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Question #796

Unless otherwise specified by the manufacturer, the maximum permissible load sinking for timber loader cranes during the leakage test is:

O ile wytwórca nie określi inaczej maksymalna dopuszczalna wartość opadania ładunku żurawi przeładunkowych do drewna podczas próby szczelności wynosi:

a
10 mm

10 mm

b
2.0 % of the given outreach

2,0 % danego wysięgu

Correct answer

c
2 % of the crane's maximum hydraulically achieved outreach

2 % maksymalnego wysięgu żurawia realizowanego hydraulicznie

d
4 % of the rated capacity expressed in mm

4 % udźwigu nominalnego wyrażone w mm

Why?

Permissible load sinking (opadanie ładunku) is 2.0% of the outreach at which the test is performed, per minute, unless the manufacturer specifies otherwise. The limit is therefore based on the given outreach, not on the maximum hydraulic outreach: for a test at a shorter outreach, option c would allow too much sinking. A fixed 10 mm or a percentage of rated capacity expressed in mm is not the criterion.

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