How are hollow sections engineered in cast iron figurative sculptures to reduce weight?

Cast iron figurative sculptures often incorporate hollow sections to reduce weight without compromising structural strength or artistic detail. Engineers and artists achieve this through several techniques. First, the sculpture is designed with internal cavities or voids, strategically placed to minimize material usage while preserving load-bearing capacity. Sand casting, a common method, uses removable cores to create hollow spaces during the molten iron pouring process.

Advanced techniques like lost-wax casting or 3D-printed molds allow for precise control over hollow sections, enabling intricate designs. Additionally, ribbing or internal supports are added to reinforce thin walls and prevent cracking. The result is a lighter sculpture that remains durable and visually striking, making it easier to transport and install while retaining the timeless appeal of cast iron art.