Method Statements For General Concrete Work_Method Statements for Method Statements For General Concrete Work Works and to details out the steps to be taken in meeting the technical requirements of Van Phong 1 thermal power plant project
Comment Response Sheet (CRS) Project Title Van Phong BOT Thermal Power Plant Project Document Title Method statement for General concrete work Document Type For Approval Document No VP1-0-L4-C-GEN-10007 Returned Status AC Prepared by D.H JEONG CRS No VP1-0-L4-C-GEN-10007-B-CRS CRS Issued Date 19/03/2020 Engineer Construction Status O/C * Remarks No Section/ Page Owner’s Comment 08/01/2020 How to ensure that all Method statement has been reviewed by relevant person? For example: We did not know this method has been review by EHS team or not? Response to Comment 12/03/2020 Review Date 08/01/2020 Open 19/03/2020 Closed EHS team review all of MS by Lot4’s internal procedure 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 08/01/2020 Adding tolerance size for structure dimension after removing the form-work 12/03/2020 Lot4 updated & ITP will define criteria for test work clearly 08/01/2020 Open 19/03/2020 Closed 19/03/2020 (1) Noted 2 More statement regarding concrete crack control when crack/honeycomb happen and treatment 19/03/2020 (2) Crack control is essential content to add in the MS of concrete works before commencing work 3 12/03/2020 Lot4 will be submit by other document Open Open 08/01/2020 19/03/2020 (2)Open Closed Closed 02/06/2020 (2) Lot4 submitted MS for Concrete repair work separately Acceptance criteria of compressive strength sampling test to be mentioned 12/03/2020 19/03/2020 Lot4 updated on 6.9 in accordance with ACI 318 & Appendix G (3) Closed 08/01/2020 Please definite the general concreting works What is the difference of general and specific concrete? structure type, casting method or whatever? - Then a method statement for specific concrete will be submitted separately 08/01/2020 19/03/2020 12/03/2020 08/01/2020 Open DHI has been updated 19/03/2020 Closed 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 08/01/2020 1: Please clarify whether this MS applied for Mass concrete work or not? 19/03/2020 Closed 08/01/2020 2: Please clarify this MS will apply for offshore work or not? 19/03/2020 Closed 08/01/2020 3: What is the general structure? Please make it clear 12/03/2020 08/01/2020 Open This MS not applied for Mass concrete work 19/03/2020 Closed 12/03/2020 08/01/2020 Open This MS covers all of concreting work generally, except requirements for mass concrete 19/03/2020 Closed 12/03/2020 Lot4 has been updated in page 08/01/2020 Open 19/03/2020 Closed 19/03/2020 Closed 08/01/2020 Code and testing standard for each material should be stated clearly 12/03/2020 08/01/2020 Open Lot4 has been updated 19/03/2020 Closed 19/03/2020 Closed 08/01/2020 Part iii-2 Exhibit B1 Appendix G Civil/Structure Technical Guideline 12/03/2020 08/01/2020 Open Lot4 has been updated 19/03/2020 Closed 12/03/2020 08/01/2020 Open Organization chart is not necessary for MS 19/03/2020 Closed 3 19/03/2020 Closed 08/01/2020 Organization chart which show the responsibility of each person on QC control for both batching plant and site execution 19/03/2020 Closed Lot4 can share it separately when VPCL request Page of 10 Comment Response Sheet (CRS) 10 08/01/2020 This sequence for construction stage, how about manufacture stage? 12/03/2020 08/01/2020 Open Closed We don’t handle concrete manufacture stage in this MS 19/03/2020 Open 19/03/2020 Open Why is the ITP for general concrete works including manufacture stage? 02/06/2020 08/01/2020 Open 19/03/2020 Closed 08/01/2020 Open 19/03/2020 Closed 12/03/2020 08/01/2020 Open Lot4 has been updated 19/03/2020 Closed 12/03/2020 08/01/2020 Open Fly Ash be followed and comply with ASTM C618 Class F 19/03/2020 Closed 08/01/2020 Add rebar fabrication, formwork fabrication step 11 12 13 19/03/2020 Closed 08/01/2020 It is up to kind of structure, these steps might parallel 5 19/03/2020 Closed 08/01/2020 Method statement cover the concrete material manufacture, it is necessary to specify the critical specification of raw material: Cement, Coarse aggregate, Fine aggregate, w/c ratio 19/03/2020 Closed 08/01/2020 How about fly ash? 14 Lot4 updated sequence 12/03/2020 Lot4 has been updated 12/03/2020 Lot4 has been updated What is the specification of fly ash? 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 15 08/01/2020 12/03/2020 08/01/2020 Open 6.3.9: Dimension of chamfer shall follow the construction drawing Lot4 took the dimension (25mm) from Part III-2 Exhibit B1 Appendix G Civil/Structure Technical Guideline 19/03/2020 Closed 12/03/2020 08/01/2020 Open Strength of spacer block shall not be fewer than design strength of concrete 19/03/2020 Closed 12/03/2020 08/01/2020 Open Lot4 has been updated 19/03/2020 Closed 12/03/2020 08/01/2020 Open Lot4 has been updated 19/03/2020 Closed 19/03/2020 Closed 08/01/2020 6.4.2: requirements for spacer block is missing 16 19/03/2020 Closed 08/01/2020 6.6.2: Welding to re-bar case is not allow It is also lead to the movement of embedded during casting concrete 17 Independent support is recommended 19/03/2020 Closed 08/01/2020 18 There is no HSE team inspection before casting or pouring concrete, safety team need to check and confirm the safety condition before actual concreting for safety sake 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 19 08/01/2020 12/03/2020 08/01/2020 Open 6.9: How many method of concreting, which one which case, how technical requirement of each? This MS cover all of concreting work basically There will be separate MS with proper technical requirement for special cases 19/03/2020 Closed Closed 08/01/2020 12/03/2020 08/01/2020 Open adding Air content check Lot4 has been updated 19/03/2020 Closed Closed 08/01/2020 12/03/2020 08/01/2020 Open 6.9.1: height of falling max=1.5m Lot4 has been updated 19/03/2020 Closed 12/03/2020 08/01/2020 Open Pumped concrete shall be placed by pumping in accordance with recommendations contained in ACI Standard 304 2R Placing Concrete by Pumping Methods304.2R, Placing Concrete by Pumping Methods 19/03/2020 Closed 19/03/2020 20 10 19/03/2020 19/03/2020 21 11 Closed Max falling height should be mentioned 19/03/2020 Closed 08/01/2020 Concrete pump truck will not be used? 22 13 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 23 13 08/01/2020 12/03/2020 08/01/2020 Open Detail of how to fixing anchor bolt to be more detailed- Please check whether in case of anchor bolt is installed later or not Anchor bolt install MS including shop drawing of temporary anchor bolt frame will be submitted separately, if necessary 19/03/2020 Closed 12/03/2020 08/01/2020 Open Yes Construction joint will be mentioned on drawing or relevant document 19/03/2020 Closed 08/01/2020 12/03/2020 08/01/2020 Closed Open 6.9.2: It is depend on the mix design with workable characteristic after (x) hours (slump, temperature) admixture for controlling setting time Controlling setting time for concrete less than 2.5hours, test result show in mix design report, this document will be submitted when finish trial mix batching plant 19/03/2020 Open Please clarify again Lot4 will update status of mix design document 19/03/2020 02/06/2020 Open: hours is recommended based on initial setting time of cement is 150 minutes for safety sake 08/01/2020 Lot4 updated it 12/03/2020 08/01/2020 Open 6.9.4: Vibration? Lot4 has been updated 19/03/2020 Closed 19/03/2020 Noted that when anchor bolt be collided with reinforcement during rebar installation and noted that cutting rebar is not accepted 08/01/2020 Construction joint? 24 25 26 13 14 15 19/03/2020 Closed 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 27 16 08/01/2020 12/03/2020 08/01/2020 Open 6.10.2: Part III-2 Exhibit B1 Appendix G indicates 10 days Lot4 followed Part III-2 Exhibit B1 Appendix G 313.4 19/03/2020 Closed 12/03/2020 - Wall, Column, sides of Beams: 12h - Pan joist forms, Slabs under 3m clear span between structural supports: days - Slabs, range 3-6m clear span between structural supports: days - Slabs, over 6m clear span between structural supports: days, 08/01/2020 Open 19/03/2020 Open 19/03/2020 Noted 08/01/2020 6.11.4: Not clear, please explain more detail for side form, bottom form, time to remove support also 28 17 19/03/2020 Open: for bottom formwork of beam and slab, supplement the required concrete strength before remove formwork 08/01/2020 29 17 6.12.2L Chemical method is recommended, otherwise cannot roughen concrete surface after 12 hours 02/06/2020 Lot4 revised in accordance with ACI-347Guide to formwork for concrete - Wall, Column, sides of Beams: 12h - Pan joist forms, Slabs under 3m clear span between structural supports: days - Slabs, range 3-6m clear span between structural supports: days - Slabs, over 6m clear span between structural supports: 14 days, 12/03/2020 In the case of more than 12 hours, use a handheld device to chipping OPEN, - Design engineer have to specify the minimum strength of concrete to be attained before removal of formwork - If above action is lacked, and stripping time is also not determined; consider the design strength of concrete is at 28 days age, recommend to apply 24h/7days/14days/21days ordinarily reference to ACI-347 08/01/2020 Open 19/03/2020 Closed 19/03/2020 Closed Page of 10 Comment Response Sheet (CRS) 08/01/2020 30 20 6.19: Please clarify how hot temperature shall be applied this method? 12/03/2020 Lot4 revised in accordance with ACI-305RGuide to hot weather concreting 08/01/2020 Open 19/03/2020 Closed 12/03/2020 08/01/2020 Open Closed 1,2,3,4 Lot4 has been updated 19/03/2020 Open 02/06/2020 Lot4 corrected 19/03/2020 Closed Open 02/06/2020 Lot4 updated 19/03/2020 Closed Open 02/06/2020 19/03/2020 Closed Open 19/03/2020 Closed 08/01/2020 This is not in compliance with Doosan's HSE risk management procedure Please clarify the risk assessment as job safety analysis, when the both documents shall be prepared 31 22 Please the intensive study on Doosan's procedure for proper document It seem that there is no review from Doosan's safety team on this document 19/03/2020 Open, Please refer to detail comment at the risk assessment table 31 19/03/2020 and what? 19/03/2020 32 11 02/06/2020 Lot4 Updated JSA as following comments it should be ACI 304 as Tech Spec 19/03/2020 33 31 Lot4 Updated JSA as following comments Why there is no JSA for this task? Page of 10 Comment Response Sheet (CRS) 19/03/2020 34 38 02/06/2020 Lot4 Updated JSA as following comments 19/03/2020 Closed Open 19/03/2020 Closed Open Why there is no JSA for this task? 19/03/2020 35 39 02/06/2020 Lot4 Updated JSA as following comments Why there is no JSA for this task? Additional Notes (if any) * O - Open, C – Closed Page 10 of 10 VAN PHONG BOT THERMAL POWER PLANT PROJECT [ Safety ] - Slips, trips and falls - Falling of materials and objects - Concrete affect to exposed skin / eyes [ Safety ] - Fatality - Personal injury - First aid injuries Manual supporting 12 Site personnel, Subcontrac tors & Others [ Safety ] - Clear stock material unobstructed walkways - Work with proper platform Not monkey-climbing - Effective material storage in segregated areas - Regular monitoring of work areas - Unwanted materials remove from site immediately - Housekeeping and stock material tidily - Manual lifting with straight and vertical posture No bent down to lift and bring - Full PPE with safety boots and gloves in needed for handling - Construction waste, domestic waste must be collected and stored properly Do not throw around the worksite - Applied buddy work systems Do not work alone - Concentrate and not lost focus on work DO not running, joking during installing activities - Vibrating power tools safety work (See Use of power tool and Use of vibrating tools.) - Provides proper light for night work - Supervision and instruct worker not work under concrete's pouring splash range [ Environment, Social & Health ] - Generation of diseases - Contamination of land - Health / food poisonous [ ES&H ] - Effect on people health - Land contamination - Water pollution - Social conflicts in shape of community complaints [ Environment, Social & Health ] - Effective waste management (waste bins provided around site and skips segregated, with waste disposed of by an approved licensed contractor) - Monitoring of waste collection contractor and ensuring the dumping in licensed area - Do not eating / drink without washing hand/ face during concrete activities [ Safety ] - Slips, trips and falls - Falling of materials and objects - Fire [ Safety ] - Fatality - Personal injury - First aid injuries [ Safety ] - Clear unobstructed walkways - Clear and safe access and egress - Effective material storage in segregated areas - Regular monitoring of work areas - Unwanted materials remove from site immediately 2 Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation Significant Safety Hazards Housekeepin g - 45 - | P a g e Site personnel, Subcontrac tors & Others 12 2 Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation VAN PHONG BOT THERMAL POWER PLANT PROJECT i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation Poor ground conditions Site personnel, Subcontrac tors & Others [ Environment, Social & Health ] - Generation of diseases - Contamination of land [ ES&H ] - Effect on people health - Land contamination - Water pollution - Social conflicts in shape of community complaints [ Environment, Social & Health ] - Effective waste management (waste bins provided around site and skips segregated, with waste disposed of by an approved licensed contractor) - Monitoring of waste collection contractor and ensuring the dumping in licensed area [ Safety ] - Slips, trips and falls - Collision with vehicles [ Safety ] - Serious personal injury - First aid injuries [ Safety ] - Access routes well maintained on a level surface, free from slip or trip hazards and adequate lighting provided - Signage and barriers installed to guide pedestrians along walkways safely [ Environment, Social & Health ] - Sediment & erosion [ ES&H ] - Blocking of storm water channel - Blocking of water discharge points [ Environment, Social & Health ] - Well compaction of ground - Regular water spray to maintain the temporary site roads [ Safety ] - Contact with hazardous materials entering the body through o Ingestion o Absorption o Inhalation [ Safety ] - Serious personal injury - First aid injuries - Medical cases [ Safety ] - Suitable sufficient welfare faculties - Health and medical surveillance - First aid facilities - Correct PPE to be worn at all times 3 2 Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation Health Hazards Contaminatio n of land/building s - 46 - | P a g e Site personnel, Subcontrac tors & Others 3 2 VAN PHONG BOT THERMAL POWER PLANT PROJECT Use of hazardous materials - 47 - | P a g e Site personnel, Subcontrac tors & Others [ Environment, Social & Health ] - Damage to environment [ ES&H ] - Effect on people health due to contamination - Effect on environment - Social conflicts [ Environment, Social & Health ] - Emergency spill response established - Contaminated areas segregated and warning signage installed - Any contamination of soil will be removed as hazardous waste from the site [ Safety ] - Contact with hazardous materials entering the body through o Ingestion o Absorption o Inhalation - Acute and chronic effects [ Safety ] - Serious personnel injury or fatality [ Safety ] - Materials to be stored in a lockable container marked as ‘hazardous materials’ - Only competent people to have authorization to materials - Correct PPE to be worn at all times - MSDS control measures and guidance to be followed - COSHH register and issue sheets to be recorded and maintained - Health and medical surveillance to be undertaken - Never use drinking water bottle as secondary containment for chemicals - Must provide proper secondary containment dedicated for chemicals [ Environment, Social & Health ] - Generation of fumes - Accidental release [ ES&H ] - Irritant; Dermatitis and Bronchitis - Corrosive; Burning of living tissue - Toxic; Damage to kidneys, liver and heart - Carcinogenic; Promotion of abnormal body cells becoming cancers - Mutagenic; Damage to genetic material passed on for future generations - Air pollution - Soil contamination - Water pollution 15 [ Environment, Social & Health ] - Use and storage shall be according to the instructions of manufacturer as mentioned in MSDS Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation VAN PHONG BOT THERMAL POWER PLANT PROJECT [ Safety ] - Contact with vibration tools and equipment for long periods of time Use of vibration tools Manual Handling - 48 - | P a g e [ Safety ] - Serious personal injury Site personnel & Subcontrac tors Site personnel & Subcontrac tors [ Environment, Social & Health ] - Acute effects on the body - Back pain - Numbness in fingers and arms - Increased heat rate and blood pressure - Chronic effects on the body - Permanent spinal damage - Damage to the central nervous system - Hearing loss - Circulatory and digestive problems [ Safety ] - Lifting a load that is too heavy - Poor lifting technique - Dropping of a load - Lifting sharp edged or hot loads - Excessive carrying distances, pushing or pulling and sudden movements - Limited breaks, individual capabilities 16 [ Safety ] - Eliminate or substitute where possible through alternative methods of work i.e mechanical methods/chemical use - If unavoidable low vibration equipment shall be used and regularly maintained - PPE shall be worn by all personnel including anti vibration gloves where possible - Interval work rotation to be considered during long exposure of vibration works [ ES&H ] - Hand-arm vibration syndrome - Vibration white finger - Whole body vibration [ Environment, Social & Health ] - Max usage time/shift for specific equipment shall be determined and not exceeded - Rotation schedules of the workforce shall be formulated to limit individual exposure [ Safety ] - Personal injuries in the form of o Back injuries o Hand injuries o Foot injuries o Hernia o Muscular sprains and strains [ Safety ] - Manual handling assessments (task, individual, load and work environment) - Use of mechanical assistance; fork lifts, hoists and cranes - Task improvement; layout/sequencing of the operation, removing obstructions, job rotation - Manual handling training for all operatives - Access/egress routes are clear of any slips, trips and fall hazards - Handles and grips installed where possible - Adequate lighting provided - PPE shall be worn by all operatives 12 2 Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation VAN PHONG BOT THERMAL POWER PLANT PROJECT Noise Site Personnel, Subcontrac tors & Others [ Environment, Social & Health ] - Bad lifting posture [ ES&H ] - Chronic effects; illnesses such as arthritic and spinal disorders [ Environment, Social & Health ] - Increasing the awareness of workers through training [ Safety ] - Operation of noisy machines and equipment - Work indoors or in confined spaces - Machine panels and covers missing - Engines left running when machines not in use - Missing silencers and mufflers [ Safety ] - Ear damage on a acute and chronic basis - Acute effects; slight deafness, tinnitus, acute acoustic trauma - Chronic effects; noise induced hearing loss (reducing ability to hear speech), permanent deafness, severe tinnitus [ ES&H ] - Effect on nearby community - Social conflicts [ Safety ] - Periodic inspections and monitoring of noise levels on site - Plant to be fitted with noise reducing methods - Relocate any noisy process far away from workshops and people as possible - If noise level is between 80 - 85 dB average daily exposure, personnel at risk should be informed and hearing protection zones implemented and segregated via barriers included with warning signage - PPE to be worn by all operatives [ Environment, Social & Health ] - Generation of noise Heat Stress - 49 - | P a g e Site personnel, Subcontrac tors & Others [ Safety ] - Overexposure or overexertion in excessive working environmental conditions - Work performed at elevated temperatures and high relative humidity - Wearing of clothing that inhibits the body’s ability to cool itself [ Safety ] - Heat Stroke; Confusion, irrational behavior, convulsions, coma and death - Heat Exhaustion; Headache, vomiting, dizziness, weak pulse - Heat Rash; Build up of rash covering parts of the body - Heat Cramps; Muscle spasms i.e abdomen and extremities 12 2 Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation Control measures will be regularly reviewed and monitored to assess their suitability and improvements made if required If any change is made to the working condition or operation i.e change in sequencing, new plant/equipment or new workers involved, a new risk assessment will be conducted and further control measures implemented to suit the operation [ Environment, Social & Health ] - Inform to community representative for any high noise activity - High noise activity shall planned to execute during the day time instead of night time [ Safety ] - Local regulations to be followed on site for working hours - First aid facilities will be equipped and prepared for any emergency - Regular drills conducted - Training of all operatives regarding heat stress management shall be given 12 VAN PHONG BOT THERMAL POWER PLANT PROJECT [ Environment, Social & Health ] - Poor welfare facilities - Poor medical facilities - Inadequate knowledge Pre By: Doosan Heavy Industries & Constructions / EHS Dept Pos: EHS General Manager [ ES&H ] - Unrest in workers - Social conflicts [ Environment, Social & Health ] - Suitable and sufficient welfare facilities on site, include shelter from sun, drinking facilities (clean and suitable drinking water, monitored and refilled throughout the day), hand wash and toilet - Ambulance shall remain on standby - Regular health surveillance and medical surveillance undertaken on workforce - Increase in awareness of workers Signature: App By : Date: Pos : Doosan Heavy Industries & Constructions / Site Management Site Manager Frequency Severity Risk Factor Number (RFN) Residual Risk Number (RRN) 1: 1: - Trivial/Acceptable 1-2: 2: Unlikely/Improbable Remote Negligible Trivial/Acceptable 2: Slight - Tolerable 3-5: Tolerable 3: Quite Possible/Occasional 3: Moderate - Moderate/Acceptable with review 6-9: Moderate/Acceptable with Review 4: Likely/Probable 4: Critical/High 10 -15 Substantial 10-15: Substantial 5: Very Likely/Frequent 5: Catastrophic/Very High 16 - 25 Intolerable/Unacceptable 16-25: Intolerable/Unacceptable - 50 - | P a g e Signature : Date: * Prepare Job Safety Analysis when RRN is > L1 - Likelihood as is L2 - Likelihood with mitigating controls in place S1 - Severity as is S2 - Severity with mitigating controls in place VAN PHONG BOT THERMAL POWER PLANT PROJECT Job Safety Analysis List of all job steps Equipment/Tools and Material Preparation Job description Hazardous - Fabrication of form work, rebar - Injury by using hand tools and both manual and power driven - Be operated only by workers who have been authorized and given appropriate training - Set up Power / Electric Board, Panel - Electric shock due to without ground external - Safe operating procedure should be established and used for all tools and equipment box and circuit breakers Precautionary measures - Generator (diesel) equipment oil leakage during operation - Daily check list of equipment must be provided prior to start any work - Oil/chemical storage leakage - Every power driven tools should be provided with adequate means, immediately accessible and readily identifiable by operator, of stopping it quickly and preventing it from being st arted again inadvertently C - Every hand tools must be inspected every month and attache d inspection tag - Provide adequate ground and circuit breakers - Must use core codes electric wire and separate distribution panel (must pass arrangement of ELCB) and avoid any water affect - All kind of electric cable must be hang over ground - Must use industrial socket and plug - Electric cabinet don't affect any water - Daily check of the equipment prior to start of work - Regular check &monitoring of the equipment prior to use - Provide secondary containment protection under the equipment to prevent contamination of soil by oil spillage - Diesel/chemical shall be stored in secondary containment & MSDS requirement shall be communicated with all concerned - 51 - | P a g e VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Installation Site Temporary Energies Job description - Fabrication of form work, rebar - Set up Power / Electric Board, Panel Hazardous - Electric shock/burns - Ignition of flammable gases and combustible materials - Faulty cables, extension leads, plugs and sockets - Damaged casings - Incorrect fuses - Poor maintenance - Fire C Precautionary measures - Permit to Work - RCD or ELCB rated at 30mA (milliamp) to be installed and tested before use - Distribution board must remain locked at all times - Maintenance undertaken by competent person - Firefighting equipment - Segregation of working area - PPE shall be worn at all times - Only qualified and certified (3rd Party) electrician allowed to terminate panel boards - All distribution panel boards have warning signs, checklist and contact person attached on the front door - Cables must be over the ground or installed underground and not obstruct the movement/ transportation activities - Implementation of Lock out Tag Out system - Restrict the unauthorized access to the electrical networks - All distribution panel boards are locked and only authorized person can open the panel boards - All distribution panel boards have warning signs, checklist and contact person attached on the front door Form & Rebar installation - 52 - | P a g e - Installation of reinforcement - Sharp steel stabbed into people - follow work process - Accident caused by steel cutting and bending machine - Use safety glove while working - Installation formwork - Formwork hit people while use crane to lift and install formwork - Check the status of crane - Welding to fix formwork - Electric shook, burned, fire, explode, Sore eyes, inhale harmful gas - Check the earthling of equipment, prepare all safety tool as solder mask, safety glove - Carefully while working - Worker only touch to formwork when crane lower formwork to safety elevation VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Concreting Job description Hazardous Transportation and Delivery of Concrete Stricture of nearby workers or falling by carriers as a result of not implementing measure to prohibit workers from approaching - Set measures to prohibit workers from entering the site and control nearby workers by dispatching a guidance Overturning of pump car due to not placing the bottom out-rigger of concrete pump car on firm ground Check equipment operation and certification of pump car and truck operators Overturn pump car and collision with ready mix concrete truck due to uncertified operators Precautionary measures - Set using support for out-rigger after checking ground condition Set protective pipes around pump car boom and keep distance by dispatching guidance Electric shock due to contact with high voltage wire on pump car boom Placing and Compacting Concrete - Accident and skin irritation due to not wearing safety helmets, gloves and safety shoes - Wear PPE like safety helmets, gloves and safety shoes - Breaking due to inferior connection of concrete hose and pipes Set cover on openings and safety rail on slab edge - Falling due to without safety measures on ready mix concrete placing nearby openings or slab edge - Electric shock due to without ground and circuit breakers on vibrators - Collapse due to problems in formworks, form staging or intensive placing whilst placing concrete Tightly set connections of concrete hose and pipe Ground vibrator, connect circuit breaker and use motor driven vibrator rather than electric driven Placing based on plan and order Check for all the process by Supervisor Removal of any protruding nails on the formwork Injured due to stepping-on protruding nails on the formwork Use of vibration tools - Contact with vibration tools and equipment for long periods of time - Hand-arm vibration syndrome - Vibration white finger - Whole body vibration - 53 - | P a g e - Eliminate or substitute where possible through alternative methods of work i.e mechanical methods/chemical use - If unavoidable low vibration equipment shall be used and regularly maintained - PPE shall be worn by all personnel including anti vibration gloves where possible - Interval work rotation to be considered during long exposure of vibration works VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Job description Hazardous Precautionary measures Max usage time/shift for specific equipment shall be determined and not exceeded - Rotation schedules of the workforce shall be formulated to limit individual exposure Night Work Curing of Concrete - Falling without setting safety rail on opening around curing concrete and safety rail on slab - Set safety rail on slab edge and cover on openings - Installation form work, rebar, pouring concrete - People fall down water Install warning danger area - Pump car hit people - Make the job carefully - Hand scratch - Install warning danger area, worker don’t stand under loading of crane - Divers are drowned, cramped - Control the loading capacity of crane - Use safety glove - Fully equip of labor protection, always supervising while working Work at height - Installation form work, rebar, pouring concrete - Falling objects and materials- Premature collapse - Dust emissions into air - Generation of noise - Uncontrolled access - Provision of properly constructed working platforms complete with toe boards and guardrails erected, inspected and approved by competent persons only - Collective fall protection (guard rails/nets/bags), where possible, erected and inspected by competent persons - Where the above is not practical individual fall protection (harnesses/lanyards/inertia reels) shall be used - Practice 100% tie-off when working at height- Installation of canopy specially on the access way- No heavily material stockpile allowance on the walk ways - Control of noise through strict inspection of all equipment before entering to site and provision of acoustic barriers where noise exceeds the allowable limits - Establishing fence and security system to restrict the - 54 - | P a g e VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Job description Hazardous Precautionary measures unauthorized entry to work site - Do not remove any part of the scaffolding structure/ protection structures without permission from competent person - Proper platform and access with handrail protection must be setting to entry the internal of closely steel structures Work at height Refection, dismantling and use of temporary works/support systems at height scaffolds, slip form - Falls (people) - Falling objects and materials - All working at height equipment shall be constructed, maintained and dismantled by competent people - Premature collapse - Exclusion zones set up during erection, dismantling and use - Scaffolding tagging system - All support systems to be included in a temporary worksregister – Documentation in the form of inspections, registers, certification and technical data to be kept on file- Barricade in place with signage during erection / dismantling of scaffold platforms - No throwing of scaffold materials during dismantlingInstallation of planks on the scaffold ladder with barricade on scaffold platforms that are Red Tag C Work at height - 55 - | P a g e Use of Crane Hoisted Workboxes/Man Basket ( If required ) for Concrete repair - Falls (people) - Falling objects and materials - Premature collapse - Permit to Work - Crane hoisted workboxes / man basket shall only be used where there is no other practicable alternative means to safely carry out the work - Suitable & sufficient training shall be given to crane operatives - PPE shall be worn at all times - Access and egress from workbox/man basket shall be prohibited while in motion - Only competent certified persons shall be authorized to work in the workbox/man basket at all times when elevated - Radio communication shall be used - No person shall be in the personnel cage while the crane is VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps 7.Lifting Operations Job description - Installation form work, rebar, pouring concrete Hazardous Precautionary measures moving - Man basket or material basket must be certified by 3rd Party - 5th line (sling belt) must be used where worker will hook when inside man basket - Safe work load capacity must be indicated on the man basket and material basket - Regular inspection on equipment built in ladder access - Falling objects and materials - Permit to Work - Crushing - Segregation of working area while lifting in progress - Collisions between people and plant - Only competent authorized persons with the relevant certificates and license, to operate machinery and conduct lifting operations - All lifting operations to have a banks man at all times - Warning signage displayed notifying of lifting operations - Full implementation 333 for Safety for lifting operation: 1) meters barricade 2) 30 cm height trial lifting 3) 30 Seconds Holding time - Use of green lifting card by all rigger prior start of any normal lifting operation -No person shall be on the load during lifting operation 8.Heat Stress - Installation form work, rebar, pouring concrete - Overexposure or overexertion in excessive working environmental conditions - Work performed at elevated temperatures and high relative humidity - Wearing of clothing that inhibits the body’s ability to cool itself - Local regulations to be followed on site for working hours - First aid facilities will be equipped and prepared for any emergency - Regular drills conducted - Training of all operatives regarding heat stress management shall be given Work in Confine Space - Installation form work, rebar, pouring concrete - Asphyxiassions- Entraiment- Explosion- Poor illumination - Permit to Work- Only competent persons authorized to workSupervision of work by competent person - Fatality - Safe access and egress- Atmospheric monitoring used to monitor - 56 - | P a g e VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Job description Hazardous - Serious injury - Social conflict Precautionary measures environment - Applied of suitable and sufficient emergency Correct PPE worn method- - Confined space signage’s, warning and contact numbers posted on the access / egress of confined space - Proper lighting illumination on work areas (if needed) - Forced mechanical ventilation on confined space (if needed) - Any kind of cylinder not allowed inside a confined space - Watchman and Register Pad be provided to at entrance to completely ensure labors / worker in-out be fully monitoring 10 Use of Power Tools - Installation form work, rebar, pouring concrete - Falls - Electric shock - Cut - Fire - Electrical equipment register containing all electrical equipment on site as well as relevant documentation - Temporary power supply, portable electrical tools, cables will be tested and inspected every three months by competent persons, and tagged to certifying it is safe for use - All defective items reported immediately, if defect renders equipment unsafe to use it will be removed from site until repaired - Double insulated cables to be used on hand held tools - All cable routes shall be designated so that to not obstructed access/egress walkways - PPE must be worn at all times - Use of industrial plug 44 for all power tools at site 11 Hot Works - Installation formwork - Fire - Explosion - Permit to Work - Fire provisions in presence of all hot works - Complete PPE must be worn by all operatives - Area to be segregated - Hot works to cease before the end of the working day and work inspected prior to completion - All work areas kept clear of debris and rubbish - 57 - | P a g e VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Job description 12 Use of MEWP's ( If required ) - Installation form work, rebar, pouring concrete Hazardous Falling objects and materials- Premature collapse Precautionary measures - Fire watchman must be designated during hot work operation - Mandatory prior start of hot work must comply with three requirements: Fire extinguisher available, fire blanket to be use and certified fire watchman in place - Only operated by trained and competent persons - Shall not be moved while in the elevated position or when a person is on the platform - Shall only be operated on level and stable ground with consi deration given for the stability and loading of floors - Guard rails, toe boards and internal ladder should be fittedAll tools must be tied-off - Worker inside MEWP must be tied off 100% all the time 13 Mixing and Application of C Epoxy Resin Repairing defect of concrete - Accident and skin irritation due to not wearing safety helmets, gloves and safety shoes - Falling due to without safety measures on filling and application of Epoxy Resin - Epoxy Resin splashes into the eyes and skin - Wear always PPE like Safety Helmet, gloves and safety shoes - Placing based on plan and order Check for all the process by supervisor - Always wear safety PPE at all times 14 Clean working area - Clean working area - To slip foot, mud, soil hip people - Fully equip of labor protection, cove the working area - Transport soil to out site - Truck hit people - Must have the signalman - Spill oil or fuel - Equipment broken - Check and repair all fuel pipe, if can't repair, it must be change - Use funnel in supplies fuel - Must have persons for supplies or extract fuel - Below fuel can, use tray to collect fuel - When supplies fuel to equipment, keep a gap 10~15cm inside can to avoid spill - Use plastic bag to cover fuel can - In repair period, spread PVC sheet and tray to collect fuel - Marking fuel can by paint - Careless when supplies fuel - Don't have method to anti-spill when repair equipment - Fuel can having holes - Spill fuel when transposition (fall down fuel can, transport - 58 - | P a g e VAN PHONG BOT THERMAL POWER PLANT PROJECT List of all job steps Job description - Other hazardous (weather…) - 59 - | P a g e Hazardous equipment have accident) Precautionary measures - All disposal fuel must put in correct location - Thunder strike, heavy rain - Stop the job if the weather change