Layout of Controls

This section provides the meaning of some important terms used in this manual.

Load Radius, Lifting Height

“Load radius” refers to the horizontal distance between the crane's center of rotation and the vertical center of the lifted load.

A “lifting height” is defined for each load radius and refers to the vertical distance between the ground and the bottom of the hook block raised to its uppermost position.

Jib Length, Jib Offset Angle

“Jib length” refers to the center-to-center distance as illustrated in the figure below.

“Jib offset angle” refers to the angle formed by the centerline of an extended jib and the centerline of the boom.

Maximum Lifting Height

“Maximum lifting height” refers to the maximum lifting height allowed.

Boom Length, Boom Angle

“Boom length” refers to the distance from the pivot pin at the foot of the boom to the center axis of the sheave (s) at the boom head.

“Boom angle” refers to the angle formed by the boom's centerline and the horizontal.

Boomlength

Rated Lifting Capacity

“Rated Lifting capacity” refers to the maximum allowable load for a particular boom length and load radius. The weight of load handling device such as hook blocks, slings, etc., must be considered as part of the load and must be deducted from the lifting capacities. The mass of individual hook blocks are indicated in the “INFORMATION AND DATA” section at the end of this manual.

Without Load

“Without load” is used to indicate that no load is being lifted on the hook block.

Stability Section, Strength Section

“Stability section” refers to the section of the rated lifting capacities table in which the major factor for determining lifting capacity is the stability of the crane.

“Strength section” refers to the section of the rated lifting capacity table in which the major factor for determining lifting capacity is the structural strength of the crane. In the rated lifting capacities table, the capacities given above the blue line are those determined based on structural strength, and the capacities given below are determined based on stability.

Over-front, Over-rear, Over-side

“Over-front” refers to the forward working area of the carrier for which lifting capacities have been rated and listed in the rated lifting capacities table.

“Over-rear” corresponds to the rear working area for which lifting capacities have been rated and listed in the rated lifting capacities table.

“Over-side” refers to the working areas not included in “over-front” and “over-rear”

Outrigger Extension Widths

“Outrigger extension width” refers to the horizontal distance between the centers of the right and left outrigger floats when the outriggers are extended.

(1)Full extension width of outriggers (L1)

The distance between outriggers when they are fully extended.

(2)Middle extension width of outriggers (L2)

The distance between outriggers when they are extended halfway.

(3)Minimum extension width of outriggers (L3)

The distance between outriggers when they are not extended.

Over-front, Over-rear and Over-side Capacities

“Over-front capacity”, “over-rear capacity” and “over-side capacity” refer to the rated lifting capacity that can be lifted in the over-front, over-rear and over-side areas, respectively.

360-degree Capacity

“360-degree capacity” means that the lifting capacities are the same regardless of the area in which the load is lifted.

Capacities with Outriggers at Full Extension, Middle Extension and Minimum Extension

(1)Capacities with outriggers at full extension

Lifting capacities specified for a crane supported on fully extended outriggers.

(2)Capacities with outriggers at middle extension

Lifting capacities specified for a crane supported on outriggers extended halfway.

(3)Capacities with outriggers at minimum extension

Lifting capacities specified for a crane supported on outriggers not extended.

Raising Load Just Clear of Ground

This phrase is used to express the operation where the load is hoisted up a few centimeters above the ground and held at that position.