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:
“As a general truth, it is safe to say that any picture that produces a moral impression is a bad picture.”
—Edmond De Goncourt (1822–1896)
“Both at-home and working mothers can overmeet their mothering responsibilities. In order to justify their jobs, working mothers can overnurture, overconnect with, and overschedule their children into activities and classes. Similarly, some at-home mothers,... can make at- home mothering into a bigger deal than it is, over stimulating, overeducating, and overwhelming their children with purposeful attention.”
—Jean Marzollo (20th century)
“Men so noble,
However faulty, yet should find respect
For what they have been. ‘Tis a cruelty
To load a falling man.”
—William Shakespeare (1564–1616)