safety concern in const

8/14/2019 safety concern in const

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Accidents during construction projects alsoincreases project cost.

Indirect cost of insurance, inspection andregulation are increasing rapidly due toaccidents

So the project manager try to execute theproject with out any major accidents


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STEEL ERECTION

SCAFFOLDINGEXCAVATION

ROOF WORK

MACHINES

PAINTING

DEMOLITION


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Contact with power lines

Overturns

Falls

Mechanical failures


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1. Operators

2. Persons at CraneSite


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Make sure the craneoperator can see the: Rated Load

Capacities Operating Speeds Special Hazard

Warning orInstruction


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Refer to shipping ticket or other documentation

Ensure lift calculations are correct

Ensure load is within load chart rating for boomlength and load radius of crane

Crane is rated by the maximum weight it will liftat a minimum radius and minimum boom length the further from its center point, the less it willlift


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Not level

Wind

Side loads

Condition of wheels

Lifting over the side

Limits of wire rope, slings and liftingdevices


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Improper loads or speeds can

result


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Unguarded

Chain Drive


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Make sure broken windows orother obstructions do not

prevent the operator from seeing

Broken Window


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Dont stand under suspended loads


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Replace rope if there are

3 or more broken wires in one

strand in one laywear exceeds 1/3 of diameter.


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Stay clear from power lines atleast 10 feet


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Level the crane and ensure support surface is firmand able to support the load

Contact power line owners and determineprecautions. Know the location and voltage ofoverhead power lines.

Know the basic crane capacities, limitations, andjob site restrictions, such as the location of powerlines, unstable soil, or high winds.

Make other personnel aware of hoisting activities.Barricade areas within swing radius.Ensure proper maintenance and inspections.Determine safe areas to store materials and

place machinery.


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Scaffolding is a temporary structure used tosupport people and material in theconstruction or repair of buildings and otherlarge structures. It is usually a modular

system of metal pipes (termed tubes inBritain), although it can be made out of othermaterials. Bamboo is still used in some Asiancountries


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In construction industry per year -5,00,ooo

Related to scaffolding 10,000


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Supervisors are responsible to facilitate and/orprovide proper instruction to their workers onprotection requirements and trainingDetermine the type of scaffold required


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1. Ensure grounding on a firm and level base.

2. Maintain the established minimum clearances fromall power lines.

3. Provide a safe access ladder.

4. Ensure scaffold has a platform perimeter handrail.

5. Anchor or tie a free standing scaffold according tolegislation.


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Minimize tools, material and debris on the platform.

Ensure a hand line with a tool bag for tools is utilized.

When working at 3m (10 ft.), fall protection systemmust be used.

Follow scaffold safe work procedure step by step.


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Must be able support its own weight and

4 times the maximum intended load.Scaffolds must be designed by a

qualified person.

They must and built and loaded within

design.


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Scaffolds musthave baseplates, evenwhen setting on

a concrete floor.Also, the lack of

a base platecould damage

the scaffold leg.


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Scaffold legs mustbe set on baseplates andadequate mudsills.

There is no baseplate and the scrapplywood is notadequate.

The scaffold framecould penetrate theplywood.


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Scaffolds shouldnever be set onbricks, masonry

blocks, etc.These are not

structuralelements and

could crushunder thescaffold load


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Hydro-mobile


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Frames


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Workers must be trained inNature of electrical, fall, and falling

object hazardsCorrect procedures for protection

of aboveProper use of the scaffold

Load capacities of scaffolds


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Must have an 18platform.

Must haveguardrails or otherfall protection

BAD!

GOOD!


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lack of oxygen Inhalation of toxic materials

Fire

Moving machinery near the edge ofthe excavation can cause a collapse

Accidental severing of undergroundutility lines


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Excavating is one ofthe most hazardousconstructionoperations

Most accidents occurin trenches 5-15 feetdeep

There is usually no

warning before acave-in


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Employees should be protected from

cave-ins by using an adequatelydesigned

protective system

Protective systems must be able to resistall expected loads tothe system


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A well-designed protective systemCorrect design of sloping and benching

systems Correct design of support systems, shield

systems, and other protective systems

PlusAppropriate handling of materials and

equipment

PlusAttention to correct installation and

removal


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Shield - can be permanent or portable.

Also known as trench box or trench shield.

Shoring - such as metal hydraulic,mechanical or timber shoring system that

supports the sides Sloping - form sides of an excavation that

are inclined away from the excavation


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Slope or bench the sidesof the excavation,

Support the sides of the

excavation, orPlace a shield between

the side of the excavationand the work area


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Cave-in Hazard

This excavation

has inadequatesupport postsand egressaccess

Inadequate protective system


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A trench shield wasbuilt around this

work area


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Using hydraulic jacks theoperator can easily dropthe system into the hole

Once in place, hydraulicpressure is increased tokeep the forms in place

Trench pins are installed

in case of hydraulicfailure


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Hazardous Conditions

The weight andvibrations ofthe crane makethis a very

hazardouscondition.

They should

not be workingunder thiscrane.


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When water ispresent in anexcavation it is

extremelyhazardous to enter

Note that these workers arenot wearing hardhats toprotect them from materialsfalling into the trench


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Test excavations morethan 4 feet before anemployee enters theexcavation for: Oxygen deficiency High combustible

gas concentration High levels of other

hazardoussubstances


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A stairway, ladder,or ramp must bepresent inexcavations that are

4 or more feet deep,and within 25 feetof the employees

This ladder does not meetthe requirements of thestandard

The ladder should extend 3feetabove the excavation


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Safe Working Procedure - Excavations

Business Activity Managers

Safety Managers

Managing Director

Employees

Duty Holders

Ensuring compliance.

Providing professional safety advice.

Complying with the requirements.

Responsible for

Co-operating with the requirements.


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New bolt


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4 bolts minimumper column

Repair,

replacement orfield modificationof anchor boltsmust be approved

by the structuralengineer of recordNew bolt not

made!= 2anchor bolts

nottested!


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Column splice


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All must be protected at heights greater

than 2 stories or 30 feet, includingconnectors and deckers

Between 15 and 30 feet: Fall protectionrequired for all with exceptions for:

Deckers in controlled decking zone (CDZ)and

ConnectorsConnectors must be provided and wear

equipment necessary to be able to be tied-off, orbe provided with other means of fall protection


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Means a systemused to arrest anemployee in a fallfrom a working level.

System consists ofan anchorage,connectors, a body

harness and mayinclude a lanyard,deceleration device,lifeline or suitable

combination of


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Safety Nets


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Beamer

BEAMER IN USEBEAMER IN USE


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BEAMER IN USEBEAMER IN USE


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THANK YOUTHANK YOU

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