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Figure 97: Safe Use of Ladders

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33 Boom Lift Operation Safety Rules

Figure 98: Personal Protective Equipment (PPE) for Boom Lift Operation

• Working at a height of 2 m. or more requires an additional permit for Working at Height.
• Boom lift operators must have the ability to safely operate boom lifts and properly trained and

certified. Ensure there is a qualified safety watcher to observe the operation.
• Ensure full documentation of each boom lift is maintained such as operations manuals and daily

inspection checklists.
• Boom lifts must have a capacity plate which should be clearly visible. The maximum load rated

capacity must not be exceeded.
• Cordon off the work areas and post warning signs to alert and prevent unauthorised access.
• Secure all tools and equipment when working on a raised platform. Ensure necessary measures

are in place to prevent them falling from the platform.
• Always access the boom lift via the designated entry/exit point and make sure that it is closed

and securely locked when in the boom lift.
• The full-body belt must be worn and a lanyard attached to the boom at all times. Ensure the

required PPE is used appropriately and consistently.
• Maintain a distance of not more than 30 cm. from the lift edge to prevent overreaching.
• Before working near power lines, arrange for a temporary insulation to be installed or the elec-

tricity to be switched off.
• Boom lifts must not be used on slopes or ramps. They are best suited for flat and level surfaces.

Lower the boom lifts completely and park in designated areas after use.

Figure 99: Common Boom Lift Hazards

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34 Electrical Safety Rules

Figure 100: Personal Protective Equipment (PPE) for Electrical Work

Electrical systems including supplies and distribution systems are constantly energised and pose dan-
gerous electrical hazards, unless properly secured and grounded according to the following five safety
rules:

1. ENSURE the electrical installation and equipment are disconnected from the electricity supply.
2. SECURE against accidental or automatic re-connection. Implement all the necessary measures to
prevent the accidental re-connection of the electrical installation.
3. CHECK that the electrical installation is dead and use a voltage detector to verify the absence of
operating voltage of such installation.
4. CONNECT the dead parts to the earth. This is to protect the parts between the two earthing de-
vices against electrical shocks.
5. COVER for protection from adjacent live parts of the electrical installation to prevent accidental
contact. In this case, safety warning signs may be installed.

• Persons undertaking installation, inspection and repair of electrical systems and equipment
must be electrical engineers, electrical, electronic or computer technicians responsible for in-
stalling, removing, relocating, modifying, troubleshooting and resolving issues of electrical
equipment and fuses including installing electrical wiring using zip ties, piping, cable conduits,
connections, carrying out maintenance of electrical equipment and wiring, providing price esti-
mates, and drafting electrical plans and layouts for 1 or 3 phase electrical system that has a
voltage meter not more than 1,000 volts for AC and 1,500 for DC both inside and outside build-
ings connected from low voltage transformers or meters to distribution points regardless
whether they are installed permanently or temporarily. The above persons must be registered
with the Department of Skill Development as professional electricians and submit their certifi-
cates prior to work commencing.

• Working on high voltage systems or electrical maintenance requires an additional permit for
High-Voltage Work.

• Temporary electrical panels and equipment should be stored in a dry and safe place. Do not
store them near gas cylinders, flammable materials, or any other chemicals with the potential to
cause a spill. Ensure that only metal enclosures of standard quality are used and there are no
wires or extension devices connected between the equipment.

• Install roofs for electrical enclosures installed on the outside of buildings.
• Ensure that the chosen breakers are capable of tripping and cutting off power supply at an

appropriate rate and that earth-leakage circuit breakers are installed.
• Electrical devices of standard quality should be used and wired properly. Use copper tape to

tape all electrical connections to make them secure and tight.

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ASIA ERA ONE

• Electrical wires over traffic routes or transportation routes should be adequately protected to
prevent damage from vehicles or transported materials. If the wires are buried in the ground,
ensure that only machines and equipment of standard quality specifically designed for laying
underground cables are used.

• Only double insulated wires must be used.
• Connect earthing wires to main switchboards or other electrical boards including office cabinets

and metal structures of all electrical appliances to protect against an electric shock. The earth
resistance should not exceed 5 ohms.
• Inspect the electrical wires, equipment and appliances before and after use. Do not overload a
circuit and use damaged or defective equipment.
• If any equipment is found to be damaged, report to a direct supervisor immediately and post a
warning sign “Do not Use” and remove from service.
• Electrical inspections, repairs and installations require lockout/tagout after power disconnection
to prevent unexpected energisation while servicing or conducting maintenance.
• Post danger signs in the areas of the electrical control panels and transformers.
• Do not use metal ladders or any conductive materials for electrical work.
• All types of electrical equipment should be tested and tagged with the appropriate safety status
according to colour coding standards.
• Do not use uninspected and uncertified electrical equipment.
• Do not erect a scaffolding, lift, or operate heavy machinery near electrical sources without pro-
tection.
• Ensure that the cables do not roll up when in use.
• Unplug or disconnect cables when not in use.
• S-hooks must be used for hanging electrical wires and air hoses to protect against damage.
• Keep the electrical wires, trailer plugs and connectors away from water.
• Electrical wires should be connected into circuit breakers and cables for electrical appliances
should be connected into earth-leakage circuit breakers.

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Asia Era One Co., Ltd. Page 104 of 120
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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35 Lockout/Tagout Safety Rules

Figure 101: Personal Protective Equipment (PPE) for Lockout/Tagout

Lockout/Tagout is a safety system used to prevent accidents associated with hazardous energy includ-
ing energy sources like electrical and mechanical found in machinery and equipment which can become
dangerous during the servicing and maintenance due to unexpected release of the stored energy re-
sulting in serious injury or death to employees.

• Lock Out is used to isolate energy from a machine or equipment with an energy-isolating device
which can be locked in a safe position to prevent energisation.

• Tag Out is a warning device hung on the equipment that has been locked out or isolated from
the energy source to protect employees against accidents or injuries.

35.1 Lockout/Tagout (LOTO) Procedures

• Ensure that all energy sources of machines or equipment to be operated are identified.
• Notify all affected employees of the locking out.
• Turn off the equipment using normal procedures.
• Eliminate or release any stored energy in the form of pressure or heat. In case of a hydraulic or

gravitational system, secure the system in an off position, ensuring there is no movement
caused by gravity.
• Lock out all energy sources and controls with assigned locks and tags including locking switches
or closing off water valves and tagging out to indicate that the equipment must not be operated
and display information such as name, contact, date, and time.
• Operate the normal controls or procedures to make sure the equipment will not operate after it
has been de-energised. Turn off the equipment before servicing.
• Service the equipment until completed.
• Notify the affected employees before restarting the system.
• Inspect the operational safety, implement the lockout/tagout removal procedures, and turn on
the equipment using normal procedures.

Figure 102: Danger Tags

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Asia Era One Co., Ltd. Page 105 of 120
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Figure 103: 6 Steps of Lockout/Tagout

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Asia Era One Co., Ltd. Page 106 of 120
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36 High Pressure Washer Safety Rules (Over 25 Bars)

Figure 104: Personal Protective Equipment for High Pressure Washing

Ensure that:
• High pressure washer operators are trained on high pressure water jetting operations.
• Operating instructions and manuals have been read and understood by operators.
• Equipment is inspected and tested and in good working condition (including grounding).
• High pressure hoses are in good condition and connected properly.
• Whip checks are installed at each hose connection to increase safety and prevent whipping.
• Assessment of usage of PPE is conducted, which includes:
o Safety helmets and facial visors
o Face shields (tight fitting)
o Water-resistant gloves (chemical resistant gloves as required)
o Raincoats (Laboratory coats as required)
• Push button switches are installed.
• Safeguards are in place to protect tools and equipment in the operating area against damage
from the high water pressure.
• Operating area is cordoned off and safety warning signs are posted. High-pressure washing
curtains may be installed to prevent danger to others.
• The pressure in the washer is completely released when not in use.
• Equipment and tools are serviced and maintained by a competent person.
• Washing curtains and sheets are removed and post-washing cleaning is carried out.

Whip check installed at each
hose connection to catch a bro-

ken hose and prevent it from
whipping.

Figure 105: Wipe Checks at Each Hose Connection

Figure 106: High Pressure Washing Operation

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Asia Era One Co., Ltd. Page 107 of 120
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1
37 Attachment 4
1
No. Document Title 1
1 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR- 1
1
000001 1
Toolbox Talk Record 1
2 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000003
Manual Material Handling Assessment Form
3 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000005
Lifting Calculation Form
4 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000006
Job Safety Analysis Form
5 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000007
Confined Space Permit Form
6 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000008
Confined Space Entry Logbook
7 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000009
Hot Work Checklist
8 EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-FR-
000010
Scaffold Structures Checklist

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Asia Era One Co., Ltd. Page 108 of 120
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Attachment 1: Toolbox Talk Record

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 109 of 120
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10310, Thailand

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Attachment 2: Manual Handling Assessment Form

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Asia Era One Co., Ltd. Page 110 of 120
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Asia Era One Co., Ltd. Page 111 of 120
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10310, Thailand

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Asia Era One Co., Ltd. Page 112 of 120
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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ASIA ER

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-0

Asia Era One Co., Ltd.
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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RA ONE

000002-A

Page 113 of 120

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Attachment 3: Lifting Calculation Form

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 114 of 120
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10310, Thailand

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ASIA ER

Attachment 4: Job Safety Analysis (JSA) Form

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-0

Asia Era One Co., Ltd.
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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RA ONE

000002-A

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Attachment 5: Confined Space Permit Form

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 116 of 120
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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Attachment 6: Confined Space Entry Logbook

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 117 of 120
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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Attachment 7: Hot Work Checklist

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 118 of 120
18 True Tower, 29th Floor, Ratchadaphisek Road, Huai Khwang District, Bangkok,
10310, Thailand

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Attachment 8: Scaffold Structures Checklist

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Asia Era One Co., Ltd. Page 119 of 120
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10310, Thailand

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ASIA ERA ONE

For more information
about Occupational Safety,

Health and Environment,
please contact:

[email protected]

Document No: EHSR2-ARL-EHSR3AL-SEGENP00-W-HSE-MN-000002-A

Asia Era One Co., Ltd. Page 120 of 120
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10310, Thailand

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