What is the weight tolerance in JIS G3192 for I-beams?

JIS G3192 allows a weight tolerance of ±5% for hot-rolled I-beams. This accounts for minor variations in rolling thickness, ensuring consistent material quantity in procurement. For example, a 200mm I-beam rated at 25 kg/m may weigh 23.75-26.25 kg/m. The tolerance balances production efficiency with structural accuracy-tighter tolerances would increase costs, while looser ones could compromise load calculations. JIS-certified I-beams are used in Japanese construction, with the tolerance ensuring compatibility with local design codes for earthquake-resistant buildings.