Method Statement Slab & Beam Concreting

Proposed Construction of 500 Nos. Housing Units at Hospital Premises, Angoda State Engineering Corporation of Sri Lanka Slab concreting in Blocks

Method Statement

Method Statement Slab & Beam Concreting

SEC - 1892

Proposed Construction of 500 Nos. Housing Units at Hospital Premises, Angoda State Engineering Corporation of Sri Lanka Slab concreting in Blocks

Method Statement

INDRODUCTION A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, 100 millimeters thick, are used to construct floors and ceilings, while thinner slabs are also used for exterior paving. MATERIALS The materials to be used for concrete beam and slab in al blocks include, but are not limited to the following. 1. 15 mm thick Plywood Sheets 2. 50 x100mm Timber 3. 50x50m Timber 4. 50 mm GI Pies 5. Accrow Jacks 6. Various formwork accessories 7. Reinforcement “Lanva” (Approved by the Consultant) 8. Early Strength Concrete Grade 25,as approved by the Consultant EQUIPMENT & MANPOWER The equipment and manpower to be used in this work include, but are not limited to the following: Equipment 1. Concrete Batching plant 2. Concrete truck mixer 3. Concrete pump 4. Buckets /Wheel Barrows 5. Poker vibrator 6. Tools and accessories Manpower 1. Site engineer 2. Civil Superintendent 3. Forman 4. Skilled workers 5. Operators/Drivers 6. Helper/Labour

SEC – 1892

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Proposed Construction of 500 Nos. Housing Units at Hospital Premises, Angoda State Engineering Corporation of Sri Lanka Slab concreting in Blocks

Method Statement

METHODOLOGY FORMWORK Beam 15mm thick plywood shall be the formwork of the beam. The bottom of the beam should be fixed on 50 x50 mm timber. The 50 x50mm timber to be placed in position and supported with accrow jacks in 600mm intervals. The 50 x50mm timber frame horizontally fixed in side boards and the 50 mm GI pipes are horizontally fixed to both sides and 50 x50mm timber fixed vertically. Thread bars and Form ties should be used to tighten the vertical sides of the Beam formwork. Slab Slab formwork shall be 15mm thick plywood. The slab formwork shall be placed on top of a 50x50mm timber frame. The GI pipes should be placed 600mm intervals on the 50x100mm timber at the same interval and supported with accrow jacks. The levels of the slab and the beams shall be checked after the completion the reinforcement work. REINFORCEMENT Reinforcement shall be laid according to the Structural Drawing and up to the satisfaction of the Engineer. The reinforcement shifting and binding shall be started as soon as shuttering is completed. Reinforcement binding shall continue as formwork and shuttering work is progresses. The conduits shall be laid on top of the bottom net as per the Electrical Drawings. After completing formwork and reinforcement necessary approval would be asked for the concreting. CONCRETING 7 days early strength Grade 25 Ready mix concrete with 150mm slump shall be placed into beam and slab. The poker vibrator shall be inserted to give sound compaction. Top of the concrete level shall be maintained properly while concreting. REMOVAL OF FORMWORK The formwork shall be removed as not to cause any damage to concrete due to shock or vibration at the end of 7th day. CURING After 24 hours of laying concrete, the surface shall be cured by flooding with water. The curing shall be done for a minimum period of 7 days. INSITU TESTS & LABORATORY TESTS  Concrete that arrive at site will be checked for slump. 

Samples will be taken for compressive strength test as per the QA requirements for normal production quality control and stressing.

SEC – 1892

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