SENSASI ARMADA SDN. BHD.
METHOD STATEMENT STRUCTURAL CONCRETE WORK INTRODUCTION
Concrete is composed of cement, sand, aggregate (sized stone), and water. When mixed in the correct correct amounts, concrete is a stable stable and versatile versatile building building medium which can be used in a variety of ap plications ranging from roads, bridges and buildings, to septic tanks and even counte countert rtops ops for househo household ld use. use. The versat versatili ility ty in buildi building ng applica applicatio tion n is accompl accomplish ished ed by alteri altering ng the propor proporti tions ons of air and other other variab variables les in the mixtur mixture. e. Strengthening materials such as re-bar, fiberglass strands, and plastic rods are then a dded. OBJECTIVE
Method on how the concreting works are carried out safely. PLANT, MACHINERY AND EQUIPMENT
Tower Tower Cran Cranee / Mobi Mobile le Cran Crane, e, Concr Concret etee Pump Pumps, s, Concr Concret etin ing g Buck Bucket ets, s, Vibr Vibrat ator ors, s, Wheelbarrows, etc. as applicable SAFETY REQUIREMENT
The following personal protective equipments (PPE) are required: 1. Hard Hats 2. Rubb Rubber er hand hand glov gloves es 3. Rubb Rubber er wate waterr boo boots ts 4. Safe Safetty Gog Goggl gles es 5. Safety Safety Harne Harness ss – Applic Applicabl ablee to working working at at height height
FORMWORK
Formwork is the surface, supports and framing used to define the shape of concrete until the concrete is self-supporting. It includes the forms on which the concrete is poured, the supports to withstand the loads imposed by the forms and the concrete and any bracing added to ensure stability. WHEN USING CONCRETE FORMWORK
1. Cert Certif ific icat atio ion n of desi design gn must must be provi provide ded d by suit suitab ably ly qual qualif ifie ied d perso person n (PE (PE Practicing Engineer) 2. All framing framing must must be complete completed d so it complies complies with with on site design design documentat documentation ion and manufacturer’s requirement. 3. Erec Erecti tion on of form formwo work rk scaf scaffo fold ld supp suppor orts ts must must be supe superv rvis ised ed by comp compet eten entt scaffolder registered with DOSH (Department of Occupational Safety and Health)
PREPARED BY: TIO KEAN HIN SAFETY AND HEALTH OFFICER REG. JKKP IS 127/438/2/1323
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SENSASI ARMADA SDN. BHD.
PREPARATORY WORKS
1. Request for design mix based on the concrete grades specified on the structural drawings. 2. Submit the proposed design mix to client / client’s representative for approval. 3. Carry out trial-mix of the design mix under the supervision of client’s representative. 4. Prepare and conduct concrete test cube testing under the supervision of client’s representative to determine the concrete design strength. Submit the results for approval. WORK METHODOLOGY
This is a generic Work Method Statement. All works beyond the scope of this WMS shall be subject to a “Job-Specific” ‘Job Safety Analysis’ (JSA). All construction workers engaged in the concrete pouring shall be ‘inducted’ into the job-specific JSA. 1. Erection of scaffold supports for formworks supervised by a competent scaffolder in accordance with PE’s design. All scaffold components supplied must be SIRIM approved. 2. Lay framings for beams and floor slabs as per PE’s design. Ensure all framing timbers are of specified size in good condition free from defects. 3. As the floor installation is proceeding, it is imperative that the electrician follows closely behind, to install the various conduits/wiring. All conduits and similar service installations are to be placed under the top chord bar of the lattice.beam girder to ensure sufficient cover to the mesh reinforcement. Similarly, the plumber should be on-site to locate his service penetrations and fire collars, which should fall within the area of the void formers. 4. The specified mesh reinforcement is placed over and tied securely. 5. Reinforcing mesh fabric shall be lapped two (2) traverse wires Plus 50mm. and spacer chairs to be used in between layers of mesh. 6. After all reinforcement re-bars and mesh are placed and tied in accordance with design drawing and prior to concrete pouring, the formwork is given a final blowing and cleaning out the dirt and scraps. 7. Submit request for inspection of structural members with client / client’s representative prior to concreting works using Structural Work (Reinforcement / Concrete) Inspection Checklist and Inspection and Test Plan. 8. Final inspections of formwork scaffold supports and props to be carried out and certified by competent person.
PREPARED BY: TIO KEAN HIN SAFETY AND HEALTH OFFICER REG. JKKP IS 127/438/2/1323
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SENSASI ARMADA SDN. BHD. 9. After approval sought, formwork is ready to receive concrete pouring. Pour the concrete on designated locations using concrete pumps and / or crane assisted concrete buckets. 10. Pour concrete from the lowest point to the final concrete level in one operation in horizontal layers. 11. Compact concrete by mechanical vibrators. Ensure that concrete is worked into corners of the structural members. 12. After the concrete has set, carry out curing works by applying curing compound.
RISK ASSESSMENT AND CONCLUSION
During Erection of Formwork Scaffold Support 1. Falling Object – Wear hard hat. 2. Fall from height – Wear safety harness and proper working platform. 3. Human Error - Training and Safe Operating Procedure. During Formwork Framing and Decking 1. Fall from height – Wear edge restrain safety harness and erect barricades. 2. Trip and Fall – carry out regular housekeeping During Concrete Pouring 1. Chemical Contact – Wear rubber hand gloves ,rubber boots and safety goggle 2. Hit by concrete bucket – Safe Hoisting Procedure 3. Failure of Support – site surveillance and monitoring.
Date Prepared: 18 February 2013 Reviewed By:
Lu Peng Khim - Project Manager
PREPARED BY: TIO KEAN HIN SAFETY AND HEALTH OFFICER REG. JKKP IS 127/438/2/1323
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