To set up some roof equipment, we are using a Grove GRT880….
To set up some roof equipment, we are using a Grove GRT880. The crane is setup the following way: Fully extended outriggers Counterweight of 22,000 lb Hook block is 9.9′ long and weighs 1,150 lbs Configuration of the jobsite is as follows: Pick up point location (radius) – 65’ pick up point height – 10′ from ground Set point location (radius) – 65’ Set point height – Top of building Five Story building. Each floor is 13’ high 6’ high parapet on roof Rigging Configuration Height of equipment to be hauled – 15’ Weight of equipment to be hauled – 10,000 lbs Lifting beam is W18X46 and is 15 ft long (weight is 46 lb/ft) Wire ropes total weight is 90 lbs (1/2″ diameter ) 1. What boom length do we need to use to set up the load on top of the roof? 2. What is the capacity of the crane in the configuration needed to lift the load on top of the building? 3. Calculate the total load to be lifted. Is the capacity of the crane enough to handle the load? 4. Keeping the same configuration and based on its capacity, what is the maximum load (equipment load only, after subtracting slings, lifting beam or hookblock) that can be safely lifted and setup on top of the building?