cranes and derricks april 3

Question 1

What are the most frequently cited citations?

Answer 1

550(a)(15)(i) Clearances between power lines & equipment (29)

 550(a)(9) Swing radius at rear of crane barricaded (25)

 550(a)(6) Hoisting machinery – annual inspection (21)

 550(b)(2) Cranes must be in compliance with ANSI B30.5 – 1968 (18)

 550(a)(1) Manufacturer’s specifications (16)

Question 2

common crane failures

Answer 2

1.Side loading the boom 2.Crane out of level 3.Impact loading the boom 4.Recoil

Question 3

Clearances between power lines & equipment (29)

Answer 3

550(a)(15)(i)

Question 4

Swing radius at rear of crane barricaded (25)

Answer 4

550(a)(9)

Question 5

Hoisting machinery – annual inspection (21)

Answer 5

550(a)(6)

Question 6

Cranes must be in compliance with ANSI B30.5 – 1968 (18)

Answer 6

550(b)(2)

Question 7

Manufacturer’s specifications (16)

Answer 7

550(a)(1)

Question 8

According to The Crane Fatality Study; The Center To Protect Worker Rights, how many crane fatalities are there?

Answer 8

502 fatalities

Question 9

What are the crane fatalities according to the center to protect workers rights?

Answer 9

198 Power line contact  58 Boom assembly / dismantling  41 Boom buckling  37 Upset / overturn  36 Rigging Failure  22 Overloading 22 Struck by moving load  21 Related to man baskets  17 Working within swing radius  11 Two-blocking  7 Hoist limitation

Question 10

power line contact

Answer 10

198

Question 11

boom assembly/dismantling

Answer 11

58

Question 12

boom buckling

Answer 12

41

Question 13

upset/overturn

Answer 13

37

Question 14

rigging failure

Answer 14

36

Question 15

overloading

Answer 15

22

Question 16

struck by moving load

Answer 16

22

Question 17

related to man baskets

Answer 17

21

Question 18

working with swing radius

Answer 18

17

Question 19

Two-blocking

Answer 19

11

Question 20

hoist limitation

Answer 20

7

Question 21

power-line contact

Answer 21

39%

Question 22

Boom assembly/dismantling

Answer 22

12%

Question 23

Boom buckling

Answer 23

8%

Question 24

upset / overturn

Answer 24

7%

Question 25

rigging failure

Answer 25

7%

Question 26

overloading

Answer 26

4%

Question 27

struck by moving load

Answer 27

4%

Question 28

What are the six crane errors due to operator error.

Answer 28

1. Inexperienced, violent control movements 2. Boomed out beyond safe working radius 3. Overload 4. Overturned while traveling 5.Out of level 6. Boom collapsed backwards

Question 29

Operator error accounts for what percent of crane accidents?

Answer 29

33.1%

Question 30

What are the crane accidents associated with support failure.

Answer 30

1. Ground gave way beneath blocking 2. Soft footing with crawler cranes 3. Outrigger blocks fail

Question 31

What percent of crane failures are associated with support failure?

Answer 31

31.5%

Question 32

What percent of crane failures are associated with failure to use outriggers?

Answer 32

22.6%

Question 33

What percent of crane failures are due to MACHINERY & STRUCTURAL FAILURE?

Answer 33

11.2%

Question 34

What are the crane accidents associated with MACHINERY & STRUCTURAL FAILURE?

Answer 34

1. Boom hoist failure 2. Brake failure 3. Booms 4. Outriggers

Question 35

Crane accidents associated with high winds are what percent?

Answer 35

1.6%

Question 36

What is the accident associated with high winds and cranes?

Answer 36

Wind force sufficient to topple the boom or crane

Question 37

What is the total percent of accidents that are associated with the operator for crane use?

Answer 37

1. OPERATOR ERROR 33.1% 2. SUPPORT FAILURE 31.5% 3. NO OUTRIGGERS 22.6% =87.2

Question 38

operator training requirements

Answer 38

1. Be required to pass a practical operating examination on the specific type of equipment to be operated 2. Pass a written examination 3. Demonstrate ability to read, write, comprehend arithmetic skills and load capacity chart usage….. 4. Demonstrate understanding of ANSI B30.5 and Federal, State, & local requirements

Question 39

What does NCCCO stand for?

Answer 39

National Commission for the Certification of Crane Operators (NCCCO)

Question 40

OSHA recognizes ___ as independent verification of meeting training requirements

Answer 40

CCO certification

Question 41

Cranes built before the ___ were built more massively than today’s cranes

Answer 41

1970's

Question 42

Operators used to operate by “the seat of the pants” by allowing the rear of the crane to _____.

Answer 42

lift off the ground

Question 43

Today’s cranes will likely ____ before they will tip (this could occur on a later lift and at loads below the actual load ratings)

Answer 43

fail structurally

Question 44

Spooling of cable on drum should be ____.

Answer 44

smooth and even

Question 45

a. Crane operations must comply with manufacturer’s ____.

Answer 45

specifications and limitations

Question 46

b. Where manufacturer specs not available, limitations must be based on determinations by an ________.

Answer 46

engineer qualified in the field of cranes.

Question 47

c. No modifications allowed without written approval of ____.

Answer 47

manufacturer

Question 48

d. ______, recommended operating speeds & special hazard warnings must be conspicuously posted on all equipment.

Answer 48

Rated load capacities

Question 49

f. Accessible areas within the swing radius of the rotating superstructure must be ____ to prevent an employee from being struck or crushed.

Answer 49

barricaded

Question 50

g. Hand signals prescribed by ___ must be used.

Answer 50

ANSI

Question 51

Illustration of ____ must be posted at job site.

Answer 51

hand signals

Question 52

i. All operator cab windows must be of ___ and be free of distortion or obstructions.

Answer 52

safety glass

Question 53

All crane cabs must have an _______or greater.

Answer 53

in-service 5BC fire extinguisher

Question 54

k. All employees must stay clear of all loads being _______.

Answer 54

hoisted or suspended

Question 55

2. General protocol for cranes and derricks.

Answer 55

a. Daily inspection by a competent person (operator) prior to use b. b. Monthly inspection by a competent person (more mechanically oriented) c. Annual inspection by qualified person or third party d. All must be written and kept on jobsite

Question 56

3. Wire rope must meet ANSI safety factors:

Answer 56

a. In running ropes, 6 broken wires in 1 lay or 3 broken wires in 1 strand of 1 lay. b. Wear of 1/3 of the original diameter of outside individual wires. c. Evidence of any heat damage. d. Kinking, crushing, bird caging or other distortion of the rope. e. In standing ropes, more than 2 broken wires in 1 lay beyond end connections or more than 1 broken wire in end connections. f. Three or more broken wires in one lay in standing ropes