A crane boom is the arm that puts a load out over distance, and the figure that matters is never the headline rating. It is what the machine lifts at your radius and your height, which can be a small fraction of the number on the side of the cab. This page is about hiring a boom equipped machine by the day, not buying boom sections or parts.
Capacity is quoted at a radius
Every boom machine carries a load chart, and the chart is the contract. A rating of 30 tons is measured at a short radius with the boom nearly upright. Swing that boom out to where your load has to land and the safe figure can fall to a few tons. Give the yard the distance and the weight, and let them read the chart.
Telescopic against lattice
A telescopic boom extends hydraulically, arrives on wheels, and is set up in an hour, which is why almost all short hires are telescopic. A lattice boom is assembled on site from sections, lifts far more at long radius, and needs several trucks and a day at each end. Length of job decides which one is cheaper.
Knuckle booms and boom trucks for deliveries
A folding knuckle boom on a truck bed is the machine that unloads block, steel or roof trusses and drives away. It reaches less far than a mobile crane and costs a fraction as much, and for most delivery and set down work it is the right answer. Yards quote it by the hour with a travel minimum.
Almost always hired with an operator
Boom equipped lifting machines go out with the yard's own operator, and often a rigger too, because the operator is qualified on that machine and the lift plan sits with them. Expect an hourly rate with a minimum of several hours, plus mobilisation each way, rather than a bare day rate on the machine alone.
Questions people ask about crane boom
Can I rent a crane without an operator?
Rarely, and not from most fleets. Operators are qualified per machine class and the paperwork for the lift sits with them, so bare hire is limited to small pick and carry machines in some yards. Assume operated hire and budget the hourly rate and the minimum.
What does a boom truck cost for one day?
For a straightforward delivery or set down with an operator, day pricing commonly starts near $900 and rises with capacity, reach and travel distance. Short lifts are often billed hourly with a three or four hour minimum, which is cheaper than a full day when the work is over by lunch.
How do I know what capacity I need?
Give three numbers: the weight of the heaviest single piece, the distance from where the machine can stand to where the piece lands, and the height it has to clear. The yard reads those against the load chart. Guessing the tonnage and skipping the radius is what causes a machine to arrive that cannot do the lift.