TM 5-3810-307-10
Use tag lines whenever possible to help control the movement of the load.
When lifting loads, the crane will lean toward the boom and the load will swing out,
increasing the load radius. Ensure the load capacity chart is not exceeded when this occurs.
Be sure the hoist line is vertical before lifting. Do not subject the crane to side
loading. A side load can tip the crane or cause it to fail structurally.
Do not strike any obstruction with the boom. If the boom should accidentally contact
an object; stop immediately. Inspect the boom. Remove the crane from service if the boom is
damaged. Never push or pull with the crane boom.
Avoid sudden starts and stops when moving the load. The inertia and an increased
load radius could tip the crane over or cause it to fail structurally.
Load chart capacities are based on freely suspended loads. Do not pull posts,
pilings, or submerged articles. Be sure the load is not frozen or otherwise attached to ground
before lifting.
Use only one hoist at a time when lifting loads.
Always use enough parts-of-line to accommodate the load to be lifted. Lifting with
too few parts-of-line can result in failure of the wire rope.
Never operate the crane with less than two wraps of wire rope on the hoist drum.
2-4.4
Counterweight.
On cranes equipped with removable counterweights, ensure the appropriate
counterweight sections are properly installed for the lift being considered.
Death or serious injury could result from being crushed by moving machinery. Clear
all personnel from the counterweight and superstructure area before raising or lowering the
counterweight or when rotating the superstructure.
To reduce the crushing hazard and to prevent death or serious injury, always clear
all personnel from the counterweight area before moving the counterweight.
Federal law prohibits modification or additions which affect the capacity or safe
operation of the equipment without the manufacturer's written approval. [29CFR 1926.550]
Do not add material to the counterweight to increase capacity.
2-4.5
Multiple Crane Lifts.
Multiple crane lifts are not recommended. Any lift that requires more than one crane
must be precisely planned and coordinated by a qualified engineer. You, the operator, shall be
responsible for assuring that one qualified signal person is used, communication between all parties
is maintained, and load lines are kept directly over the attach points to avoid side loading and
transfer of loading from one crane to another.
2-7
