Broderson RT-300-2G - CRANE CAPACITY CHART DEFINITIONS AND RULES

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The Rated Capacity Limiter is designed to stop three crane functions at the limitations of
the capacity chart. These are: BOOM LOWER, TELESCOPE EXTEND and HOIST
RAISE. Great care must be exercised when handling a load near capacity or near a two-
blocking condition. If the boom is being lowered and the Rated Capacity Limiter stops
the boom movement, the load will tend to swing out. If the load is moving too fast, the
sudden stopping by the system can cause dangerous load swinging which can cause
death or injury to personnel or property damage by impact with the load or by the crane
tipping.
W A R N I N G
The Rated Capacity Limiter can suddenly stop the boom lower function, causing
the load to bounce or swing. Use great care when handing a load near capacity
limits or near a two-blocking condition.
CRANE CAPACITY CHART DEFINITIONS AND RULES:
The load radius is the horizontal distance from the centerline of boom rotation (the
center of the turntable when it is level), to the vertical load line with the load suspended.
Because of deflections of the boom and carrier, the load radius increases when a load is
hoisted from its resting place. The load radius may be measured with a measuring tape.
If the desired load radius falls between two load radii on the chart, it is recommended to
use the load radius with the lower capacity and not try to interpolate between the
numbers.
Load capacity ratings on this equipment are given on the basis that operations are to be
conducted on firm and level terrain and in a safe environment. These capacity ratings
are reduced in proportion to the deviation from the prescribed conditions. Any
unfavorable environmental condition, such as soft, sloping or uneven terrain, high wind,
or hazardous surroundings constitutes a deviation.
The main boom capacities are given in direct relation to the radius at which the load is
being handled. Boom extension capacities depend on the boom angle as well as the
load radius. The capacities shown on the capacity chart are the maximum allowable at
the indicated radius. The greatest load that may be handled by the BMC RT-300 is
30,000 pounds (13600 kg), but only at a 10-foot (3.0 m) radius and on outriggers. All
variances of loads and radii of handling are shown on the crane capacity chart. A metal
chart is attached near the operator's seat and a laminated chart is included in the
literature compartment for the express purpose of informing the operator when a load
can or cannot be safely handled.
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