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:
“True it is that she who escapeth safe and unpolluted from out the school of freedom, giveth more confidence of herself than she who cometh sound out of the school of severity and restraint.”
—Michel de Montaigne (1533–1592)
“I shall never send for a priest or recite an Act of Contrition in my last moments. I do not mind if I lose my soul for all eternity. If the kind of God exists Who would damn me for not working out a deal with Him, then that is unfortunate. I should not care to spend eternity in the company of such a person.”
—Mary McCarthy (1912–1989)
“‘Tis all men’s office to speak patience
To those that wring under the load of sorrow,
But no man’s virtue nor sufficiency
To be so moral when he shall endure
The like himself.”
—William Shakespeare (1564–1616)