© Infrastructure Health & Safety Association (IHSA)
32 • Institute for Work & Health (IWH)
Hoisting & Rigging Basic Safety
Calculating Load Weights
The single most important precaution before attempting a lift is to determine the
weight of the load.
Methods in Determining Load Weight
• Calculate from material weight
• Refer to drawings
• Refer to shipping documents
• Refer to equipment catalogues
• Look for painted, cast or welded posting on load
• Weigh it using weigh scales or using weighing device on crane
Example 1 - Spruce Lumber
Volume = L x W x H
Weight
= L x W x H x Unit weight
= ___________
= ___________
Baseline Participant Numeracy Use Excerpt
