High-rise Commercial Building Renovation Work

Work Methodology for Renovation Works of High-rise Commercial Building

Client: DHAKA CHAMBER OF COMMERCE AND INDUSTRY

65-66,  Motijheel Commercial Area, G.P.O. Box No 2641, Dhaka-1000, Bangladesh.

 

PACKAGE-2:PART-C, D, E: Dismantling & Demolishing, Civil and Plumbing Work AT DHAKA    CHAMBER OF COMMERCE AND INDUSTRY, 65-66, MOTIJHEEL COMMERCIAL AREA, G.P.O. BOX NO 2641, DHAKA-1000, BANGLADESH.

Project: Renovation and Restoration with facelift works at the Dhaka Chamber of Commerce and Industries

 

Work Methodology of the construction company WAZIPOINT SYSTEM, for Dismantling and Rubbish Removing of Brick works, RCC works and Renovation of Aluminium Work, Air conditioner Relocation, Fire Door Installation, Sanitary & Water Pipe Lines construction and weather coat & painting works in 6 to 12th floor building project. The works methodology is divided a per the part of the works in tender BOQ, Part-c, Part-D & Part-E as below:

 

PART_C

Below is a comprehensive work methodology for WAZIPOINT SYSTEM to execute the dismantling and rubbish removal of brick works and RCC (Reinforced Cement Concrete) elements, alongside the renovation of aluminium work, air conditioner relocation, fire door installation, and weather coat & painting works on a 6th to 12th floor building project. This detailed approach is designed to ensure safety, quality, and efficiency throughout the project lifecycle.

1. Project Scope and Pre-Planning

Scope Definition:

• Dismantling & Rubbish Removal:
• Brick Works: Systematic deconstruction of brick cladding, partitions, or facades, ensuring minimal impact on surrounding structures and effective segregation of debris for recycling or disposal.
• RCC Works: Controlled dismantling through precise saw cuts and segment removal, with immediate onsite support (shoring/bracing) to safeguard adjoining structures.
• Renovation & Replacement Works:
• Aluminium Work: Inspection, cleaning, repair or complete replacement of aluminium elements such as window frames or cladding for enhanced performance and aesthetics.
• Air Conditioner Relocation: Safe decommissioning, removal, and reinstallation of AC units—ensuring electrical isolation and secure mechanical mounting during transfer from existing installations to new designated positions.
• Fire Door Installation: Removal of outdated door sets (if applicable) and installation of certified fire doors within designated zones to comply with updated fire-safety regulations.
• Weather Coat & Painting Works: Surface preparation, priming, and application of protective weather coats and final paint finishes on building exteriors, designed for durability under high-rise environmental conditions.

Prior to commencement, a detailed site survey, risk analysis, design review, and permit confirmation are essential so that all operations respect local regulations and client specifications 2.

2. Site Mobilization and Temporary Setup

Logistics and Setup:

• Mobilization: Arrange specialized high-rise equipment (scaffolding, hoists, tilt tables, dust suppression units) and dedicate storage areas for tools, materials, and removed debris.
• Site Preparation: Erect safety barricades, establish clearly marked work zones, and set up designated rubbish collection and segregation areas to prevent cross-contamination of onsite waste.
• Team Briefing: Conduct comprehensive kickoff meetings to clarify roles, review risk assessments, outline emergency protocols, and set communication channels (e.g., radios) among teams.

This initial phase sets the groundwork for safe and efficient operations on the 6th to 12th floors.

3. Safety Management and Risk Mitigation

Risk Assessments & Protocols:

• Perform detailed hazard analyses for work at height, potential structural instability, and risks associated with dust and debris.
• Ensure all team members are equipped with rated personal protective equipment (PPE) such as helmets, harnesses, eye protection, and safety boots.
• Implement daily toolbox talks, continuous on-site safety inspections, and maintain open lines of communication for real-time problem resolution.

Emergency preparedness includes well-rehearsed rescue plans, availability of first aid resources, and clearly defined evacuation routes.

4. Detailed Execution Methodology

A. Dismantling & Rubbish Removal of Brick Works

Preparation & Setup:

• Site Marking: Identify and clearly mark brick sections scheduled for dismantling; protect adjacent construction elements using temporary supports where necessary.
• Debris Control: Establish engineered debris collection systems (safety nets, hoists, and chutes) to capture falling bricks and dust suppression measures (e.g., water misting).

Execution:

• Manual/Mechanical Removal: Gradually dismantle brick elements using pneumatic chisels, hand tools, or small demolition machines, ensuring each section is safely lowered.
• Debris Segregation: Immediately sort and load removed brick materials into designated containers for recycling or proper disposal while keeping pathways clear for movement.

B. RCC Works Dismantling & Debris Management

Preparation:

• Structural Assessment: Identify and document areas of RCC that require removal. Reinforce the surrounding structure using shoring or bracing techniques to maintain stability throughout the removal process.
• Cutting Lines and Segmentation: Precisely mark cut lines, taking into account reinforcement layouts and load-bearing considerations.

Execution:

• Controlled Cutting: Use specialized concrete saws (e.g., diamond-blade saws) to segment the RCC safely.
• Segment Removal: Extract each cut segment sequentially, followed by immediate installation of temporary supports where necessary.
• Debris Handling: Collect, sort, and compact broken concrete elements, and ensure effective dust suppression during the cutting process.

C. Renovation of Aluminium Work

Inspection & Preparation:

• Assessment: Identify worn, corroded, or misaligned aluminium components requiring repair or replacement.
• Surface Preparation: Clean surfaces using appropriate agents, sandblast or use corrosion inhibitors, and remove any existing sealant residues.

Execution:

• Component Handling: Carefully dismantle defective aluminium components and document the existing conditions for quality tracking.
• Reinstallation: Install new or refurbished aluminium elements with precise alignment and sealing to ensure efficiency, weather resistance, and aesthetic appeal.

D. Air Conditioner Relocation

Preparation:

• System Shutdown: Isolate and decommission the AC units by safely disconnecting electrical, plumbing, and refrigerant lines.
• Planning: Identify relocation points that optimize performance, ensure ease of maintenance, and meet structural load requirements on the new location.

Execution:

• Safe Removal: Use tilt tables and dedicated hoisting equipment to lower the AC units from higher floors.
• Relocation and Reinstallation: Reinstall the AC units, reconnecting all utilities and verifying that mounting structures are secure.
• Commissioning: Test system performance, recalibrate control settings, and document operational parameters.

E. Fire Door Installation

Preparation:

• Assessment: Determine the exact locations for new fire doors based on fire safety audits and building layout reviews.
• Procurement: Source fire-rated doors and hardware that comply with local fire regulations.

Execution:

• Installation: Remove any non-compliant door systems and install new fire doors with precise alignment. Ensure door frames are properly integrated into the building structure and that all sealing and closing mechanisms function flawlessly.
• Verification: Test for proper operation, sound fire rating certification, and accessibility for emergency evacuations.

F. Weather Coat & Painting Works

Preparation:

• Surface Cleaning: Thoroughly clean the exterior surfaces to remove all contaminants, loose paint, and other residues using power washing or sandblasting as needed.
• Surface Repair: Address minor defects (cracks, spalling) prior to coating application.

Execution:

• Priming and Coating: Apply a high-performance primer followed by a weather coat to ensure enhanced durability. Once cured, proceed with the final paint layers using either spray techniques for uniformity across large areas or roller/brush methods for detailed sections.
• Environmental Considerations: Monitor weather conditions (wind, humidity) to ensure optimal application and curing times, especially in a high-rise context.

5. Coordination, Quality Control, and Handover

Inter-Trade Coordination:

• Schedule sequential handoffs between demolition, renovation, and installation teams using collaborative project management tools. Maintain shared progress logs and hold regular coordination meetings.

Quality Assurance:

• Inspections: Employ senior engineers to conduct inspections at every stage—from dismantling through to final finishes.
• Documentation: Maintain robust records, including photographic evidence, inspection reports, and safety audits.

Finalization:

• Conduct a comprehensive walkthrough with the client and quality assurance personnel. Ensure all debris is cleared, non-structural elements are reinstalled correctly, and finalize the documentation for project handover.

6. Example Task Sequencing and Timeline

Task	Description	Equipment/Resources	Estimated Duration
Site Mobilization	Set up scaffolds, safety nets, and designated storage areas	Scaffolds, hoists, PPE, and communication tools	1–2 days
Brick Works Dismantling & Removal	Mark, dismantle brick units and safely collect/remove debris	Pneumatic chisels, hoists, and dust suppression systems	3–5 days
RCC Works Dismantling	Controlled saw cutting, removal of RCC segments, and immediate shoring	Concrete saws, bracing/shoring, dust suppressors	4–7 days
Aluminium Renovation	Inspect, prepare, dismantle faulty units, and reinstall new elements	Hand tools, cleaning agents, and sealants	2–4 days
AC Unit Relocation	Disconnect, remove, and reinstall air conditioners as per the new plan	Tilt tables, hoists, electrical/disconnect tools	2–4 days
Fire Door Installation	Remove old door sets, install new fire-rated doors, and verify functionality	Drills, fire-rated fixtures and hardware	1–2 days
Weather Coat & Painting Works	Surface cleaning, priming, weather coat application, and final painting	Paint sprayers, rollers, scaffolds	3–5 days
Final Inspection & Cleanup	Quality audits, final handover documentation, and site restoration	Inspection checklists, waste disposal tools	1–2 days

Final Thoughts

This methodology embraces a well-organized, step-by-step approach—from initial planning and mobilization through to detailed execution and final handover—to guarantee that every facet of the project is addressed with maximum safety, precision, and operational efficiency. By integrating advanced waste management practices, stringent quality controls, and precise coordination among specialized teams, WAZIPOINT SYSTEM can successfully manage the high-rise project with minimal disruption and high-quality outcomes.

 

 

 

 

PART_D

Below is a detailed work methodology for WAZIPOINT SYSTEM to execute the plumbing and water supply line works using uPVC and CPVC pipes and fittings in a high-rise project spanning the 6th to 12th floors. This methodology integrates precise installation procedures with robust scaffolding and safety measures to ensure a seamless, efficient, and secure operation.

1. Project Initiation and Planning

Scope Definition:

• Plumbing and Water Supply System:
• Materials: Use uPVC pipes for cold water and drainage systems, and CPVC pipes where hot water or chemical resistance is required. All installations will incorporate fittings such as elbows, tees, reducers, couplings, and support hangers as indicated in the approved design drawings.
• System Layout: Design and implement main lines, branch runs, and ancillary components such as valves and filters to create a comprehensive water supply network.

Pre-Planning Activities:

• Document Review: Evaluate blueprints, plumbing schematics, and design specifications to verify pipe sizes, flow rates, and junction details.
• Material Procurement: Source certified uPVC/CPVC pipes and approved fittings along with adhesives and solvent welds specific to these materials.
• Team Coordination: Assemble an experienced team, including site engineers, plumbing specialists, and safety officers, and schedule regular coordination and progress meetings.

2. Site Preparation and Scaffolding Setup

Scaffolding and Access:

• Scaffolding Design and Erection:
• Erect temporary scaffolding systems along the 6th to 12th floors ensuring that they are engineered to handle both personnel and equipment.
• Install guardrails, toe boards, and secure platform areas to provide a stable, secure working environment.
• Safety Measures:
• Ensure all personnel are equipped with fall-protection devices, such as harnesses and lanyards, along with hard hats, gloves, and safety boots.
• Conduct daily inspections of the scaffolding structures and access pathways, confirming stability and compliance with local safety standards.
• Site Organization:
• Establish clearly marked work zones and safe storage areas for tools and materials, minimizing cross-traffic and potential hazards.
• Set up a communication network (e.g., two-way radios) for constant updates between on-site teams and supervisors.

3. Detailed Execution Methodology

A. Layout, Measurement, and Pre-Installation

1. Pipe Routing and Marking:
• Review the approved plumbing layout on-site, marking designated pipe runs on walls, ceilings, and floors.
• Verify that access and alignment coincide with structural elements, ensuring seamless integration with existing services.
2. Material Preparation:
• Measure and cut uPVC and CPVC pipes accurately using proper pipe-cutting tools.
• Prepare all fittings by ensuring that socket surfaces are clean and free from debris, using recommended solvent welds or adhesives for uPVC/CPVC as per manufacturer guidelines.
3. Pipe Supports and Hangers:
• Pre-install supports, clamps, and brackets at required intervals, ensuring that the weight of the pipes and the pressure from water flow are adequately managed.
• Check that support installations adhere to spacing norms and load requirements for high-rise applications.

B. Installation of Plumbing Lines

1. Fitting Installation:
• Connect pipes using solvent welding techniques that guarantee strong, leak-proof joints.
• Ensure that all connections are verified against the design details, with special attention to changes in direction (elbows) and branch connections (tees).
2. Securing Pipelines:
• Affix pipelines securely along scaffolding-supported access, using pre-installed clamps and cable ties as necessary.
• Continuously check levelness and alignment during installation to avoid any undue bending or stress on the pipes.
3. Integration with Ancillary Components:
• Install valves, shut-off controls, and any necessary water meters or filters in line with the plumbing drawings.
• Where applicable, apply insulation on CPVC sections transporting hot water to prevent heat loss and ensure user safety.

C. Testing and Quality Assurance

1. Hydrostatic Pressure Testing:
• Once the system is completely installed, fill the pipelines with water and pressurize them to the design specification.
• Monitor pressure gauges to detect any potential leaks at joints or fittings and make corrective repairs immediately.
2. Final System Checks:
• Conduct visual inspections from both the floor and the scaffolding levels to verify the integrity of joints, supports, and the overall alignment of the pipelines.
• Document all test results and provide a comprehensive quality report for compliance and future maintenance reference.

4. Safety and Scaffolding Procedures

Pre-Work Safety Briefings:

• Hold daily toolbox talks emphasizing fall protection, proper tool handling, and emergency evacuation routes.
• Reiterate the importance of using personal protective equipment (PPE) and maintaining communication protocols throughout the workday.

On-Site Emergency Preparedness:

• Develop and display an emergency response plan that includes rescue procedures from scaffolding areas.
• Ensure that first aid kits are accessible and that at least one trained first-aider is present during high-risk operations.

Inspection and Documentation:

• Record daily scaffolding and work area inspections to maintain an audit trail of safety compliance.
• Use checklists to ensure that every phase of the installation—from pipe cutting to final testing—meets safety and quality standards.

5. Documentation, Handover, and Maintenance

Finalization:

• Compile detailed records including installation logs, test reports, scaffolding inspection sheets, and material certifications.
• Conduct a joint walkthrough with the client and quality assurance teams, addressing any final adjustments or recommendations.

Handover:

• Provide comprehensive system documentation which includes layout drawings, material specifications, and a recommended maintenance schedule.
• Offer training to building facility management on the operational checks and troubleshooting procedures for the plumbing system.

Example Installation Schedule

Task	Description	Duration	Key Equipment/Resources
Scaffolding Setup	Erecting and verifying scaffolding with safety gear	1–2 days	Scaffolds, PPE, guardrails, loss prevention tools
Pipe Routing & Measurement	Marking pipe paths and cutting uPVC/CPVC pipes	1–2 days	Measuring tools, pipe cutter, marking tools
Fitting and Assembly	Solvent welding and connecting pipes with proper fittings	3–5 days	Solvent weld adhesives, approved fittings, and clamps
Support Installation	Installing pipe hangers and securing pipelines along scaffolding	1–2 days	Supports, clamps, cable ties, and leveling tools
Hydrostatic Testing	System pressurization and leak checks	1–2 days	Pressure gauges, water pump, test equipment
Final Inspection & Handover	Quality control, documentation, and client walkthrough	1 day	Inspection checklists, documentation tools

Final Thoughts

This methodology is designed not only to implement an efficient plumbing and water supply system using uPVC and CPVC materials but also to ensure that work on a high-rise building is executed safely. The integration of robust scaffolding measures and strict safety protocols is vital in mitigating risks associated with working at height. Regular supervision, testing, and detailed documentation ensure that the final installation is reliable, compliant, and built to last.

Beyond the immediate installation, consider employing digital project management platforms to monitor progress in real time and schedule periodic maintenance to uphold system integrity over the years. This forward-thinking approach will ensure both the safety of onsite personnel and the long-term performance of the plumbing system.

 

 

 

PART_E

Below is a comprehensive work methodology for WAZIPOINT SYSTEM to execute dam proof work, plaster work, and weatherproofing of the outdoor wall on a 6th to 12th floor building. This methodology is designed to ensure durability, optimize material performance against moisture and weather conditions, and uphold the highest standards of safety and quality at elevated levels.

1. Project Initiation and Pre-Planning

Scope Definition:

• Dam proof Work: Application of damp-proof coatings or membranes along the exterior face to prevent moisture ingress. This may include using specialized water-repellent compounds or continuous membranes that act as barriers between the substrate and weather elements.
• Plaster Work: Providing a strong, even base layer on the outdoor wall using a mix of cement, lime, and suitable aggregates. The plaster not only offers aesthetic value but also acts as a substrate for the subsequent weatherproof coating.
• Weatherproof Work: Applying a high-performance weather coat to protect the plastered surface from rain, UV exposure, and temperature variations. This layer typically involves a primer, followed by one or more coats of weatherproof paint or sealant that offers both water repellency and enhanced durability.

Pre-Planning Activities:

• Document Review: Assess design drawings, substrate conditions, and environmental factors. Verify material specifications and mixing ratios for damproofing and plastering as well as manufacturer recommendations for weatherproof coatings.
• Material Procurement: Source certified damproof compounds or membranes, high-quality cement and lime-based plaster materials, and weatherproof coatings that meet external environmental standards.
• Team Coordination & Safety Planning: Assemble a specialized team including site engineers, plastering experts, and safety officers. Develop a comprehensive safety plan addressing the challenges of working on floors 6 through 12, with specific focus on scaffolding, PPE, and fall protection.

2. Site Preparation and Scaffolding Setup

Scaffolding and Access:

• Scaffolding Design and Erection:
• Install scaffolding systems that provide full and secure access to the outdoor wall from the 6th to 12th floors.
• Equip scaffolding with guardrails, toe boards, secure platforms, and non-slip surfaces to ensure fall protection.
• Safety Measures:
• Provide and enforce the use of personal protective equipment (PPE) such as helmets, harnesses, gloves, and safety boots.
• Conduct daily inspections of scaffolding, access ladders, and other working platforms. Establish exclusion zones to prevent access by unauthorized personnel.

Site Organization:

• Clearly demarcate work zones, materials storage areas, and zones for waste collection.
• Set up communication channels (e.g., two-way radios) between team leaders, safety officers, and workers for real-time coordination on the high-rise.

3. Detailed Execution Methodology

A. Damproof Work

Surface Preparation:

• Cleaning: Thoroughly clean the exterior wall to remove dust, loose particles, and any efflorescence. If required, lightly wash the surface with water and allow complete drying.
• Repair: Address minor cracks or imperfections with a patching compound to ensure a continuous, even substrate for the damproof material.

Application of Damproofing Material:

• Selection: Use a damproof mortar or a liquid waterproofing compound appropriate for high-rise exterior walls. In some cases, a membrane system may be employed if specified.
• Application:
• Apply the damproof compound uniformly using trowels or spray equipment as per the manufacturer’s recommendations.
• Ensure special attention to joints, corners, and areas of potential water collection.
• Allow adequate curing time so that a continuous, impermeable barrier is formed.

B. Plaster Work

Substrate Preparation:

• Confirm that the damproof layer is fully cured.
• If necessary, apply a bonding agent to enhance adhesion between the damproof layer and the plaster.

Mixing and Application:

• Mix Design: Prepare the plaster mix (typically a blend of cement, lime, and washed river sand) in proportions specified for external use. Add water-repellent admixtures if mandated to enhance durability.
• Base Coat Application:
• Apply an initial rough coat (approximately 10–12 mm thick) to establish a strong base.
• Use trowels or sprayers for uniform application, ensuring the mix is well compacted to eliminate voids.
• Finishing Coat:
• Once the base coat sets sufficiently, apply a finishing coat (around 4–6 mm thick).
• Trowel the finish to achieve a smooth surface that is primed for weatherproofing.

C. Weatherproof Work

Surface Preparation:

• After plaster curing (typically allowing 7–14 days depending on environmental conditions), inspect the plaster surface for cracks, dust, or imperfections.
• Lightly sand or patch the surface as needed to ensure an even substrate.

Application of Weatherproof Coating:

• Priming: Apply an appropriate primer that enhances the adhesion of the weatherproof coat and seals the plaster surface.
• Weatherproof Coating Layers:
• Using weather-resistant paint or sealant, apply one or more coats as recommended by the product guidelines.
• Ensure even application by using rollers or spray equipment suited for high-rise external surfaces.
• Monitor environmental conditions (wind, temperature, humidity) to ensure optimal drying and curing.

Quality and Curing:

• Allow proper drying time between coats and after the final application.
• Inspect for uniformity, proper film build, and absence of run-off or pooling.
• Document the layer thickness and overall appearance according to quality control protocols.

4. Coordination, Quality Control, and Documentation

Inter-Trade Coordination:

• Schedule sequential work: complete the damproof and curing period before proceeding to plastering, and similarly, finalize the plaster work prior to weatherproof coating.
• Hold regular coordination meetings among trade teams and supervisors to discuss progress and address challenges.

Quality Assurance:

• Inspections: Conduct inspections at every stage—with engineers verifying adhesion, thickness, and uniformity of the damproof layer, the plaster, and the weatherproof coating.
• Documentation: Maintain detailed records of material batches, mixing ratios, application methods, curing times, and final inspection results.

Final Handover:

• Provide comprehensive handover documentation comprising test results, photographic records of each stage, and maintenance recommendations.
• Conduct a final client walkthrough to confirm compliance with project specifications and quality standards.

5. Example Task Sequencing and Timeline

Task	Description	Equipment/Resources	Estimated Duration
Scaffolding Setup & Safety	Erection of scaffolds with full fall protection and marked work zones	Scaffolds, guardrails, PPE, and communication devices	1–2 days
Surface Preparation (Damproof)	Cleaning, patching, and priming the wall surface for damproof material	Brushes, cleaning agents, and patching compounds	1 day
Damproof Application	Uniform application of damproof compound/membrane across the wall	Trowels, spray equipment, and specialized waterproofing products	1–2 days
Plaster Base & Finishing Coat	Mixing and applying base and finishing plaster layers	Mixing tools, trowels, and bonding agents	3–4 days
Weatherproof Coating	Primer and weather-resistant paint application	Rollers/sprayers, primers, weatherproof coating	2–3 days
Quality Inspection & Handover	Final visual inspections, thickness checks, documentation, and client walkthrough	Inspection checklists, documentation tools	1 day

Final Thoughts

This methodology not only establishes clear step-by-step procedures—from damproof application through plastering to final weatherproof coating—but it also emphasizes the importance of robust scaffolding, rigorous safety protocols, and structured quality control on a high-rise project. Integrating these practices ensures that the outdoor wall performs reliably against moisture and weather extremes and contributes significantly to the building’s longevity and appearance.

In addition to the core steps outlined, WAZIPOINT SYSTEM may consider employing digital monitoring tools for real-time quality assessments, exploring innovative damproof products for enhanced sustainability, and scheduling routine maintenance inspections to prolong the service life of these treatments.