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:
“Franceska: I was happy in the life I built up for myself. I put a fine high wall of music around me and nothing could touch me. I was safe and secure. And then you had to come along and knock it all down and I hate you for that.
Maxwell: On the contrary, you love me.”
—Muriel Box (b. 1905)
“Good marriages are built on respectful disagreement and back-and-forth cooperation. We learn to cue each other, fill in for each other, forgive each other’s fumbles, celebrate small victories. We revel in the realization that we’re working on something bigger than both of us, and that parenthood is not only incredibly challenging but also incredibly enriching.”
—Susan Lapinski (20th century)
“The only human beings I have thoroughly admired and respected in the world have been those who carried the load of the world with a smile, and who, in the face of anxieties that would have knocked me clean out, never showed a tremor. Such men and women end by owning us, soul and body, and our allegiance can never be shaken. We are only too glad to be owned. Religion is nothing but this.”
—Henry Brooks Adams (1838–1918)