Safe Working Load (SWL) sometimes stated as the Normal Working Load (NWL) is the load that a piece of Lifting Equipment, lifting device or accessory can safely lift, suspend, or lower without fear of breaking. Usually marked on the equipment by the manufacturer and is often 1/5 of the Minimum Breaking Strength (MBS) although other fractions may be used such as 1/4, 1/6 and 1/10
Other synonyms include Working Load Limit (WLL), which is the maximum working load designed by the manufacturer. The load represents a mass or force that is much less than that required to make the lifting equipment fail or yield, also known as the Minimum Breaking Load (MBL). The SWL is calculated using a safety factor For example, 5:1 (5 to 1, or 1/5). An example of this would be a chain that has a MBL of 2000 lbs would have a SWL or WLL of 400 lbs if a safety factor of 5 (5 to 1) is used
Famous quotes containing the words safe, working and/or load:
“Every government degenerates when trusted to the rulers of the people alone. The people themselves are its only safe depositories.”
—Thomas Jefferson (1743–1826)
“Simplicity of life, even the barest, is not a misery, but the very foundation of refinement; a sanded floor and whitewashed walls and the green trees, and flowery meads, and living waters outside; or a grimy palace amid the same with a regiment of housemaids always working to smear the dirt together so that it may be unnoticed; which, think you, is the most refined, the most fit for a gentleman of those two dwellings?”
—William Morris (1834–1896)
“To watch another carrying a load requires no exertion.”
—Chinese proverb.