We can look at the load capacity chart and determine that at 45 degrees, the crane is able to handle 5,000 lbs. If the crane remains in the same 80 degree angle, but it is extended to 20 ft, the maximum weight capacity decreases from 8,000 lbs to 3,500 lbs.Īs an additional example, let’s take the crane with no additional extension at a 45 degree angle. To achieve the 8,000 lbs load capacity, the crane must be at an 80 degree angle, with no extra extension (in this case, the boom will be raised 13 ft, without extension). In our example, the crane featured is a JOMAC STC-80 telescoping crane, with a maximum load capacity of 8000 lbs. The crane weight capacity will be the maximum load that the crane can handle at a certain extension and angle.Ī simple formula to keep in mind when it comes to interpreting a capacity chart is angle + extension is the method of determining a load capacity for a truck crane. The crane angle will refer to the angle at which the crane is lifting the cargo or material. The crane extension refers to the actual height of the tip of the boom in relation to the base of the crane.
The capacity chart will provide the maximum weight load that a truck crane can handle, specified with three different parameters: crane extension, crane angle, and weight capacity. The absolute best resource for determining the functional weight that your service truck crane can lift is the manufacturer capacity chart (typically located on a manufacturer spec sheet.) In most instances, the crane’s max load can be achieved with a very short extension in proximity to the truck body, requiring the truck body to be extremely close to the cargo or item you are intending to lift and move.įor more practical capacity ratings, you should direct your attention to the manufacturer spec manual that will give you far more insight into how much weight your service truck crane is able to lift. This number is important to bear in mind, as it will determine the more practical applications your crane can be used for.
The max load rating on a crane will determine the maximum amount of weight that a crane can lift in a certain position AND at a certain angle. However, the purpose of this post is to explain how to properly read a truck crane manufacturer’s spec sheet to determine the max load of your crane in several different positions (this varies, depending upon the reach and angle of the crane.) So… as you probably expected, there is no clear-cut answer to this question. How much they are able to lift is completely dependent on the type of crane, the size of the crane, and the max load rating specified by the manufacturer. Truck cranes are one of the most useful additions contractors and business owners can add to a service truck body.
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