cranes safety1

8/6/2019 Cranes Safety1

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OSHA Office of Training & Education 1


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10

50000


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( * 1.5 (

D()

D x 1.5


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LESSON 2LESSON 2


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OTHER MATERIAL EQUIPMEN

HANDLINGTOverhead and gantrycranes (1910.179)

LESSON 2LESSON 2

Crawler locomotiveand truck cranes(1910.180)

LESSON 2LESSON 2


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OTHER MATERIAL HANDLING

EQUIPMENTDerricks (1910.181)

LESSON 2LESSON 2

Helicopters (1910.182)


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()


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Planning Before Start-Up

1.5

C t t P


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Competent Person

The competent person mustinspect all machinery andequipment prior to eachuse, and during use, tomake sure it is in safeoperating condition.

If it needs fixing, take it outof service and dont use it

until it is fixed

Broken

Track


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Load Capacity - Speed - Warnings

Make sure the craneoperator can see the: Rated Load

Capacities Operating Speeds Special Hazard

Warning or

Instruction

Load Rating Chart


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Load Limiting Factors

Not level

Wind

Side loads

On its wheels

Lifting over the side

Use of extensions, jibs and other attachments

Limits of wire rope, slings and lifting devices

L d E l


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Load Example 30 ton crane

Will lift 60,000 pounds at 10 feet from thecenter pin of the crane

Based on level surface, no wind, andoutriggers fully extended

At 25 feet from the center pin with an 80 footboom, the capacity is only 14,950 pounds

At 74 feet from the center pin, the capacity isonly 4,800 pounds


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Improper Load


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Improper Load

Improper loads or speeds can resultin the tipping of the crane

I L d


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Improper Load

Improper Load


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Improper Load


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Hand Signals


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An illustration ofthe signals mustbe posted at the

job site

Hand Signals


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Guard Moving Parts

UnguardedChain Drive

Guard moving parts such as gears or belts

Swing Radius


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Swing Radius

Stay out of the swing radius of the crane Make sure there are barrier guards showing swing radius


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Operator Visibility

Broken Window

Make sure broken windows or other obstructionsdo not prevent the operator from seeing

L dd


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Ladders

Ladder

Use ladders to get to the upper portion of the cab

Guardrails


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Guardrails

Runways and steps need to have guardrails,handholds and slip resistant surfaces

S d d L d


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Suspended Loads

Dont stand under suspended loads

Boom Angle Indicator


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Boom Angle Indicator

A boom angle indicator must be on the crane


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Boom Angle Indicators


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Supporting Surface


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Supporting Surface

Cranes must be on a firm supportingsurface and level within 1 percent


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Sh


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The grooves must be smooth and free from surfacedefects which could cause rope damage

Sheaves


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What to Inspect

Correct air pressure and no leaks Tires properly inflated

Clearance for tail swing Wire rope wear Physical damage to crane

Loose or missing hardware, nuts, or bolts Fluid leaks

Worn Part


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Worn Part

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Conductregularinspections

of tires forexcessivewear ordamage

Tire Inspections


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S


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Summary An unstable load, lack of communication, lack oftraining, and inadequate maintenance or inspection aremajor contributors to crane accidents.

Operators or others working in the area can bevictims to struck by" and "caught in" injuries.

Contact with power lines causes many accidents. A competent person must inspect a crane regularlyto insure it is in proper order.

Planning and training reduces accidents.


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