Wavy walls use fewer bricks than a straight wall (2020)
Corrugated cardboard uses less paper than what it would take with flat paper, and the box weighs less.A wavy fiberglass roof uses less cloth and resin, and less reinforcement, than flat composite sheets would require.A wavy roadside guard rail made of sheet metal uses less metal than a flat guardrail.A snowshovel stamped/moulded with kinks in it can be thinner than a solid one....