Cranes,%20Derricks,%20Hoists,%20Elevators,%20and%20Conveyors%20-%20Subpart%20N%20Section%206 - PowerPoint PPT Presentation

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Cranes,%20Derricks,%20Hoists,%20Elevators,%20and%20Conveyors%20-%20Subpart%20N%20Section%206

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... 1- May only be used when there is NO OTHER safe means of performing the work! ... Inspection and testing before use and every 3 months. The Most Frequent ... – PowerPoint PPT presentation

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Title: Cranes,%20Derricks,%20Hoists,%20Elevators,%20and%20Conveyors%20-%20Subpart%20N%20Section%206


1
Cranes, Derricks, Hoists, Elevators, and
Conveyors - Subpart NSection 6
  • Robert Poole
  • St. Paul Fire Marine Insurance Company

2
  • Cranes and Derricks - 1926.550
  • Helicopters - 1926.551
  • Material Hoists, Personnel Hoists, and Elevators
    - 1926.552
  • Base-Mounted Drum Hoists - 1926.553
  • Overhead Hoists - 1926.554
  • Conveyors - 1926.555

3
CRANES
..and a few other pieces of equipment
4
Cranes and Derricks - 1926.550
  • General Requirements
  • Follow manufacturers specs and limits
  • Capacities, speeds, warnings, instructions posted
    in view of operator
  • ANSI standard hand signals posted at site
  • Annual inspection documented

5
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6
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7
Improper footing
8
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9
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10
Wire ropes must be inspected prior to use each
day.(Synthetic webbing slings must be inspected
according to its specific standard 1926.251(e).)
11
Wire Rope Removed From Use When
  • 6 broken wires in 1 lay, 3 in 1 strand
  • for example 3/4 inch, 6 x 19 IWRC is one lay or
    six inches.
  • Outer wires worn 1/3 original diameter
  • Birdcaged, crushed, kinked
  • Heat damaged
  • Reductions from nominal diameter

12
Sheave grooves may become grooved if cables
nominal diameter is reduced, indicating wear.
13
Cranes and Derricks - 1926.550
  • Belts, gears, shafts, pulleys, etc. guarded
  • Swing radius barricaded
  • Exhaust pipes guarded or insulated
  • Exhaust in enclosed spaces - air monitoring

14
General Requirements
  • Windows in cabs - no distortion
  • Ladder or steps to cab roof
  • Guardrails, handholds, steps to cab
  • Anti-skid walking surfaces
  • Fire extinguisher of 5BC rating

15
Crane Electrical Hazards
  • If operator has no clear view, spotter needed
  • Work near transmitter towers may require
    grounding cables

16
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17
At LEAST 10 ft. from wires
18
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19
Cranes and Derricks - 1926.550
  • General Requirements
  • NO modifications or additions without
    manufacturers written approval.
  • All employees clear of suspended loads at all
    times.

20
Marks first crane
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22
Crawlers and Locomotives
  • Compliance with ANSI B30.5-1968
  • Record of inspections on file
  • Jibs have positive stops to prevent overbooming
    of more than 5 degrees above the straight line of
    the jib

23
Tower Cranes
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25
Slewing unit of tower crane
26
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28
Hammerhead Tower Cranes - 1926.550
  • Employees tied off on horizontal booms
  • Buffers at each end of trolley
  • Limit switches in place
  • Manufacturers recommendations
  • Adequate clearances maintained

29
Suspended Personnel Platforms
30
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32
Personnel baskets (Personnel platforms)
  • Rule 1- May only be used when there is NO OTHER
    safe means of performing the work! Personnel
    baskets are the tool of last resort.

33
Personnel basket crane specs
  • Brakes set, level within 1 of grade
  • Derate machine capacity 50
  • Load line safety factor 7-10 times
  • No live boom machines
  • Telescoping boom length indicator
  • No free fall- power up power down

34
Positive anti-two block device
35
Anemometer
36
Cranes and Derricks - 1926.550
  • Suspended Personnel Platforms Design
  • Support 5 times intended load
  • Guardrail, enclosed from midrail to toeboard,
    grab rail installed inside
  • Hard hats and overhead protection
  • Welding by qualified welder
  • Weight of platform and rated capacity marked

37
Suspended Personnel Platforms - 1926.550
  • Master link or shackle for bridle legs
  • Eyes fabricated with thimbles
  • Rigging used only for personnel basket
  • Basket landed or secured before entry
  • Employees tied off to basket

38
Helicopters
39
Helicopters - 1926.551
  • Federal Aviation Administration regulations
  • Briefing (includes emergency drop zone)
  • Slings and tag lines, cargo hooks
  • Personnel Protective Equipment
  • Hooking and unhooking (static electricity)
  • Signal systems, visibility, communication
  • Approach distance and approaching
  • Fires

40
Air crane at McKee Foods
41
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42
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43
Material Hoists, Personnel Hoists, and Elevators
- 1926.552
  • General Requirements
  • Manufacturers specifications and limitations
  • Capacities, speeds, hazard warnings posted
  • Removal of damaged wire rope

44
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46
Material Hoists
  • Operating rules established and posted at
    operator station - No riders
  • Entrances to hoistways protected
  • Overhead protection - cages, platforms, operator
    stations
  • Hoist tower enclosures
  • Car arresting devices in case of rope failure
  • Designed by professional engineer

47
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49
Personnel Hoists and Elevators - 1926.552
  • Tower anchored to structure every 25 ft.
  • Cars permanently enclosed on all sides except
    entrance
  • Doors or 78-high gates at each level
  • Electric safety contacts on doors/gates
  • Capacity and data posted
  • Emergency stop switch inside car
  • Inspection and testing before use and every 3
    months

50
The Most Frequent Citations
  • Failure to guard swing radius
  • Operating near power lines
  • No load chart
  • Unnecessary use of personnel basket

51
This lift should have been stopped before it got
this far
52
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56
What Questions Do You Have On Cranes, Derricks,
Hoists, and Conveyors?
  • Now I have a few questions
  • Please turn to the Crane Test page in your
    handout material

57
Crane, Derricks, Hoists
  • 1. The CLOSEST crane approach to live power
  • line?
  • 2. Suspended personnel platforms may ONLY
  • be used when?
  • 3. Are broken wires allowed?
  • 4. The size extinguisher for a crane?

58
Answers
  • 1. No CLOSER than 10 feet
  • 2. When theres no other safe way to work
  • 3. No more than 6 in 1 lay, 3 in 1 strand
  • 4. 5 BC Extinguisher (minimum)

59
Take a break !
  • Be back in TEN minutes
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