What is the maximum angle between the lifting cable and vertical when using two lifting lugs?

The maximum angle between the lifting cable and the vertical when using two lifting lugs is 30 degrees. This standard is established to ensure that the lifting force remains efficient and safe while minimizing the risk of overload on the lifting equipment and the structure being hoisted.

When the cable is angled too high away from the vertical, the load distribution changes, typically increasing the horizontal force components, which can lead to instability during the lifting process. A 30-degree angle strikes a balance between effective load handling and minimizing the risk of these adverse effects. This is particularly important in situations involving underground storage tank installations or retrofitting, where precision and safety are paramount. Adhering to this guideline helps prevent accidents during lifting operations and ensures compliance with safety regulations.

Depending on the context and considerations of lifting protocols, angles that exceed 30 degrees can lead to compromises in safety and stability, underscoring the importance of following established practices in lifting procedures.