# How to Calculate Load on Footing for Structural Support

Calculating the load on a footing is a crucial step in structural engineering to ensure the foundation can adequately support the weight of the structure it carries. The load on the footing is determined by considering various factors such as the dead load, live load, soil bearing capacity, and any additional loads. Here’s a step-by-step guide on how to calculate the load on a footing for structural support:

## Step 1: Determine the Type of Load

1. Dead Load: The dead load includes the weight of the permanent components of the structure, such as walls, columns, beams, and the roofing system.
2. Live Load: The live load represents the temporary or variable loads imposed on the structure, such as the weight of people, furniture, and equipment.

## Step 3: Determine the Footing Area

1. Soil Bearing Capacity: Identify the soil type and its bearing capacity at the construction site. The bearing capacity indicates the maximum load the soil can support without settlement.
2. Calculate the Required Footing Area: Divide the total load by the allowable soil bearing capacity to obtain the required footing area.

Required Footing Area = Total Load / Allowable Soil Bearing Capacity

## Step 4: Select the Footing Type

Based on the required footing area and the specific site conditions, choose the appropriate footing type, such as spread footing, mat foundation, or pile foundation.

## Step 5: Verify Structural Integrity

Ensure the selected footing size and design satisfy the structural requirements, including safety factors, depth of footing, and reinforcement details.

## Example:

Let’s consider a residential building with the following loads: