What is the required dimensional relationship between the hoist trolley wheels and the beam flange?

The required dimensional relationship between the hoist trolley wheels and the beam flange is that the wheel diameter must be 1/8 inch to 1/4 inch greater than the width of the beam flange. This specification ensures that the wheels fit securely on the flange while allowing adequate clearance for smooth movement without excessive friction or wear.

If the wheels were equal to the beam flange width, it could lead to binding or improper alignment, which may compromise safety and efficiency during hoisting operations. Conversely, if the wheels were less than the beam flange width, they would not provide sufficient contact, which could also result in instability and potential hazards. Additionally, overlapping by 1 inch is not a standard requirement and would not be practical in terms of ensuring that the wheels properly support and roll along the beam. Thus, the correct dimensional relationship promotes safe and effective operation of the hoist trolley.