure of the intensity of light falling on a surface |
| Ground | The conducting connection between electrical equipment and the earth |
| GFCI | Ground fault circuit interrupter |
| Ground fault circuit interrupter | device that interrupts and de-energizes to protect fro electrocution |
| Guarded | Enclosed, fenced, covered, or other-wise protected to prevent dangerous contact |
| Hand line | A line attached to a tool or object so a worker can pull it up after climbing a ladder |
| HazCom | Hazard Communication Standard |
| Hazard Communication Standard | OSHA standard the requires contracters to educate emploees about chemicals |
| Lanyard | Short section of rope that is attached to a worker's safety harness |
| Lockout/tagout | Formal procedure for taking equipment out of service |
| Management system | Organization of a company's management |
| MSDS | Material Safety Data Sheet |
| Material Safety Data Sheet | Identifies substance and gives exposure limits |
| Maximum allowable slope | The steepest incline of an excavation face that is acceptable |
| Maximum intended load | The total weight that a ladder can hold at one time |
| Mid-rail | Mid-level horizontal board on all open scaffolding |
| OSHA | Occupational Safety and Health Administration |
| Occupational Safety and Health Administration | An agency of the US Department of Labor |
| Permit-required confined space | Confined space that requires written permission to use |
| PPE | Personal protective equipment |
| Personal protective equipment | Equipment or clothing designed to prevent or reduce injuries |
| Planked | Material 2 or more inches thick and 6 or more inches wide |
| Proximity work | Work done near a hazard but not actually in contact with it |
| Qualified person | An educated person who has the ability to solve or prevent problems |
| Respirator | A device that provides clean, filtered air for breathing |
| Safety culture | The culture created when the whole company sees the value of a safe work environment |
| Scaffold | An elevated platform for workers and materials |
| Shoring | Using pieces of timber to hold a wall in place temporarily |
| Signaler | A person responsible for directing a vehicle when the driver's vision is blocked in any way |
| Six-foot rule | A rule stating tha platforms with unprotected sides, six feet or higher require fall protection |
| Slag | Waste material fro welding operations |
| Spall | Chip or fragment of rock or soil that has broken off from the main mass |
| Stepladder | A self-supporting ladder consisting of 2 elements hinged at the top |
| Straight ladder | A nonadjustable ladder |
| Switch enclosure | A box that houses electrical switches used to regulate and distribute electricity in a building |
| Toeboard | Vertical barrier to prevent materials and people from falling |
| Top rail | Top-level horizontal board required on all open sides of scaffolding |
| Trench | A narrow excavation made below the surface of the ground |
| Welding shield | A protective screen for welders |
| Wind sock | A cloth cone open at both ends mounted in a high place to show wind direction |
