RB Spreader Bars and Lifting Beams 3

Question 1

When lifting a long structural load such as a steel beam using a spreader bar, how many tag lines should be used?

Accepted Answer

Two tag lines — one at each end of the load

Answer

None — the spreader bar provides sufficient load control on its own

Answer

One tag line attached at the heaviest end of the load

Answer

Four tag lines — one at each corner of the load

Question 2

During a test lift, the rigger observes that the spreader bar is not sitting level. What is the most likely cause?

Accepted Answer

Unequal sling leg lengths or the load's centre of gravity not directly below the pick point

Answer

The crane boom angle is too steep for the lift

Answer

The spreader bar's SWL has been exceeded by the load weight

Answer

The slings are manufactured from the wrong material

Question 3

What is the generally accepted maximum angle that sling legs should form with the vertical when used with a spreader bar?

Accepted Answer

60 degrees from vertical

Answer

30 degrees from vertical

Answer

45 degrees from vertical

Answer

90 degrees from vertical (horizontal)

Question 4

A spreader bar is rated at 4.0 tonnes SWL. Due to the sling configuration, a deration factor of 0.75 applies. What is the maximum load that can safely be lifted?

Accepted Answer

3.0 tonnes

Answer

4.0 tonnes

Answer

2.0 tonnes

Answer

5.3 tonnes

Question 5

What is the main advantage of using a spreader bar when lifting a large-diameter thin-walled pipe?

Accepted Answer

It prevents inward compressive forces from the converging slings from crushing the pipe

Answer

It allows the pipe to be lifted at higher crane speeds safely

Answer

It eliminates the need for tag lines when handling pipe

Answer

It increases the hook height available for the lift

Question 6

What must a Lift Plan include when a spreader bar is to be used in the operation?

Accepted Answer

The SWL, sling configuration and angles, estimated load weight, and load's centre of gravity

Answer

The colour, age, and country of manufacture of the spreader bar

Answer

The crane manufacturer's model number and boom configuration only

Answer

The number of previous lifts the spreader bar has been used for

Question 7

After completing a rigging operation using a spreader bar, what is the correct post-use procedure?

Accepted Answer

Clean the bar, inspect it for damage, and store it correctly in a designated area

Answer

Leave the spreader bar rigged ready for the next lift to save time

Answer

Return the spreader bar to the crane operator's cabin for storage

Answer

Submit the bar for immediate recertification after every single use