According to ASME B30.3, what should a crane ideally be plumbed to?

The standard ASME B30.3, which governs the safety and operation of tower cranes, specifies that a crane should ideally be plumbed to a ratio of 1 to 500. This means that for every 500 units of vertical height, the crane should be within 1 unit of horizontal displacement. The purpose of this requirement is to ensure stability and reduce the risk of tipping or structural failure. A plumbed crane is crucial for maintaining balance, particularly when lifting loads that can shift or sway, helping operators manage risks effectively.

In terms of balancing the crane's load and ensuring safe operation, the 1 to 500 ratio is deemed optimal, providing adequate tolerance limits for vertical alignment while minimizing the risk of accidents or equipment malfunction.