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Wise move to get the structural design and construction right. Many people are confused with the roles of the architect and the structural engineer. If you imagine the human body then the Architect decides on looks, colour of skin, how much fat, appearances generally etc. Whilst the structural engineer determines the bone structure (skeleton make-up), the joints cartilage, tendons etc.... and how the body stays stable under a heavy load, against strong wind loading, and even during earthquake ground motion. I am not sure if I can recommend someone on this platform - here to help. So... Hence, I have forwarded you an email details of someone who will able to help with Structural Design & Drawings complete. Visit: www.pase.pk Normally: This is what you need: 1. Architectural layout and elevations - By an Architect or prepared by yourself. 2. Structural design and detailing drawings and specification (inc foundations) - Structural Engineer can only do that - not an architect! 3. Drainage Design & Details - can also be drawn up by most structural engineer - normally public health engineer. 4. Electrical & Mechanical design (sockets, switches, lights AC etc locations are normally picked up on architects drawings) - by electrical/mechanical engineer, or yourself if you know what you want and where. Hope this helps,

@kHURRAM ALImakes a good point about staggered laps. Staggered laps are a good practice on columns, beams, walls and slab. 1. The reinforcement arrangement should be always be staggered to avoid, or reduce likelihood of large cracks or spalling. 2. The staggered laps should not be located in areas of high moment. This is what Eurocode EC2 guidance is for column - 4% max generally, to 8% max at laps (although this is always less in reality by staggered laps) . Columns have to be designed to be ductile and hence limits apply. The concrete takes compression load, whilst reinforcement takes tensile loads. In slender columns the failure is most case is due to bending. Therefore best to stagger laps for better performance. There is a technical reason behind these max limits so best to work within them, otherwise also difficult to prove otherwise to checking engineers and authorities.

The joint will be same as any RAFT slab. Pour first section of slab, with key (1/3 depth) in the middle (I am assuming a thick slab) to interlock the two pours; Ensure a water-bar is placed below the joint. 1. excavate; 2. Pour 50mm (2") of blinding concrete to provide clean surface; 3. Install water proofing if needed; 4. Fix reinforcement; 5. Place a water bar at joint (to stop any water seeping through the joint); 6. Place end shutter at joint with a "key-way" to interlock the second pour; 7. There are proprietary mesh for such joints, but not essential provided all loose cement paste is removed, joint cleaned with pressure jet wash; 8. Pour other half of slab.