In building construction, various concrete members require different sizes and quantities of reinforcement. These members include footings, beams, columns, slabs, lintels, and more. It is crucial to determine the appropriate amount of reinforcement per cubic meter for each of these structures. Prior to the tendering stage, it is necessary to estimate the amount of reinforcement needed in order to calculate the approximate cost of the project or construction work. This estimation is a crucial step in the planning process of any reinforced concrete construction project.
Size and Quantity of Reinforcement for Building Works
Following table gives the estimated quantities of reinforcement and its size generally used for various building works:
| Sl. No | RCC Member | Quantity in kg/m3 | Size of reinforcement required |
| 1 | Column footings | 75 | 10mm or 12mm |
| 2 | Grade beams | 100 | 12mm, 16mm – 85% Stirrups – 6mm or 8mm– 15% |
| 3 | Plinth beams | 125 | 8mm diameter – 85%, Stirrups 6mm – 15% |
| 4 | Columns | 225 | 16mm, 20mm and 25mm – 90% Ties – 6mm or 8mm – 10% |
| 5 | Lintel beam | 125 | 12mm, 16mm dia – 85% Stirrups – 6 mm or 8mm – 15% |
| 6 | Sunshades | 60 | 8mm dia – 75% Distributer – 6mm – 25% |
| 7 | Canopy slab upto 2.0 m span | 125 | 10mm dia – 80% Distributor bars – 6mm or 8mm – 20% |
| 8 | Staircase waist slab | 150 | 12 or 16mm dia – 80% Distributor 8mm dia – 15% |
| 9 | Roof slab | ||
| (a) One way slab | 80 | 8mm dia – 70% Distributor – 6mm – 30% | |
| (b) Two way slab | 100 | 8mm dia – 100% | |
| (c) Square slab – 4m to 6m size | 150 | 10 – 12mm dia – 100% | |
| 10 | Main beams above 6m | 250 | 20mm, 16mm, 12mm – 80 – 85% Stirrups – 8mm – 15 – 20% |
The information provided regarding steel in the previous text is limited to estimation purposes only. Specifically, the data relates to round tapered steel and serves as an approximate guide for determining the quantity of steel required for various reinforced concrete (RCC) structures. However, it is important to note that this data does not provide an accurate representation of the steel required for all members of the structure. To determine the actual amount of steel necessary, drawings must be prepared after the structural design has been completed. These drawings will provide a more precise calculation of the required steel based on the specific design and structural requirements of the project.