Calculating the total load on Reinforced Cement Concrete (RCC) footings is crucial for structural stability. This includes the superimposed dead load, the load from plinth beams, and the self-weight of the structure. Below is a step-by-step guide to calculating the total load over RCC footing RF1.
Step-by-Step RCC Footing Load Calculation
1. Dead Load of the Brick Wall Over PB2
The dead load is calculated using the formula: Dead Load = Unit Weight × Volume
- Length = (Total span of slab – (2 × column length))= (3000mm – (2 × 450mm))
= 2100mm = 2.1m
- Depth = 2700mm = 2.7m
- Thickness = 230mm = 0.23m
- Unit Weight = 1920 kg/m³
Dead Load of Brick Wall over PB2
= 1920 kg/m³ × (2.1m × 2.7m × 0.23m)
= 2503.87 kg
2. Dead Load of the Brick Wall Over PB1
- Length = (Total span of slab – (2 × column length))= (4500mm – (2 × 450mm))
= 3600mm = 3.6m
- Depth = 2700mm = 2.7m
- Thickness = 230mm = 0.23m
- Unit Weight = 1920 kg/m³
Dead Load of Brick Wall over PB1
= 1920 kg/m³ × (3.6m × 2.7m × 0.23m)
= 4292.35 kg
3. Total Load Over the Plinth Beams
Load Over PB1
= (Self-weight of PB1 + Dead Load of Brick Wall over PB1)
= (1164.38kg + 4292.35kg)
= 5456.73 kg
Note: The self-wt. of the plinth beam is taken from the article
How to calculate the self-weight of RCC footings & plinth beams?
Load Over PB2
= (Self-weight of PB2 + Dead Load of Brick Wall over PB2)
= (776.25kg + 2503.87kg)
= 3280.12 kg
4. Self-Weight of the Stub Column
Self-Weight = Unit Weight × Volume
- Depth of Stub Column = 1000mm = 1m
- Sectional Dimension = 230mm × 450mm = 0.23m × 0.45m
- Unit Weight = 2500 kg/m³
Self-Weight of Stub Column
= 2500 kg/m³ × (0.23m × 0.45m × 1.0m)
= 258.75 kg
5. Total Load Over RCC Footing RF1
Total Load = (Load Transferred from Column C1 + 1/2 (Load from PB1 + Load from PB2) + DL of Stub Column + Self-weight of Footing)
= [(68.706 × 101.97) + 1/2 (5456.73 + 3280.12) + 258.75 + 476]
= [7005.95 + 4368.43 + 258.75 + 476]
= 12,109.13 kg
= 118.75 kN (As 101.97 kg = 1 kN)
Note: The total load from the column C1 is taken from the article 👇
How to calculate the total load over the columns?
The self-wt. of the footing is calculated in a separate article 👇
How to calculate the self-weight of RCC footings & plinth beams?
6. Factored Load Over RCC Footing RF1
Factored Load = (118.75 × 1.5)
= 178.12 kN
Click Here To See How To Calculate The Quantity Of Cement, Sand, And Bricks For 1 Cubic Meter
