If a jib is erected but not being used, what should be deducted from the crane's load capacity?

When a jib is erected but not in use, the effective weight of the jib must be deducted from the crane's load capacity because it represents an additional load that the crane must support. Even though the jib is not actively lifting a load, its presence alters the overall stability and balance of the crane.

The effective weight of the jib includes not just its physical weight, but also the impact it has on the crane's center of gravity and moment arms. This can influence how the crane operates under load, as the jib shifts the dynamic forces involved in lifting operations.

It's essential for operators to account for this weight to ensure safe lifting practices, as exceeding the crane's adjusted load capacity can lead to tipping or other failures. Hence, accurately determining the effective weight of the jib ensures that the crane remains within its safe operational limits.