What is the device’s performance chart?

Boom lift lifts are capable of rotating the base, lifting and extending their boom booms to help the operator reach difficult-to-reach positions at the site. The work area that each boom lift model has access to is a combination of vertical height and horizontal reach – often referred to as the Range of Motion, or line. Working envelope


Photos: The equipment activity chart – Range of Motion

The boom lift operation charts are available in the Operating Guide that comes with the device, or in its specifications sheet (equipment catalog). These graphs are in a 2-D shape of a bow, showing graphs of the active area of the booms so that the accessibility of the device can be easily identified. This is an extremely useful tool in choosing the most suitable lifter for the job at the site.


The device name usually reflects the maximum floor height of the device, for example the Model Genie S-60 XC is the name of a 60ft (about 18m) telescopic boom lift. As a general rule, the maximum horizontal reach of a straight boom boom is usually less than 9ft from the height to the floor. However, to ensure safety, the operator must always refer to the boom lift’s operating chart and operating instructions before starting work.

Many boom lift models have the same basic specifications as height to floor, horizontal reach, but there are significant differences in their performance charts. This has the potential to affect workers’ productivity as well as their ability to access a particular job position.

Although most boom lift lifts have quite “smooth” arc performance graphs, there are sometimes some graphs with a saw-tooth contour. At these positions, the operator may have to retract or reposition the boom booms so that further work can be performed as the platform moves along the outer edge of the work contour. Another feature that can be found in this chart is the ability to check if the boom lift has negative reach or not. This is important in specific applications such as bridge testing, mining or general surface related applications.

saw Tooth 1

Hình ảnh: (1): Đường bao hình răng cưa

(2): Thiết bị có tầm với âm

Currently, there are many activity charts that provide additional guidance on double load operating zones (there are 2 types of payloads). Dual load boom lifters, such as the Genie Xtra Capacity range, offer two unlimited and limited load capacities to the working platform, depending on the boom position. Operator’s unlimited load capacity is a term used by most manufacturers to designate load capacity that applies to all working positions in equipment performance charts. Operator floor limited load capacity is a term used by some manufacturers to refer to the restricted load for certain work area segments on the equipment performance chart, usually zones the farthest new range area on the boom action chart.

dual Zone

Image: Light green zone (1) is an area with a maximum load capacity of 454kg, while that of a dark green zone (2) is an area with maximum reach, but the load is limited to 300kg.

Biểu đồ hoạt động cho từng dòng sản phẩm đều có sẵn trong quyển Hướng dẫn vận hành và bảng thông số kỹ thuật của sản phẩm, và có thể xem trực tiếp trên website của nhà sản xuất. Đối với xe nâng boom lift hãng Genie, vui lòng truy cập trang web hoặc

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