A May 13, 2022 Rev Date For Review JTI PBS ZSD DESCRIPTION MADE CHECKED APPR’D Client Katipunan Road, Balara, Quezon City, Philippines Project DESIGN AND BUILD OF HINULUGANG TAKTAK SEWAGE TREATMENT PLANT (STP) Taktak Road, Antipolo City, Rizal Contractor FREY-FIL and Toshiba Water Solutions (In Consortium) Engineer Method Statement: Key Plan CONSTRUCTION OF AIR BLOWER BLDG. AND FIRE FIGHTING BLDG. Project Document Code Type HTSTP MS Discipline Code Document Nº Rev PM 00017 A Contents 1. PURPOSE ...................................................................................... 2 2. SCOPE ........................................................................................... 2 3. GENERAL REQUIREMENT............................................................... 3 3.1. MATERIALS ................................................................................... 3 3.2. EQUIPMENTS AND TOOLS ............................................................. 3 3.3. MANPOWER .................................................................................. 4 4. INSPECTION AND TESTING ........................................................... 4 5. METHOD OF CONSTRUCTION ........................................................ 4 5.1. INITIAL SURVEY ........................................................................... 4 5.2. SETTING OUT ................................................................................ 4 5.3. CONSTRUCTION OF COLUMN, BEAM, AND SLAB ............................ 4 5.3.1 COLUMN CONSTRUCTION.............................................................. 5 5.3.2 CONSTRUCTION OF BEAMS AND SLAB .......................................... 6 5.4. CONSTRUCTION OF WALLS USING POLYWALL SYSTEM ................ 7 6.0 SAFETY REQUIREMENT ................................................................. 8 6.1 SAFE WORK PRACTICES ................................................................ 8 6.2 COVID-19 GUIDANCE, PRECAUTION AND MITIGATION ................ 9 6.3 HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL (HIRAC) 10 6.4 PERSONAL PROTECTIVE EQUIPMENT (PPE) REQUIREMENT ........ 11 7.0 INSPECTION AND TEST PLAN ..................................................... 12 8.0 APPLICABLE INSPECTION CHECKLIST ........................................ 13 9.0 APPROVED PLANS ....................................................................... 14 10.0 POLYWALL EPS PANEL ................................................................ 15 Page | 1 1. PURPOSE The purpose of this Method Statement is to provide information about construction method to be employ on the Construction of Air Blower Building and Fire Fighting Building. The foregoing procedures and methods are formulated to attain the scheduled program of the project within the prescribed contract time. 2. SCOPE This Method Statement applies to all works such as excavation including ground preparation, setting out, backfilling and compaction, concreting works, and other related to the construction of Air Blower Building and Fire Fighting Building as per project requirements and referring with the approved Specification and Drawing. AIR AND BLOWER BUILDING FIRE FIGHTING BUILDING Fig. 1.0 SITE DEVELOPMENT Page | 2 3. GENERAL REQUIREMENT The following lists are the manpower, materials, and equipment requirements for the construction of Air Blower Building and Fire Fighting Building. However, the quantities per item were not indicated, so it would not limit the Contractor against providing less than or more than the quantity would have been stipulated for such a thing. 3.1. MATERIALS Approval shall be obtained for all the materials with reference to the Engineer approved materials prior to commencement of activities, Materials Inspection Request will be submitted to the Engineer upon material arrival to the Warehouse. All materials must be stored properly as per Manufacturer’s recommendation. The material shelf life will be monitored as per Manufacturer’s datasheet. 1. Reinforcing Steel Bars, Gr. 60 2. Forms, props and shuttering 3. Scaffolding 4. Ready Mix Concrete 5. Burlap Mats 6. Polywall – EPS Panel (Exterior and Interior Wall) 7. Polywall Adhesives 8. PU Foam 9. Mesh Tapes 10. Cement mortar 11. PPE 12. Consumables 3.2. EQUIPMENTS AND TOOLS The following equipment and tools shall be used for the various activities. 1. Backhoe 2. Mobile Crane 3. Stake Truck 4. Boom Truck 5. Transit Mixer 6. Concrete Pump Truck 7. One Bagger Mixer 8. Service Vehicle 9. Survey Instruments 10. Concrete Vibrators 11. Shovels 12. Electric Grinder 13. PU foam gun 14. Electric Hammer/ Drill 15. Minor Tools Page | 3 3.3. MANPOWER 1. Project Engineer 2. QAQC Engineer 3. Safety Officer 4. Safety Aide 5. Project Nurse 6. Surveyor 7. Instrument Man 8. Heavy Equipment Operator 9. Service Driver 10. Foreman 11. Skilled Labor 12. Unskilled Labor 4. INSPECTION AND TESTING Site inspection and or approval shall be in accordance with the approved Inspection and Test Plan for all activities in addition to the Project Quality Plan of the Project. 5. METHOD OF CONSTRUCTION This section covers the work method to be apply in the construction of Air Blower Building and Fire Fighting Building. 5.1. INITIAL SURVEY Upon receipt of approved drawings and with the approval of the Engineer, an initial survey together with the Engineer shall be conducted to confirm the site and established construction limits. Proper fencing using board-ups/ bollards, caution tapes and site sign boards shall be installed prior to the construction activities. 5.2. SETTING OUT The surveyor shall set out the location of the columns according to the grids shown in the approved Plan and marked the elevations using pins and paint markings. 5.3. CONSTRUCTION OF COLUMN, BEAM, AND SLAB This covers the method to be implemented in the construction of columns, beams, and slabs. The construction will consist of three stages starting from the ground level up to the third floor level. The sequence of construction for each stages will not vary, which start by the construction of columns followed by beams and slab construction. The beams and slabs will be casted simultaneously to achieved monolithic connection. Page | 4 Fig. 2.0 5.3.1 Cross Section COLUMN CONSTRUCTION Upon determining the column location, reinforcing steel bars shall proceed in accordance to the steel reinforcement requirements as shown in the approved Plans. At the ground level along GL G, the column starter bars will be fix to the prolonging vertical bars of MBBR substructure as shown in Fig 3.1. On the other side along GL E, where the column will be sitting at the MBBR walls, the column starter will be fix as shown in Fig 3.2. Fig. 3.1 Typical Column Starter Bar at Ground Level Fig. 3.2 Typical Column Starter Bar at the Top of MBBR Wall All Steel reinforcement shall be adequately placed in the position shown on the approved Plan and firmly held there during placing and setting of the Page | 5 concrete. Ties shall be space in accordance to the Plan and shall be tied at all intersections. Ties shall be fastened on the inside. After completion of reinforcing steel requirements for each stages, it shall be offered to the Engineer for inspection. Upon Engineer approval, the formworks shall be placed and fixed in conformance to the approved Plan. Care shall be carried out to ensure that any formwork system is installed and supported correctly when applied on site conditions may vary. Prior to concreting works, confirm and establish all reference points and mark the limit of concrete elevation. Subsequently, the area is prepared for concrete pouring upon completion of formworks installation. The concrete shall be place by means concrete pump truck and deposited as nearly as possible in its final position using elephant trunk and discharge hose without causing segregation and displacement of the reinforcement. The concrete shall be compacted using vibrators during placement, and shall be worked around reinforcement and into corners of forms. The forms shall remain in place undisturbed for not less than 24 hours after concrete pouring. The removal of formwork shall be carried out only after the time when concrete has gained sufficient strength, at least twice the stress to which the concrete may be subjected to when the formworks are removed. The removal of column forms and shuttering shall be carried after 24 hours or as recommended by the Engineer. Care shall be taken in the removal of forms not to damage the concrete surface and avoid early removal of forms as this may incur premature cracks in to the concrete. Subsequently, the entire surface of the newly placed concrete shall be maintained fully wetted for 72 hours after the concrete has been placed unless otherwise specified. 5.3.2 CONSTRUCTION OF BEAMS AND SLAB For each stages of slab and beams construction, it shall be carried out by erecting scaffolding for worker’s access and slab shuttering support. The surveyor shall mark the elevation of soffit of slab and beams. Install the required forms of slab and beams. Ensure that base jacks are provided for level adjustment just in case there is discrepancies. The columns shall be braced and provide shuttering for the remaining column height up to the beam level. For safety, edge protection shall be provided along the perimeter. Thereafter, fix the beam reinforcement and anchored it into the column bars. The installation of steel reinforcement shall be according to the approved Plan. Ensure that bottom reinforcements shall be lapped within 1/3 beam span from supports while the top reinforcement can be lapped at midspan. Page | 6 After completion of beam reinforcement, start fixing the required slab reinforcement. Ensure that all MEPF inserts are installed before fixing of top reinforcement. Upon completion of reinforcement installation, it shall be offered to the Engineer for his approval. When approved, the area is prepared for concrete pouring by removal of unwanted materials. Prior to placing of concrete, ensure that top of concrete columns is roughened and provided with the approved bonding agent. Prior to concreting works, top elevation of the slab and beams shall be established. Subsequently, placing of concrete shall proceed upon approval of the Engineer. Concrete shall be place by means concrete pump truck and deposited as nearly as possible in its final position using elephant trunk and discharge hose without causing segregation and displacement of the reinforcement. Concrete shall be evenly spread in layers and thoroughly consolidated against and along the faces of all forms by means of immersion or needle vibrator. For safety purposes, workmen shall not be allowed to walk in the freshly mixed concrete with boots or shoes coated with earth or foreign substances. In no case shall the vibrator be operated longer than fifteen (15) seconds in any one location. The forms shall remain in place undisturbed for not less than 24 hours after concrete pouring. After the newly placed concrete had been sufficiently set, it shall be properly cured by covering the entirely with moistened burlap mats. The concrete shall be maintained fully wetted and in position for 72 hours after the concrete has been placed unless otherwise directed by the Engineer. The removal of forms, shuttering and props for the slab and beams shall be carried out after 14 days or when the concrete has gained at least 70% of its minimum specified strength as verified on its compression testing. 5.4. CONSTRUCTION OF WALLS USING POLYWALL SYSTEM The interior and exterior walls of the structure will be constructed using Polywall Expanded PolyStyrene (EPS) Sandwich Panels in lieu with the use of traditional concrete hollow blocks. These panels are fabricated used EPS, cement and sand that is bonded together using technical additives. Then sandwich with 4.5 mm calcium silicate board on both side. The panels can be installed up to 3 m high and 5 m long. Just the conventional method, it will require lintel beam beyond 3 m high and a stiffener column beyond 5 m long. a. The installation of panels shall be according to Manufacturer’s specifications as follows: b. Clean and Setup the area. Repair uneven or unleveled surfaces before cleaning the area. c. Wall positioning. Established reference line for wall panel installation. d. Prepare and apply the Polywall Adhesive on floor slab and between panels. e. Position and install the panel in upright position. Use levelling tool to check its alignment and correct accordingly. Then, drill and secure with dowel. f. Apply grout to panel joints and spray PU foam between panels and structural joints. Page | 7 g. Subsequently, smoothened the joints by grinding it. Apply waterproofing sealant on each joint, then put mesh tape on it and finally reapply waterproofing sealant to cover the mesh tape. h. Installing MEPF inserts by cutting out affected areas and fill with cement mortar. Please refer to Sec.10 for the approved datasheets of Polywall EPS Panels. 6.0 SAFETY REQUIREMENT 6.1 SAFE WORK PRACTICES Safety of the personnel and properties is to be given prime importance and all the works to be carried out causing any accidents of property damages. Construction premises shall be provided with adequate fire, emergency or danger sign and safety instructions of standard colors and sizes visible always Adequate access and egress shall be provided to the site for work. All personnel shall wear proper PPE’s. Worker’s welfare facilities shall be provided on site with proper shed for resting worker adequate supply of drinking water, with proper sanitary and washing facilities. All the equipment, tools and tackles being used for the work shall be in good condition and maintained. Good housekeeping practice shall be always maintained through cleanliness of building, yards, machine and equipment’s, regular waste disposal and orderly process, operations, storage, and filling materials. Regular toolbox meeting shall be conducted regularly on the procedures to execute the work safely. Safety monitoring frequency shall be performed on a daily basis. Ambient Air Monitoring shall be conducted in a different site for a quarterly basis in accordance with the Air Quality and Dust Management Monitoring Plan of the project. For prevention and control of air pollution, and to minimize emissions of airborne contaminants, a major area of emphasis for this project has to maintain combustion powered-equipment in proper condition. Also, open burning of debris was not permitted to in order to avoid smoke or fumes. For extremely high temperatures encountered during the summer months, work clothing was mandated to completely cover arms and legs while safety glasses with dark lenses were used to combat glare. Cotton gloves were issued to permit steel surfaces to be touched without causing burns. To avoid unsafe and unacceptable noise levels on-site and in the adjacent residential housing, the noise levels in the work areas were to be kept below 75 decibels. Equipment used shall be properly maintained to avoid problems with noise control equipment. Equipment that was not quite by design was kept a sufficient distance away from to avoid sound levels in excess of the specified limit. Also, hearing protection will be required to all personnel working around equipment producing high noise levels. For the confined spaces entry, the following are the important points to secure first prior to start of activity: 1. Obtain a copy of the entry permit and hazard assessment and review the hazards associated with the space; Page | 8 2. Ensure that the appropriate PPE, Rescue Retrieval Equipment and Communications Equipment are available and in good working condition; 3. Lock-out / Tag-out any hazardous energy that the entrant could be exposed to; 4. Conduct continuous air monitoring utilizing a multi-gas air monitor; 5. The space must be labeled with a confined space “DANGER” sign. A lifting permit will be secured (accomplished & signed) first prior to any lifting works execution. 6.2 COVID-19 GUIDANCE, PRECAUTION AND MITIGATION All works are to be in conjunction and adhering to the guidance and risk assessments put in place by FFT. these shall include but are not limited to following requirements and will be updated to suit any further government guidelines; Site Covid-19 risk assessment for FFT to be reviewed before commencing works Adherence to minimum social distancing protocol. Staggered break times, where required. Face shield to be used when required. Risk Assessment will be required for working within the minimum distance required. No sharing of tools; any tools and equipment that are shared must be cleaned before and after use Distancing from other site operations whilst executing task to be maintained at all times if this is not possible, works must stop and be reviewed Page | 9 6.3 HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL (HIRAC) Hazard Identification, Risk Assessment and Control (HIRAC) Page | 10 6.4 PERSONAL PROTECTIVE EQUIPMENT (PPE) REQUIREMENT Protective clothing (a jacket or protective suit) Safety shoes Personal hearing protectors Protective gloves (canvas or leather) Glasses / Eyes protection Respiratory Protection Helmet Safety Harness Page | 11 7.0 INSPECTION AND TEST PLAN Inspection and Test Plan (Civil Works) Page | 12 8.0 APPLICABLE INSPECTION CHECKLIST Inspection Checklist Page | 13 9.0 APPROVED PLANS Approved Plan Page | 14 10.0POLYWALL EPS PANEL Polywall EPS Sandwich Panel (Approved Wall System) Page | 15
