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Hand and Power Tools for Construction

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Hand and Power Tools for Construction Powered By Docstoc
					Hand and
Power Tools
for construction
Basic tool safety
 Keep  in good condition
 Right tool for job
 Inspect tools
 Operate tools correctly
 PPE needed




                            1a
Construction
tool safety rules
 Safety


 Use   guards

 Use   PPE



                    2a
Switches on power tools
 Positive   ―on-off‖ control

 Momentary     contact ―on-off‖
 control

 Constant    pressure switch


                                   3a
Hand tools
 Hazards   posed

 Misuse


 Improper   maintenance



                           4a
Knives and scissors
 Keep    sharp

 Dull   tools-hazardous

 Use    PPE



                           4b
Power tools
 Electric
 Pneumatic
 Liquidfuel
 Hydraulic
 Powder–actuated




                    5a
General precautions
 Don’t carry by cord
 Never yank the cord
 Heat, oil, and sharp edges
 Disconnect tools
 Safe distance
 Secure work



                               5b
General precautions
 Accidental starting
 Maintained per manufacturer
 User's manual
 Good footing
 Proper apparel
 "Do Not Use‖



                                5c
Guards
 Point of operation
 In–running nip points
 Rotating parts
 Flying chips
  and sparks



                          6a
Hazards of electric
power tools
 Electrocution


 Burns


 Slight   shocks

 Falls

                      7a
Shock protection
 Three–wire   cord

 Double   insulated

 Low–voltage   isolation
 transformer


                            7b
Hazards of abrasive
wheel tools
 Moving   wheel surface

 Throw   fragments

 Disintegrating
 during start–up


                           8a
Use of abrasive wheel
tools
 Inspect closely
 Sound– or ring–test
 Use guard
 Use eye protection
 Turn off the power
 Never use a vise



                        8b
Pneumatic tools
 Compressed   air
 Chippers
 Drills
 Hammers
 Sanders




                     9a
Hazards
 Struck   by attachments

 Struck   by fastener




                            9b
Pneumatic tools
 100   pounds per square inch

 Needs   special device

 Preventfasteners
 from ejection


                                 9c
PPE
 Eye   protection—required

 Faceprotection—
 recommended

    protection—
 Ear
 depends

                              9d
Air hose safety
 Fastened   securely

 Prevent   disconnection

 Added   safeguard



                            9e
Precautions
 Same    as electric cords
 Safety   clip or retainer
 Screensand flying
 fragments
      pointed toward
 Never
 anyone

                              9f
Heavy jackhammers
 Fatigue


 Strains


 Heavy   rubber grips



                         9g
PPE
 Safety   glasses

 Safety   shoes

 Face   shield



                     9h
Liquid fueled-powered
tools
 Gasoline   most common fuel




                                10a
Fuel vapors
 Burn   or explode

     off
 Give
 dangerous
 exhaust fumes




                      10b
Proper procedures
 Handling


 Transporting


 Storage




                    10c
Refilling
 Shut   engine down

 Allow   it to cool




                       10d
Ventilation
 Closed   area

 Effective
 ventilation

 PPE



                  10e
Powder–actuated tools
 Operate   like a loaded gun

         trained
 Specially
 employees




                                11a
Safety precautions
 Explosive/flammable
  atmosphere
 Inspect
 Don’t point
 Don’t load
 Don’t leave unattended
 Hands clear

                           11b
Operation
 Bring   the tool into position

 Pull   the trigger

 Five   pound force



                                   11c
Misfires
 Wait   30 seconds

 Try   firing again

 Wait   30 seconds

 Remove     the load

 Put   in water

                        11d
PPE
 Suitable   eye

 Face   protection




                      11e
Guarding
 Protective    shield/guard

 Will   not fire




                               11f
Varying powder charges
 Power   level

 Excessive   force




                      11g
Defects
 Tagged


 Take out of
 service




                11h
Applying fasteners
 Precautions


 Alignment   guide




                      12a
Hydraulic power tools
 Fluid


 Correct   pressure




                        13a
Jacks
 Lever/ratchet   jacks

 Screw   jacks

 Hydraulic   jacks



                          13b
Safety precautions
 Stop   device

 Load   limit

 Blocked    up

 Slippage


                     13c
Jack set-up
 Firm    level surface

 Correctly
 centered

 Jack    head

 Lift   force

                          13d
Maintenance
 Inspect


 Lubricate


 Abnormal    load

 Antifreeze   liquid
                        13e

				
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