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Essential Skills and OHS Training

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© Infrastructure Health & Safety Association (IHSA) 45 • Institute for Work & Health (IWH) Calculating Load Weights Using Length (Use Table 1.1 in M035) Example 1: Calculate the weight in kilograms of a bundle of rebar. The bundle contains fifteen bars with a diameter of 1¼ ". The bars are 12' 4" long. Step 1: Convert 12' 4" to decimal feet. Note: To convert inches to feet, divide inches by 12. 4" ÷ 12 = 0.333' 12' 4" = 12.333' Step 2: Locate the unit weight in Table 1.1 Approximate Weight per Foot of Length of round Steel Bars and Rods. 1 ¼" = 4.17 lbs per foot of length Step 3: Calculate the weight. Weight = # of bars × length × unit weight (lbs/foot) = 15 × 12.333' × 4.17 lbs/ft = 771.42915 lbs Step 4: Convert the weight to kilograms. 1 kg = 2.2 lbs Note: To convert pounds to kilograms, divide by 2.2 To convert kilograms to pounds, multiply by 2.2 771.42915 lbs ÷ 2.2 lbs/kg = 351 kg

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