When you order a Donati jib crane, you have three options for the base. This decision is based on your floor depth, the floor is always the customers responsibility.
To attach the jib column directly to your floor. This option is if you know you have a good depth to your existing floor, this may be from previous calculations on the floor or past testing that has been carried out.
To use ground anchors in concrete. You will need to have a hole dug and concrete poured into the area where you would like the jib crane, the concrete is poured around the anchors, as shown in the picture below.
Once completed, the jib column is lowered on to the bolts, that are now sticking out of the ground. This is a good option for anyone with an unsuitable flooring. It also has the benefit of not taking up too much room.
To spread the load with an oversized base plate. This option is the most common. It gives you peace of mind that all the weight is dispersed, so better for your floor. It is also a lot less hassle then getting someone in to pour concrete.