All discs used in competition must weigh within how many grams of their face value?

In powerlifting competitions, it is crucial that the weights used on the bar adhere to strict specifications to ensure fairness and uniformity across all lifts. The International Powerlifting Federation (IPF) regulations specify that all discs must weigh within 10 grams of their nominal or face value. This standard is in place to minimize any discrepancies and to maintain a standard of equality in competition.

For instance, if a disc is labeled as weighing 20 kilograms, it must actually weigh between 19.990 kilograms and 20.010 kilograms to be considered valid for competition. This tolerance is essential to ensure that lifters are competing with accurately measured weights, reinforcing the integrity of the sport.