Construction safety VI
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This document discusses construction vehicle and crane safety. It provides guidance on proper vehicle maintenance, inspection, loading, and operation to prevent accidents. Key points include checking vehicles daily for water, oil, fuel and tires; using barriers to prevent overturning; not exceeding speed limits; and having qualified operators and signallers when working with cranes. Cranes should be properly anchored and counterweighted, and loads should be lifted vertically without swinging to avoid stability issues.
Construction safety VI
- 1. CONSTRUCTION SAFETY PPT – VI By AVINASH KUMAR GUPTA VEHICLES •reversing blind (don’t depend upon warning hooter) •work near overhead power lines •carrying unauthorized passengers •poor maintenance •overloading •site congestion •poor traffic layout •uneven ground/ debris
- 2. CONSTRUCTION SAFETY PPT - VI PRECAUTIONS – all drivers to have proper National License – training – go up & down the slop, rather than across it where ever practicable – avoid overhead power lines & steep slopes while selecting routes – speed limits clearly displayed – speed limits to be reduced for adverse site condition/ work in progress – unattended vehicle should have engine switched off – tipping bodies should be lowered – safety boots during loading/ unloading
- 3. Goalposts to compel drivers to lower crane and excavator jibs, and avoid contact with overhead power lines
- 4. INSPECTION OF VEHICLES • Daily – water, oil, fuel, lights, inflation of tyre and breaks • (WOFLIB) • Week - Check by fitter • periodic - service centre of manufacturer
- 5. OVERTURNING • use barriers, fixed stops • construction vehicles are unstable & liable to overturn • not to turn at excessive speed • protection from falling objects • if vehicle begins to topple over remain in the seat and do not try to jump clear
- 6. LOADING • loads should be evenly distributed, properly secured and should not project • projections to be shown by attachment of flays • uneven load restrict in loss of control • body of tipper lorry always be lowered
- 7. REMEMBER • If your vehicle begins to topple over, remain in the seat and do not try to jump clear • Keep your vehicle tidy and the cab free from tools and material which might obstruct the controls. • Keep to speed limits. • Do not carry unauthorized passengers. • Do not drive across a slope.
- 8. Movement of Materials • Cranes (a)weight, size & type of load (b)Maximum road or reduces requirement (c)Restriction - overhead powerline, state of the site, type of ground (d)Need of trained operators/ -------- • Erections -skilled workers –follow manufactures instruction
- 9. SIGNALING • must be > 18 years • trained & experienced • signaling system (use telephone) • hand signed should be clear & distinct
- 10. Hand signals to crane drivers should be clear and distinct, and should follow a recognized code or system
- 11. OVERLOADING • mark with safe working load • operator to estimate the load correctly • safe working load with every radius in derricking job – not allow the load to swing – don’t overlok the indicator
- 12. SAFE LOAD INDICATOR • job cranes should have automatic safe load indicator • warn by hooter • take into account the effect of wind/ soft ground conditions • raise the load and stop – guess the load than continue • Don’t overlook the indicator
- 13. Maintenance – wire ropes – brakes – safety devices
- 14. Mobile cranes • liable to overturn or soft, wet ground, during vainer • Adequate clearance for crane’s jib/ boom • 4m from overhead power lines • sufficient counter weight • no drain pipes beneath the outrigger pads
- 15. Tower Cranes • prevent overturning • anchored to the ground, security counterweighted • load to be lifted vertically • avoid large area loads during winds • specify maximum wind • free to rotate @ 3600
- 16. Mobile cranes should operate with outriggers extended to prevent overturning
- 17. Cranes: The need for a safety hook fitted with a latch to prevent displacement of loads is explained to workers
- 18. Good Hoists Erection • erection, extension, dismantling by a specialist/ competent supervisor • tower/ mast to be securely filled to building/ scaffold & maintained vertical • Maximum height of 18m or as specified by manufacturer
- 19. GOOD HOISTS ENCLOSURE • at the ground level of ht of lm • suitable gates • remainder to be enclosed with wire mesh • gates should be filled at every platform level • use safely devices in the in the event of failure of hoist rope or driving gear
- 20. GOOD HOISTS • Loads – safe carrying load to be marked – not to be overloaded – loose bricks not be carried in open hoist platform – no one to be allowed to ride on the platform – carriage of persons through lifts
- 21. GOOD HOISTS Testing & examination • tested & examined after installation • weekly checks to be recorded
- 22. REMEMBER • If you cannot see the load all the time, you need a signaller. • Beware of exceeding the safe working load when trying to free a stuck load. • Never climb up the tower or get onto the boom while the crane is in use. • Make sure the load you are lifting is properly secured