An HEO needs to lift a 4,000 kg steel beam using two synthetic web slings in a basket hitch, where each sling forms a 60-degree angle with the horizontal. What is the minimum Working Load Limit (WLL) required for each individual sling when used in a straight pull configuration, to safely lift this beam? (Reference angle factor calculations for basket hitches).

Question: An HEO needs to lift a 4,000 kg steel beam using two synthetic web slings in a basket hitch, where each sling forms a 60-degree angle with the horizontal. What is the minimum Working Load Limit (WLL) required for each individual sling when used in a straight pull configuration, to safely lift this beam? (Reference angle factor calculations for basket hitches).

Answer options:

• 2,000 kg ✅ 2,310 kg
• 1,155 kg
• 4,000 kg

Correct answer: 2,310 kg

Explanation: For a two-leg basket hitch, the load on each leg is Load / (2 * sin(angle from horizontal)). Here, 4000 kg / (2 * sin(60°)) = 4000 kg / (2 * 0.866) = 4000 kg / 1.732 = 2309.4 kg. Therefore, each sling should have a WLL of at least 2310 kg to account for the angle, as per CSA B335 rigging guidelines.