High-strength, lightweight precast concrete is often used to build foundations and basements. The initial methodology to make sure that safety practices are followed is to organize different pieces of training and workshops to help employees stay safe and avoid hazardous incidents. Applies 4 features (each with 65% coverage) under the '3S' principles of Standardisation, Simplicity and Single integrated elements (refer to Table 1). The risk and loss that occur with risk depend on the level of hazard and how it can be avoided. Grade of concrete will be according to approved concrete design mix. And for the last step, the process will be implemented and imposed. If necessary, suitable, and safe working platforms will be provided in all locations required to allow a clear and easy approach for the workers to produce quality connection details. Pumping of concrete shall only be permitted after approval from Company. The goal of quality and safety management is to stop the occurrence of accidents, requiring them to take initiative to prevent accidents from occurring. This makes it a perfect option for both residential and commercial jobs. Totally precast concrete floors are composed of units, which are totally cast at the . All grid lines should be given to the primary contractor for each zone and benchmark level. Below is the equipment involved in blinding works: All the related documents such as shop drawings, method statements, material approvals, subcontractors approvals, test certificates, etc must be available on the site. Precast concrete construction advantages. Reinforcement will be fabricated in the steel workshop according to the detailed approved shop drawings considering the (Grade, type, diameter, black/FBE coated, length, number, spacing ). For over 10 years, Megawide has been building high- and mid-rise projects using precast elements and believes that this construction method will define the future of affordable housing. It consists of large walls and floor concrete panels connected in the vertical and horizontal directions. Apply the concrete to balance the portion of the beam. These pads are set slightly lower than the brackets so that the stairs are pitched forward for water run off. Quality concrete sheet piles on sale - you can find concrete sheet piles from the most reliable . After the initial set of the concrete and when the concrete is hard enough to not be damaged by such an action, the exposed concrete surface shall be covered with drenched hessian sacks. The pile footing in the ground is formed with concrete formations around the contracted sections, thereby increasing the bearing . 1. Cleaning the moulds using the air pressure prior to cast. Large Panel System. Precast concrete's density effectively reduces sound and creates a privacy zone when it is used as a barrier in large-scale construction projects. If during concreting, rain is imminent sufficient plastic/canvas sheets should be on hand to cover the entire casting area. 1. METHOD STATEMENT ON THE REPAIR OF PRECAST BEAM DEFECTS, MISSING CAPPING LINKS AT PRECAST BEAM 2PT4-4a AND 2PT14 PROJECT: SENGKANG N4C3 PROCEDURE 1) Drill the required holes to a minimum depth 90 mm. to download more health and safetyvarious documentssuch as risk assessments, method statements, safety inspection checklists, safety forms, proceduresand safety guidelines, keep visitingmy site at qhsedocuements: This method statement aims to describe the procedure that will be adopted for the erection of Precast and Pre-stressed Concrete Elements. The grade of concrete strength shall be as per the project specification for the superstructure. When identical members are cast, it is advantageous for the same formwork to be used. Inspection records, ie. Ensure the MEP clearance is obtained prior to start the concrete blinding works. Storage area shall be even and stable enough to support the weights of the precast components. Dimensions - Unless otherwise specified, the minimum length of each barrier section will be 10 feet. The water curing will be applied to every part of the concrete surface by covering the whole surface closely by wet burlap sheets until the compressive strength reached 70o/o of the specific strength but not less than 7 days after placement. The Builder Assist Precast Concrete Panel Installation SWMS is the . Concrete is to be placed as close as possible to its final position and not moved laterally by vibration. Once delivered to site the concrete will be placed in one of three manners: The method to be used shall depend on site conditions and pour volume. Quality Control is briefly mentioned in this methodology, for more details, refer to the following documents: ISO-QP-8.2.4 and GEN-QP-001. The scaffolding erecting will be carefully inspected, observed, and coordinated with the primary contractor to make sure accessibility to other areas of work. This civil work method statement shall address the requirements of project site operations applicable for the supply and placing of structural and nonstructural concrete pouring on the construction work project. PPC Column alignment shall be done, and line, level, verticality, and straightness shall be kept as per the approved erection design and or layout. Mould joints shall be properly sealed to prevent any grout leak. Detailed description for all manufacturing processes starting from casting moulds preparation till the delivery of the product to job site. The moulds for the fabrication of precast components shall be purpose made of steel. INVESTIGATION AND EVALUATION OF DAMAGED CONCRETE SURFACES 3. A field survey and stakeout of the existing cast in situ dimensions will be performed to permit accurate placement of Precast/prestressed concrete elements. Part 1: Management and control Principal Contractor: The name of the Contractor in charge of the site. The steel guide to fix the electrical boxes at both surfaces of the mold and timber guide to fix the block outs and recesses. Spreading the concrete all over the mould. Reinforcement cages will be transferred to the production area and placed in the moulds. 8.2 Fresh concrete tests shall be carried out in accordance with EN 12350-2:2009. 5.3.2 Concrete surface within the formwork shall be saturated with water within 24 hours prior to grouting. Your email address will not be published. Test cube reports The under-discussiontopic for today is the method statement for the precast and prestressed work uploaded by qhse documents in free and editable reedyto use format. Elements will be supported over the trailer by a special belt or steel chain fixed to the trailer. Hand Compactors 4. pre-pour and delivery inspection checklists Smoothing the concrete surface will be done using the hand trowel. SAFETY & ENVIRONMENTAL RISKS . Method Statement For Construction Of Concrete Piles. Although they are thinner and lighter, they provide more strength than a concrete blocks, and are more resistant than other types of walls to fire, termites, and dry rot. Ensure the source of supply of ready mix and grade of concrete. Fabrication Tolerance. Here is the method statement for precast boundary wall works. 8246. Precasting reduces construction time because the manufacturing of the elements is carried out beforehand. CONCRETE REMOVAL 3.1 Impacting method (for honeycombed and exposed re-bar) 3.2 Grinding (for abrupt or gradual irregular surfaces) 3.3 Cutting 3. 1. Excavator/Backhoe 2. Elec. The exact position of all works will be established by the main contractor from control points, which are shown on the panels and in conjunction and as agreed with the Engineers surveyors. Since stairs are cast at our facility using existing molds, they are very economical and our quality is always consistent. PLANT AND EQUIPMENT: 1. Curing shall be continued as per the project specification/standards. All steel reinforcements shall be from approved supplier or from client designated supplier. Precast concrete units must be straight and true to size and shape and comply with PCI MNL 116 and the following product tolerances: a) Overall height and width of units, measured at the face exposed to view, as follows: 1. Materials test reports by either supplier / precaster. Crane will be used for loading and off-loading the Precast/prestressed concrete Segments. For the external panels, first the outer-skin (white concrete) will be casted and compacted by the table vibrator, immediately after casting, a layer of the polystyrene thermal insulation with a specific thickness will be provided over the concrete, then finally, the inner-skin (grey concrete) will be casted and the concrete will be compacted by hand vibrator to avoid causing damage in the outer skin. The ability to deflect or absorb sound also makes precast concrete a smart acoustic material. 4. All steel reinforcements shall comply to SS 2:1999 and SS32:1999, ASTM-A416 standards or other equivalent applicable standards. 3m or under, 3mm. method statements Safe Working Method Statements must be concise but informative and should contain the following information as a minimum. Precast floors can also be classified according to their manufacture into totally & partially precast floors. The smooth finish left by our steel forms . The total risk is equal to the work/product of severity and likelihood. Revi No. The precast components shall be lifted by overhead gantry cranes and using the demoulding/lifting hooks. Fig. This method statement was prepared by: R. Leveller. - INTRODUCTION. The moulds for the fabrication of precast components shall be purpose made of steel. Lifting shall be done under the supervision of certified Lifting Supervisor. 1. Precast concrete is reinforced concrete constructed by industrialized methods. The wooden wedges/polystyrene bottom and side support will be provided to eradicate breakages if needed. 4. OSHA has provided strict guidelines to various employers to manage operational safety in the concrete manufacturing industry. However, this process is not a one-time effort as it needs to be done repetitively. Should the test fail, the concrete shall be returned to the supplier for replacement. Major repair works shall be done according to approved method statement. To ensure better compaction of concrete, the moulds if applicable, shall be fitted with mould vibrators. Typical sketch for lifting &erection of slab in attached Lifting and Erection drawings. Precast is a method for industrialized construction. Inspection records, ie. Best Editable Construction QHSE Documentation Portal. December 9, 2019. Precast/prestressed concrete elements shall be transported and shifted to the worksite only after the Quality Control department/personal final inspection and Approval. 3.2 PE/SE Project Engineer/Site Engineer Precast concrete manufacturers strive to achieve the best finish on all structures, whether products are destined for a downtown building veneer or buried in a backyard. Megawide is currently building six projects with precast elements, totaling around 12,000 units. The PQP consists of Quality Control plans, manual and procedures, detailed operation control, inspection forms, repair methods and other records that are used in the manufacturing process. The process include detailed design, workshop drawings, Sequence of work, Quality Control System, Tolerances, Risk involved and risk controls, Housekeeping, to be adopted during the erection of Precast . Casting shall only commence upon inspection and approval by the client representative. Precast concrete steps are widely used for entrances to residential and . Cast-in-situ piles/foundation shall be accomplished as per the approved layout & drawing. In case of lifting horizontally, a flatbed truck is used to transfer the panels to the stock area. 3. This method statement outlines the procedures to be followed in the protection of the existing gas pipelines using precast concrete slabs at locations shown on contract drawings and as directed by Client / Consultant. Precast Concrete Panel Installation SWMS. METHOD STATEMENT CONSTRUCTION OF PRE-CAST. Characteristics - The most commonly used construction . This step helps to promote general understanding between all departments. We begin the process by learning more about the intended use of . The access road should be prepared by the main contractor to receive trailers transporting the Precast/prestressed concrete units. engineer using proposed plants and equipments and mixing method. any lifting gear attached to the precast concrete element, and the method of lifting ; . Concrete is not to be dropped from a height exceeding 2m. other 3 at 28 days. 2. This method statement describes the practices and methods to be used with regards to placing, curing and defect rectification of concrete works & blinding concrete. 2) Clean the drilled holes of loose particles and concrete dust. Blinding concrete for the structures and trenches will be placed using a pump. All concrete to be used in the production shall be approved by the client or the appointed QP. Required fields are marked *. Test cube samples are prepared following client's specification. Two additional projects comprising 6,000 units have started in . 7. Form release agent shall be used to strip the moulds without damaging the concrete. Date: 01/03/11. Wooden spacers should be used; all spacers should be stacked exactly on top of each other. Operational Control Procedures. Scope:- Detailed description for all manufacturing processes starting from casting moulds preparation till the delivery of the product to job site. The manufacturing of precast components shall be executed based on the shop-drawings and specifications approved by the client. Materials test reports by either supplier / precaster Forklifts Precast Concrete pipe on storage and ready to use. SCOPE: Manufacturing the precast concrete element. bridges of low clearance and long span are constructed by preventing a loss of prestress due to load of the slabs and relieving excessive compression force generated on the upper . One layer of 1000 gauge polythene sheet shall be laid prior to arrangement of any blinding. Pinholes and concrete chip-offs shall be sealed/patch up using approved repair materials. to assure easy access, especially inside small rooms. Level Guides shall be installed for the level maintenance of concrete. The moulds for the fabrication of precast components shall be purpose made of steel. The shutters will be side supported by steel bars to maintain the proper alignment of the forms. Why are non-linear accident models not used more often in workplace accident investigations? 4.1 CONSTRUCTION CONSIDERATIONS The contractor should consider the following: All safety issues on site when handling precast elements, especially so when working within a tight site The QC shall ensure that all repairs are carried out under his direct supervision. Precast construction method involves setting up of casting yard, production & stacking, transportation and erection of precast elements. The precast stairs are then set on the brackets and pads using a boom truck. The risk factor ranges from 1 to 9, where 1 to 3 is low to moderate, 4 to 6 is moderate to severe, and 7 to 9 is severe to extreme. 6. Make sure that the proper approvals for the detailed shop drawings for the sub-structure regarding the raft foundation/base with all related other required and provided drawings. Cast in-situ steel reinforcement shall be provided as per the approved steel reinforcement drawing. 5. Purpose and scope. As better quality control can be exercised in the factory or yard site, concrete of superior quality can be produced. 3) Fill up the holes with the approved chemical Hilti HIT-RE 500. To see this page as it is meant to appear, please enable your Javascript! Post production and delivery inspection shall be carried out by precaster and to be approved by the client representative. The [], Your email address will not be published. the best bushcraft knife in the world. Make sure that before the erection of Precast & prestressed concrete (PPC) elements is started, the project surveyor will observe and verify by correct field measurements as per the drawing, location of bearing pads, M&E-related service accessories etc. These will be used to catch the legs at the back of the stairs. The following records shall be maintained by the precaster during the production period: This article is about Fabrication Method Statement for Precast Concrete Panels. Construction joints shall be in the locations as indicated in the drawings, or as submitted in a proposal and always at right angles to the structural members axis. While the Precast/prestressed concrete elements are being lifted for loading or off-loading, a proper signboard will be kept if the operation time is more, or a competent person will be advising, educating and inducting the visitor or public away from the crane boom. Our Trench Systems, Pull Boxes and Handholes are utilized for below-ground substation control, communications and power cables, waste water recovery systems and PHONE: 207-324-7474 or 207-324-7215 Concrete Products Catalog September 2009 Precast concrete is traditionally used for the following types of repairs All pipe penetrations are gasketed. Moulds shall be rigid, even and flat in order to provide good quality surface finishes. Compaction of concrete shall either be by poker and/or mould vibrators Curing of concrete is ambient curing only. It is convenient to establish precast yard and to erect the precast elements at (near) site which speeds up the process & prevents delays in large scale construction projects . Shoring Boxes/Shoring/Sheet Pile (where necessary) 3. All loads have to be secured with appropriate ropes, straps or chains. This process also includes employee feedback, which benefits the training plan with continuous improvisation and that will lead to a decrease in the accident rate. Steps. (JSA) or Safe Work Method Statement (SWMS). End of preview. While management is developing a plant safety management plan, the risk assessment is conducted using the following five steps: The first step includes setting up a multidisciplinary task force. After this step, they are asked to identify hazards in the plant. The Precast Concrete Panel Installation Safe Work Method Statement breaks the tasks down into logical job steps, lists the typical hazards associated with each of these job steps, and describes the control measures implemented to eliminate or control the risk for the workers safety.. The employer not only needs to design the training to help employees follow safety procedures, but the training methods should be equally cost-effective and effectively engaging. To ensure better compaction of concrete, the moulds if applicable, shall be fitted with mould vibrators. BENEFITS OF PRECAST Precast concrete panels have a distinct advantage over other materials such as brick, concrete masonry, cast-in-place concrete and EIFS. Precast Concrete Panels should be clearly identified to allow traceability & correct erection positioning. Any patching, grouting or other such compound to be used for rectification works shall be submitted to and approved by consultant prior to its use. All the precast Precast/prestressed concrete Elements will be delivered to the site as per the sequence required to ensure continuous erection. Work procedure 1. All the concrete encased ducts installation shall be approved from the Engineer. Factory shall fabricate the precast components and deliver them to construction site. Each method can be selected according to the site conditions; each shown below. METHOD STATEMENT CONSTRUCTION OF PRE-CAST MANHOLE Page 2 of 6 INTRODUCTION This method statement applicable construction of manhole for varies pre-cast manhole size (1200mm - 1800mm dia) using open excavation method. It is characterized by dividing the building into components, which are manufactured in a precast concrete plant, and transported by special transportation equipment to the site. Ladders may be used in some conditions (ex-Grouting, etc.) 2. A Source of Free Quality, Health, Safety and Environmental Documents in Editable and Ready-To-Use Format for Worldwide Community, Copyright 2022 | Developed By: Huzaifah Asad for QHSE Documents |. The PQP consists of Quality Control plans, manual and procedures, detailed operation control, inspection forms, repair methods and other records that are used in the manufacturing process. Boxes, Pipes etc ) at the bottom of the moulds. pre-pour and delivery inspection checklists, 2. 7.6 Project-specific checklists and forms. The second step is to identify hazards. Advantages of precast concrete: Precast concrete has several advantages over cast-in-situ concrete: 1. out by experienced operatives who will be supervised during the whole of the works. All materials used for form-works should be clean strong and clear from any deflection. Cold joints of more than 40 minutes shall be avoided. Precast form slab will be placed on precast beam as per attached propping details &design. Demoulding of precast rc beam and slab shall commence only when the concrete have achieved the required design strength, ie. Curing compounds if used shall be approved and of the clear type. Moulds shall be rigid, even and flat in order to provide good quality surface finishes. Concrete is not to be over vibrated. Because precast panels are manufactured well in advance of installation, they are ready for transportation to the job site at a moment's notice. Repairing works for any well-known defects in precast /prestressed concrete elements shall be accomplished using authorized restoration materials or any system-authorized fabric. The finished surface of the product shall be according to client's requirement. The action to be take to resolve any non-conformity will be proposed by main contractor and subsequently approved by consultant. Calibration reports, PRECAST ACTIVITY OVERVIEW. That that is is that that is not is not is that it it is, Australian Institute of Health and Welfare. Compaction of concrete shall either be by poker and/or mould vibrators Curing of concrete is ambient curing only. Hand Tools. This step is followed by the determination and likelihood of the risks. Save my name, email, and website in this browser for the next time I comment. Hollow core Slabs will be placed on beam CIS retaining wall corbel as per the attached details & design. Precast stairs have a smooth form finish and can be cast with integrated non-slip tread as requested. 4. Method Statement; A work instruction detailing technical/engineering methodology for a particular . This is to be done at least 24 hours after the completion of concrete placing or a concrete surface retarder may be used. All calculations and drawings mandatory to develop the correct positions of the work will be tidily made and will be readily available to the project or site Engineer for review and approval. All activities related to the construction of reinforced concrete precast segments will be carried out in the precast yard, located in Road 11, Long Binh Ward, District 9 (HCMC), covering approximately 40,000 square metres of area, including: .

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