How To Calculate The Total Load Over RCC Footings?

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