What defines a common load in terms of sling angle?

What defines a common load in terms of sling angle?

• A. Slings at any angle
• B. Slings at 10 degrees from horizontal
• C. Slings are equal to or greater than 30 Degree angles from horizontal or less than 60 degree angles from the vertical
• D. Slings at 90 degrees from horizontal

Answer: (C)

A common load is defined by sling angles that keep the lift within practical, safe loads. When each sling leg is at least 30 degrees away from the horizontal, the tension in the legs stays within typical working capacities. This is the same as having the angle from the vertical be 60 degrees or less. Keeping the angle in this range helps avoid the steep increases in sling tension that occur as the legs become more horizontal, which would require much stronger hardware or more legs. So the described range—sling angles of 30 degrees or more from the horizontal (or equivalently 60 degrees or less from the vertical)—matches how a common load is configured.

A common load is defined by sling angles that keep the lift within practical, safe loads. When each sling leg is at least 30 degrees away from the horizontal, the tension in the legs stays within typical working capacities. This is the same as having the angle from the vertical be 60 degrees or less. Keeping the angle in this range helps avoid the steep increases in sling tension that occur as the legs become more horizontal, which would require much stronger hardware or more legs. So the described range—sling angles of 30 degrees or more from the horizontal (or equivalently 60 degrees or less from the vertical)—matches how a common load is configured.