The term rooster sheave is a common term in the industry for what is known as the auxiliary lifting sheave or the auxiliary boom head.  It is usually a single sheave unit which connects to the tip of the beam to provide a second hoisting line.

The rooster sheave is especially helpful on heavy lift cranes that have multiple parts of line from the main boom tip.  This single or two-part auxiliary hoist line from the boom tip can allow much faster raising and lowering speeds for lighter loads.

It should be noted that when the rooster sheave is installed, the weight of it and the weight of what is hanging from it (usually a headache ball) needs to be deducted from the capacity at the main boom tip.

The capacity of the rooster sheave is usually limited to the rated line pull of the auxiliary hoist minus the deductions such as line and block weights.  

We want to make sure you have a successful lift and that starts with proper planning and selecting the correct crane for the job.  We can assist in this process by helping to create a lift plan and help size the correct crane for the job. Here at The Dothea Group, we will do our best to meet your schedule needs and we will provide efficient, engineered solutions to better your project, improve safety, and increase your bottom line.

If you are interested in learning more about our engineering services, contact us today.  We can partner with you to ensure a successful bid or project.