The Simio Crane Library is a collection of objects designed for modeling multiple cranes operating simultaneously in one or more bays. The Crane library may be used in conjunction with the Simio Standard Library, or with custom libraries. The objects (Bay, Bridge, Cab, Lift, and end effecter) are combined together to model multiple cranes moving in a bay. A Crane movement occurs by first rising up from the pickup node to a specified travel height, traveling laterally at that height, and then lowering down to the specified drop-off node. All travel is done without the need to explicitly draw a network. The Crane library fully supports independent acceleration/deceleration and the ability for one crane to cause another blocking crane to move out of the way.