Question #515
Unless the manufacturer specifies otherwise, what is the minimum clearance at which the hook block must stop below the lowest components of the overhead travelling crane?
O ile wytwórca nie określi inaczej, minimalna odległość w jakiej musi zatrzymać się zblocze hakowe, licząc od najniżej położonych elementów suwnicy wynosi:
a
5 cm
5 cm
b
10 cm
10 cm
c
20 cm
20 cm
Correct answer
d
15 cm
15 cm
Why?
After the hook block (zblocze hakowe) stops, at least 20 cm of clearance must remain below the crane's lowest components, unless the manufacturer specifies otherwise. This clearance protects against the block striking the structure. Even 15 cm is insufficient under the condition stated in the question.