TM 5-3810-307-10
2-4.1
Load Charts.
Load Charts represent the absolute maximum allowable loads, which are based on
either tipping or structural limitations of the crane under specific conditions. Knowing the precise
load radius, boom length, and boom angle should be a part of your routine planning and operation.
Actual loads, including necessary allowances, should be kept below the capacity shown on the
applicable load chart.
You must use the appropriate load chart when determining the capability of the
crane in the configuration required to perform the lift.
Maximum lifting capacity is available at the shortest radius, minimum boom length
and highest boom angle.
Do not remove the load charts from the crane.
2-4.2
Work Site.
Prior to any operation, you must inspect the ENTIRE work-site, including ground
conditions, where the crane will travel and operate. Be sure that the surfaces will support a load
greater than the crane's weight and maximum capacity. Barricade the area where the crane is
working and keep all unnecessary personnel out of that area.
Be aware of all conditions that could adversely affect the stability of the crane.
Use caution when operating in the vicinity of overhanging banks and edges.
Wind and other factors such as boom length, boom angle, size and weight of load,
etc., can affect crane stability and crane structures. If wind velocity exceeds 20 mph (32 km/h),
rated loads and boom lengths shall be appropriately reduced. Practical working loads for each
particular job and lift shall be established by the user depending upon conditions that exist at the
time a lift is being made. Appropriate capacity reductions shall be made whenever conditions
indicate the possibility that a loss of crane stability or structural damage could occur. The crane
should not be operated at winds above 30 mph (48 km/h).
2-4.3
Lifting Operations.
If the boom extension, jib, or auxiliary boom nose is to be used, ensure the electrical
cable and the weight for the anti-two block switch are properly installed and the LMI is programmed
for the crane configuration. Refer to the LMI handbook supplied with the crane.
Before lifting, position the crane on a firm surface, properly extend and set the
outriggers, and level the crane.
If the boom extension or auxiliary boom nose is to be used, you must ensure that
the cable for the LMI system is properly connected at the junction box located on the boom nose.
Depending on the nature of the supporting surface, adequate cribbing may be
required to obtain a larger bearing surface.
2-5
