27952678 Safety Concern in Const (1)

7/30/2019 27952678 Safety Concern in Const (1)

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Accidents during construction projects also increasesproject cost.

Indirect cost of insurance, inspection and regulationare increasing rapidly due to accidents

So the project manager try to execute the project 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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Instability unsecured load load capacity exceeded ground not level or too soft

Lack of communication

Lack of training

Inadequate maintenance or inspection


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1. Operators

2. Persons at Crane Site


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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 otherdocumentation

Ensure lift calculations are correct

Ensure load is within load chart rating forboom length and load radius of crane

Crane is rated by the maximum weight it

will lift at a minimum radius and minimumboom length the further from its centerpoint, the less it will lift


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Not level

Wind

Side loads

Condition of wheels

Lifting over the side

Limits of wire rope, slings and lifting devices


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Improper loads or speeds can result

in the tipping of the crane


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Unguarded

Chain Drive


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Make sure broken windows or otherobstructions 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 are3 or more broken wires in one strand

in one laywear exceeds 1/3 of diameter.


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Stay clear from power lines at least 10 feet


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Level the crane and ensure support surface is firm and ableto support the load

Contact power line owners and determine precautions.Know the location and voltage of overhead power lines.

Know the basic crane capacities, limitations, and job siterestrictions, such as the location of power lines, unstablesoil, 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 to supportpeople and material in the construction or repair ofbuildings and other large structures. It is usually amodular system of metal pipes (termed tubes in

Britain), although it can be made out of othermaterials. Bamboo is still used in some Asian countries


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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/or provideproper instruction to their workers on protectionrequirements and training Determine the type ofscaffold required


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1. Ensure grounding on a firm and level base.

2. Maintain the established minimum clearances from allpower lines.

3. Provide a safe access ladder.

4. Ensure scaffold has a platform perimeter handrail.

5. Anchor or tie afree 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 must havebase plates, evenwhen setting on aconcrete floor.

Also, the lack of abase plate coulddamage the scaffoldleg.


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Scaffold legs must beset on base plates andadequate mudsills.

There is no base plate

and the scrap plywoodis not adequate.

The scaffold framecould penetrate the

plywood.


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Scaffolds shouldnever be set onbricks, masonry

blocks, etc. These are not

structural elementsand could crush

under the scaffoldload


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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 above Proper use of the scaffold Load capacities of scaffolds


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Must have an 18

platform.

Must have guardrails orother fall protection

BAD!

GOOD!


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lack of oxygen Inhalation of toxic materials

Fire

Moving machinery near the edge of theexcavation can cause a collapse

Accidental severing of underground utilitylines


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Excavating is one of themost hazardousconstruction operations

Most accidents occur in

trenches 5-15 feet deep There is usually no

warning before a cave-in


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Employees should be protected from

cave-ins by using an adequately designed

protective system

Protective systems must be able to resist allexpected loads to the 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

EqualsProtection of employees at excavations


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Shield - can be permanent or portable. Also

known as trench box or trench shield.

Shoring - such as metal hydraulic, mechanical ortimber 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 sides of theexcavation,

Support the sides of the

excavation, or Place a shield between the

side of the excavation and thework area


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Cave-in Hazard

This excavation has

inadequatesupport posts andegress access

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 drop thesystem into the hole

Once in place, hydraulicpressure is increased to keepthe forms in place

Trench pins are installed in

case of hydraulic failure


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Hazardous ConditionsThe weight and

vibrations of thecrane make this a

very hazardous

condition.

They should notbe working under

this crane.


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When water is presentin an excavation it isextremely hazardous

to enter

Note that these workers are notwearing hardhats to protect themfrom materials falling into thetrench


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Test excavations more than 4feet before an employee entersthe excavation for:

Oxygen deficiency

High combustible gasconcentration

High levels of otherhazardous substances


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A stairway, ladder, orramp must be presentin excavations that are 4or more feet deep, and

within 25 feet of theemployees

This ladder does not meet therequirements of the standard

The ladder should extend 3 feetabove 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 not


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4 bolts minimum percolumn

Repair, replacement or

field modification ofanchor bolts must beapproved by thestructural engineer of

recordNew bolt notmade!= 2 anchorbolts

tested!

l l


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Column splice


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All must be protected at heights greater than 2

stories or 30 feet, including connectors anddeckers

Between 15 and 30 feet: Fall protection requiredfor all with exceptions for:

Deckers in controlled decking zone (CDZ) and

Connectors Connectors must be provided and wear equipment

necessary to be able to be tied-off, or be provided with othermeans of fall protection


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Means a system used toarrest an employee in afall from a working level.

System consists of ananchorage, connectors, abody harness and mayinclude a lanyard,

deceleration device,lifeline or suitablecombination of these.


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Safety Nets


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Beamer

BEAMER IN USE


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BEAMER IN USE


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THANK YOU

Documents

27952678 Safety Concern in Const (1)