Figure 2-6.-Portable scales.Step 5.(FAW). TheDetermine the forward axle weightFAW is the total weight reading of thescales under each front tire. Example: The left fronttire scale reads 3,000 pounds, and the right front tirescale reads 3,000 pounds, and the FAW equals 6,000pounds. This “FAW” is written (FAW 6,000) on apiece of weather-resistant material, such as duct tape,with a grease pencil,fender above the axle.and attached to the vehicleRemember, this tape must beremoved upon arrival at the site to avoid the removalof the paint on the vehicle.Step 6. Determine the intermediate axle weight(IAW). The IAW is the total weight reading of thescales under the intermediate tires.Follow theprocedures for Step 5 and label the reading as “IAW”on the masking tape.Remember, the IAW is theweight readings of both scales added together andrecorded in pounds.Step 7. Determine the rear axle weight (RAW).The RAW is the total weight reading of the scalesunder the rear tires. Follow the procedures for Step 5and label the reading as “RAW’ on the masking tape.Remember, the RAW is the weight readings of bothscales added together and recorded in pounds.NOTE: The RAW for vchiclcs with tandem axlesis the weight of the IAW and the RAW added togetherand labeled above the trunnion (fig. 2-7).Step 8. Compute moment 1 (Ml). The formulafor M 1 is distance 1 times the forward axle weight orD1 x FAW = M1.Step 9. Compute moment 2 (M2). The formulafor M2 is distance 2 times the intermediate axleweight or D2 x IAW = M2Figure 2-7.—Marking procedures.2-7
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