OPERATION OF CONSTRUCTION MACHINERY

 OPERATION OF CONSTRUCTION MACHINERY

 Appropriate Selection and Operation of Construction Machinery
- Construction machineries shall be selected in consideration of safety for space of use, carry in/out
work and fall down, etc.
- Construction machineries shall be selected in consideration of condition of operability, vibration,
noise, exhaust gas, etc.
- Safety passage shall be set according to location of use in order to secure safety of workers.
- Construction machineries shall be operated by qualified personnel and personnel who received
special training.

5.2.2 Operating and Handling Environment
- The necessary lighting shall be secured for hazard prevention at work place.
- Machinery shall be taken measure to protect workers from dust, noise, high/low temperature, etc.
- Workers shall wear protective equipment if it is difficult to apply the measures of machinery.
- Machinery which has a risk of fire by heating, generation of heat, leakage of electricity with the
operation, shall be used after sufficient maintenance.
1) To equip fire extinguisher.
2) To stop machinery before refueling.
- Protection measures shall be taken to high voltage cable which has a risk to be touched. A guide
shall be arranged when implementing work or moving machinery under high voltage cable which
is not protected.
- The minimum distance of 1.2 meters shall be secured between boom and electric cable.
- Safety measures for leakage of electricity shall be taken. Electric equipment shall be installed
inside temporary building, etc.
- The contact method and the emergency treatment method shall be displayed at easily visible

- Following actions shall be taken when an abnormality is found in operation of machinery.
1) To stop working immediately.
2) To inspect the cause of abnormality.
3) To repair the machinery.

Safety Training Operation except for appointed operator shall be prohibited. All appointed operator shall be educated

following items before working.
1) Danger of the machinery, Capacity, Function, Handling and Emergency stop of machinery
and protective equipment
2) Function, Capacity and Handling of the safety device
3) Work procedure, Operation procedure, Sign/Contact of commencement of operation, and
Inspection before commencement of operation
4) Stop of operation, Stop of power supply, Procedure of lock of starter and other necessary
items
5) Emergency measures, Evacuation, Contact in emergency.
6) Putting in order and keeping clean, and other necessary items

 Person responsible for machinery operation

- Responsible operators shall be appointed, and the person except appointed operators shall be
prohibited from using.
- Roles of person responsible for machinery operation shall be specified and conducted.
5.2.5 Safety ensuring in inspection and repairing
- Procedure of stop of operation, stop of power supply, lock of starter and other necessary items
shall be implemented.
- Necessary measures shall be taken for fall and fall down prevention.
- Non-authorized person shall be prohibited from entering the place of inspection/ maintenance
work.
- Inspection/ maintenance work shall be implemented after stopping construction machineries on
flat land.
- Operator shall stop the mortar, put on the brake, lock the turn, etc. of construction machineries.
- Operation device such as attachment, etc. shall be put down on the ground.
- Fall prevention measures shall be taken such as support with prop or block, etc. when inspection/
maintenance needs to be implemented under the boom, bucket, etc. unavoidably.
- Measures shall be taken so that machineries cannot work and move by accident after stopping
function of machinery completely, when implementing maintenance work.

 Instruction to Operator

- New operators shall be instructed in detail regarding conditions, characteristics, considerations of
each construction site by safety education. To implement safety education regularly.
- Close attention shall be taken to the condition of operator's health, and work environment shall
be considered so that operators do not become overwork and lack of sleep, etc.
- Don't allow operator whose condition is not suitable (such as drunken, hangover, extreme fatigue,
etc.) for operation of work to work.

 Inspection and Maintenance of Machineries, Tools and Ropes

- Specified inspection shall be implemented surely.
- Inspection/ oiling/ maintenance in a timely manner (the start of work, the end of work, daily,
monthly, yearly) shall be implemented depending on the machineries and its components.
- Appropriate check list for each machinery shall be prepared, filled out it, and kept it for a
prescribed period as needed.
- A machinery manager shall be appointed, and have operator or inspector to implement following
inspections surely.
1) Pre-operation inspection, Inspection at the end of work, Daily inspection
2) Monthly inspection
3) Annual inspection, Specified self-inspection
- To replace and cut off the wire rope in case of following conditions.
1) More than 10% of wire is fractured in one twist.
2) Reduction of diameter exceeds 7% of nominal diameter.
3) Kink, remarkably loosing shape or corrosion is found.
5.3 TRANSPORTATION OF CONSTRUCTION MACHINERY
5.3.1 Loading and Unloading of Construction Machinery
- The transportation vehicle with the climbing equipment or the specialized device shall be applied
when transferring heavy construction machinery by loading to trailer or truck.
- The loading/ unloading place that is level and firm and has enough space for work shall be
selected when loading or unloading.
- Operator shall put on the parking brake, and put on the drag to tire of the transportation vehicle
when loading or unloading.
- The climbing equipment shall have capacity below;
1) To have strength durable for weight of the machinery, length, width
2) To have the hook to prevent coming-off by rotating of caterpillar or coming-off prevention
device.

 Fixing after the loading

- Machinery shall be fixed at designated point of the load-carrying platform, and the brake shall be
put on and be locked.
- The operation devise such as boom, arm of shovel type construction machinery shall be lower so
as not to exceed height limit, and bucket shall be fixed onto platform of trailer.
- It shall be confirmed that the condition of loading and fixing are appropriate.

 Transportation by self-propellent

- Attention to collapse of road shoulder, etc. shall be paid when travelling on soft ground in the site.

- Machinery shall pass after confirmation of safety by stopping once when passing unprotected
crossing and narrow width place.
- Attention to vertical separation shall be paid when shovel type machinery passes road crossing
structure such as overhead line and bridge girder, etc.

 Mounting and Removal of Operation device (Attachment)

- An operation device shall be mounted or removed in a state of supporting with prop or block, etc.
in order to prevent arm and boom, etc. from moving down and falling down, etc.
- Close attention shall be paid to the nipping prevention by mis operation, excessive operation, etc.
when mounting or removing heavy operation device.

 INSTALLED/ STATIONARY MACHINERY

Selection of Installation Location The installation place shall be selected in consideration of following items.

1) Storm, flood damage or landslide, etc.
2) Safety against a fall, etc.
3) Securing necessary distance between facilities
4) Safety in installation and removal
5.4.2 Protection of Devices such as Motor and Revolving shaft, etc.
- Cover, enclosure, sleeve in motor, revolving shaft, gear, etc. shall be installed.
- Flush type to a stud attached to rotating part shall be applied, or a cover shall be installed.