Method Statement for Installation of Louvers, Grilles, and Diffusers for HVAC Ducting System

method statement for installation of louvers, grilles, and diffusers for HVAC

I. Purpose

The method statement for installation of louvers, grilles, and diffusers for HVAC ducting system sets the guidelines and methodology to be followed while performing construction complying with project specifications and in safety manners.

II. Scope

The step covers the detailed procedure for the installation of louvers, grilles, and diffusers for HVAC ducting system that includes the technical requirement set forth for the installation methodology.

This procedure defines the method used to ensure the installation has been carried out as per approved shop drawings, plans, details, and sections in line with the project specification.

III. References

Manufacturer’s Installation Details (to be provided along with the Material Submittal)
Approved Material Submittal

IV. Abbreviation

PM – Project Manager
PE – Project Engineer
QC – Quality Control
ITP – Inspection & Test Plan
MST – Method Statement
PPE – Personal Protective Equipment
MSDS – Material safety data sheets
RSK – Risk Assessment
QCP – Quality Control Procedure
PQP – Project Quality Plan
INR – Inspection Request
QA/QC – Quality Assurance/Quality Control
HSE – Health, Safety & Environment
HVAC – Heating, Ventilation, & Air Conditioning

V. Responsibilities

A. General

  1. The Project Manager will be responsible to manage, execute complete and handover the MEP construction activities within approved budgets and resources in compliance with project requirements as specified in project specifications. He will be overall in charge of implementing method statements in accordance with QA/QC and HSE requirements.
  2. The Construction Manager will be responsible for managing MEP construction activities and will lead and communicate with the site supervisor, subcontractors, and vendors to assist them in working to the project schedule by conforming QA/QC and HSE requirements at the site.
  3. The HSE Manager will be responsible for plan, coordinating and implementing issues and directives within the organization. He ensures safe environmental working conditions for all MEP employees.
  4. The QA/QC Manager will be responsible for supporting the project MEP team in implementing and maintaining Quality Management System for the project through PQP, ITP, MST, and Procedures in compliance with Project specifications, Codes, and Standards.
  5. The HSE Officer will ensure the enforcement of safety procedures in accordance with the approved HSE Plan. Will be closely monitoring the site engineer’s strict implementation of the method statement for the installation of louvers, grilles, and diffusers for the HVAC ducting system and Risk Assessment, the use of proper tools and equipment to maintain safety, certifications of equipment and their adherence to safety regulations, reporting of any unsafe work or stopping work that does not comply with HSE procedures.
  6. The Site Engineer will be responsible for carrying out all construction-related activities as per contract specifications, drawings/documents, codes, and standards and In-line with HSE and QA/QC requirements.
  7. The QA/QC Engineer will be responsible for conducting inspections as per PQP.
  8. The Supervisor/Foreman will be responsible for coordinating all works and workers related to the job.
  9. The Electrician / other tradesmen will be responsible for assisting his superiors during all construction work-related activities. And work shall be in-line with HSE and QA/QC requirements.
  10. The Store-In-charge receives and inspects all Incoming materials and reconciles them with documents; processes and distributes documentation; reports, documents, and tracks damages and discrepancies.
  11. The Safety Officer will be clearly visible, vigilant, and respond quickly and correctly during the crisis, observing and reporting, checking and monitoring, maintaining order among workers, and offering safety warnings and tips.

B. Interfacing with other Operations

Other Mechanical, Electrical, Architectural, and Civil requirements

C. Duration, Phasing with the Subcontractors

All works associated with Construction work referred to in this Method Statement shall be completed as per the project schedule

D. List of Subcontractors

Subcontractors for MEP: xxxxxx

E. Handling, Storage, and Transportation

  1. All documents must be available with the supplied louvers, grilles & diffusers i.e. shipping documents, packing lists, delivery notes, catalogs, installation and operation manuals, test certificates, etc.
  2. Each shipment must be blocked and securely fastened to avoid damage during transportation.
  3. All documents such as delivery notes, certificates and etc. shall be presented to the personnel in charge of main storage for verification, prior to entering the delivered materials in the site store.
  4. The louvers, grilles & diffusers, and accessories will be protected for shipping as per the manufacturer’s recommendation.
  5. The louvers, grilles & diffusers are supplied from the factory in proper packing in which they should remain until they have been installed.
  6. Unloading at the site must be controlled by the site team following the manufacturer’s instructions.
  7. The lifting equipment rating must under no circumstances be exceeded.
  8. All lifting equipment must be rated for the purpose and checked for damage before any attempts are made to lift the materials.
  9. The contractor will ensure that the material is stored in a shaded area to protect it from exposure to
    direct sunlight.
  10. The storage area shall be cleaned and at an appropriate height from the ground level. Separate areas in the storage zone must be marked for different materials.
  11. Each rack/pallet shall have an identification posted on laminated paper with the description of the items clearly written on it.
  12. There shall be appropriate spaces between the pallets so that the engineers/inspector can freely go around them and inspect the materials thoroughly.
  13. Staking the materials all over each other & in one corner is strictly not allowed.

F. Material Inspection

  1. The material will be delivered at the site in undamaged condition, in the manufacturer’s original container or packaging, with identifying labels intact and legible.
  2. Delivery of louvers, grilles & diffusers will be checked /inspected by QA/QC Engineer to ensure all items on the delivery note are correct prior to signing. Any shortage or damaged items should be recorded on the delivery note and damaged materials will store separately with an identification tag or shall be removed from the site.
  3. Each material item shall be allotted a distinct and separate reference number and mentioned on the material requisition. Make sure that material is approved/examined by the consultant and QA/QC and associated documents/test certificates are approved.
  4. The QA/QC Engineer/Store in charge shall ensure that all approved supplies be delivered to the site as per the approved material submittal; with the manufacturer’s seals, labels, or other proof of origin intact. These labels and seals shall not be removed until the material is required for use and shall be retained for inspection by the QA/QC Inspector and the consultant.
  5. Materials, which do not conform to the given specification/approved material submittal, shall be rejected. Any discrepancy or damages will be notified and reported for further action.
  6. Upon delivery of materials at site stores, inspection will be offered by QA/QC Engineer for the consultant’s approval.
  7. The QAQC Engineer shall initiate material inspection for all incoming material to QAQC and the material shall be inspected against reference documents and as per approved material submittal. Moreover, the physical condition of the material shall be checked. Afterward, an INR shall be raised by QA/QC Engineer to the consultant and an inspection will be carried out by the consultant.

VI. Resources

A. Tools and Equipment

The job will be carried out by manual means. The following are the types of Tools identified for work:

Hack saw/ Tin Snips
Electric drill with bits and Grinder
Open and box type wrench /spanners set
Chalk line/ marking pen
Measuring Tape/ Level bar
Battery Drill Machine
Screw Driver set / Pop Riveter
Paint Brush/ Cloth for cleaning
Step Ladders/ Movable Scaffolding


All testing equipment and measuring tools to be used shall have valid calibration certificates
prior to usage.

Equipment and machines shall be 3rd party verified with valid certificates.

Operator’s competency certificates shall be checked and maintained as quality and HSE records.
The contractor’s HSE inspection for all light and heavy equipment prior to site acceptance shall be
carried out.

HSE Inspection sticker shall be posted on the windshield to indicate that the equipment passed

B. Materials

Material includes but is not limited to the following:

a. Louvers, gilles & diffusers
b. The material shall be used after being approved by approved material submittals.
c. All material to be used shall conform to the project specification and authorities’ regulations
(where required).

C. List of Manpower

Construction Manager
Site Engineer
QA/QC Engineer
HSE Officer
Trailer Driver
Mobile Crane/Crane Operator
Forklift Operator

VII. Mobilization:

A. Preparing and Planning

Precautions, manpower, and equipment are available before the commencement of work.

The site team shall make sure that access roads are always clear of any obstructions and site is always accessible.

B. Site Clearance

Before commencing the work, the area shall be cleared of all debris, materials, or other obstructions.

C. Traffic Management

The site team with the assistance of the safety officers shall coordinate logistics and materials movement through the site following the direction and road signs displayed on site.

The required diversion routes shall be marked on drawings including the required traffic signs.

The Work Permits and Operator Certificates shall be compiled and filed for reference by ·authorized personnel.

Temporary traffic signs, barriers, and flagmen will be deployed to control traffic flow in accordance with and traffic management of the HSE Plan.

At the end of each ramp, there will be a transition area to give the driver the opportunity to watch the access roads before joining thereto.

D. Pre-construction Safety Meetings

The meeting shall be scheduled prior to the beginning of the work and before any subcontractor starts on the project.

Safety awareness meetings will be conducted every working day morning/every other day to brief the workforce on the safety prevention measures. The equipment check for safety shall be recorded/ documented during the daily Safety Awareness Meeting.

Traffic safety will be discussed to emphasize these meetings. Each worker will be instructed to follow specific safety requirements related to his trade. They will be required to follow installed safety signs, observe barricades and use PPEs.

The safety team will perform a hazard risk analysis by identifying all steps, and hazards identified in those steps, with a focus on the relationship between the work task, the tools, and the work environment. After identifying uncontrolled hazards; the contractor will take steps to eliminate or reduce them to an acceptable risk level.

General Contractual Safety, Health, and Environmental requirements.

Roles of the contractor, subcontractors, authority representatives, and all project workers.

Accident reporting requirements.

Specific details of the work to be performed along with the use of personal protective equipment.

Emergency procedure

E. Operating Procedures

A site investigation has to be carried out to develop safety precautions and measures prior to
the commencement of the work. After such investigation, relevant sign boards will be displayed and
barricades will be installed where and as necessary, such as but not limited to the following:

Relevant information, advanced signs, warning, and mandatory signs will be placed as required.

A radio communication system would be used where normal communication is impossible.

After completion of the work, safety cones and barricades have to be removed accordingly.

VIII. Methodology

A. Pre-Installation/General Requirement to consider

A meeting shall be scheduled prior to the beginning of the work.

Prior to the commencement of any construction works, the area and access will be inspected to
confirm that they are in a suitable condition for construction work to commence. The site
representative is to prepare a working permit (if any) and submit it to any designated safety officer.

All relevant documentation (approved shop drawing, coordination drawing, approved method statement, Approved material submittal, approved ITP, the checklist) and material applicable to a particular section of work will be checked before the commencement of work.

The mechanical site engineer will instruct his/her supervisor to be in charge who in return will relay to the tradesmen regarding the execution of the work and will distribute all necessarily approved construction shop drawings and coordinated layout plans.

The mechanical site engineer/supervisor should also check the tools and equipment available which should be compliant with the contract requirement and are in good and safe working condition.

The contractor will ensure that only approved materials required to carry out the work shall be available.

The site engineer, supervisor, and foreman should verify that the personnel or assigned person must have sufficient knowledge of the procedure for the installation and necessary fundamental information.

The contractor will ensure that all the provisions, distances, openings, height levels, and alignment works required are properly coordinated with architectural, civil, and electrical services which shall be checked by Site Mechanical Engineer, Supervisor, and Foreman.

All safety regulations must be observed at the installation site.

Ensure ceiling/wall clearance (if any) is issued by the architectural/civil team prior to the start of work.

B. Installation Procedure of Louvers, Grilles & Diffusers

All types of louvers, grilles, and diffusers shall be installed by the contractor as per approved material submittal, manufacturer/supplier instruction, shop drawings, and project specification requirements

Layout the installation that is marked in the ceilings released by the civil and architectural team, and check and verify the location of air outlets and inlets conform to architectural design, features, symmetries, and electrical lighting arrangement.

If there is a difference or inappropriate within the design features, make the necessary adjustment as per confirmation from architectural design and other services provisions.

Installed approved supports, brackets, hangers, and anchor fasteners as per approved Material Submittal and approved detailed shop drawings.

Supply and return air grilles and diffusers shall be installed to suit sufficiently the reflected ceiling design as per approved drawings.

Ensure that all collars/plenums of louvers, grilles, and diffusers have adequate hanging brackets & clips are available for tight fixing the supports. Ensure that plenum is supported independently.

The connection to the diffusers shall be flexible and shall ensure no duct loads are transmitted to the installed diffusers.

Louvers shall be installed with wire mesh/plastic cover for protection from entering foreign objects or debris as per manufacturer instruction.

Completion of installation of all types of louvers, grilles, and diffuser fitting and accessories as per approved shop drawings and manufacturer instruction recommendation.

Sealing of all fixtures to walls and floor surfaces shall be as per approved sealant material submittals and manufacturer’s instructions.

Provide protection cover to all installed air inlets and outlets accessories during the remainder of the construction period

C. Inspection & Testing

After completion of the work, the site engineer & supervisor who perform an activity are required to raise an INR with a complete attachment & information regarding the scope of the inspection, including necessary drawings highlighted to show the scope of the inspection. He shall systematically check and inspect their work. The inspection shall be performed according to the approved typical Inspection Checklist and Inspection and Test Plans (ITP).

After the site engineer & supervisor complete their inspection and testing, INR shall be submitted to QA/QC Department which shall check and process the documents to have the completed work inspected by the supervision consultant for their approval.

Air balancing is to be performed by a third-party specialist approved by the consultant and the related method statement is to be submitted separately.

Note: INR must be processed and submitted to the supervision consultant 24 hours before the actual inspection and/or witnesses.

IX. Health and Safety Analysis

A. Risk Assessment

Refer to Risk Assessment/Job Hazard analysis in Appendix.

B. Protective and Safety Equipment

All workers involved shall be equipped with adequate PPE as stated below:

Safety Helmet with Company Logo
Safety Boots, Safety Goggles, Hand Gloves
High Visibility Vest
Welding-specific PPE (Welding Vest, Mask, Gloves, Visor)
Twin Tail Harness, Max 1m long (when working on height) All special PPE (Harness) are considered as last resort when we cannot engineer, administratively eliminate or guard against hazards.

C. Information to Personnel

Safety Induction
Job Training
Superintendents Notices/Memos
Toolbox Talks
Briefings before starting work

D. Permit Requirements

Vehicle permit for equipment
Working Permit
Night Work
Driving permit

X. Quality Assurance and Quality Control

A. Quality Assurance Requirements

The contractor shall provide the required documents for the consultant’s approval prior to initiating the execution of this activity as per project specifications.

The quality control requirement shall include related QCP’s, ITP, and other related documents as applicable.

Applicable codes and standards for materials

B. Quality Assurance Process

The contractor shall notify the engineer prior to the start of activity and comments from the site
instruction will be complied with as per the contract.

C. Follow-up and Evaluation

Follow-up on quality performance shall be carried out through an in-house monitoring system such as progress reporting to the planning department, and daily, weekly and monthly reports generated by the planning department to closely monitor site performance in general and reflect on quality performance in specific.

All the above shall be conducted in close coordination with the quality department to monitor any deviations from the normal quality requirement and induce corrective actions whenever required to eliminate non-conformance or quality deviations.

All remedial actions to be taken, if any, shall take into account the official schedule which is to be used as a guideline for performance and most importantly under the close supervision of the quality control department.


Checklists (CL)
Inspection Request (INR)
Inspection and Test Plan (ITP)

XI. List of Appendices

Appendix A:
Appendix B:
Appendix C:
Risk Assessment (RA)
Inspection and Test Plan (ITP)
Checklist (CL)

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