Dead loads are permanent static forces acting on a structure, typically including the weight of structural elements and permanent fixtures.

Formula: DL = Volume × Density

To calculate dead load:

1. Select a material from the list or enter custom properties
2. Enter the dimensions of the structural element
3. Click "Calculate Dead Load"
4. Add multiple materials to calculate total dead load

Live loads are temporary or movable forces acting on a structure, including people, furniture, and equipment.

To calculate live load:

1. Select the building type to get recommended live load values
2. Adjust the live load value if needed
3. Enter the area of the floor or roof
4. Apply any reduction factors if applicable
5. Click "Calculate Live Load"

Wind loads are lateral forces caused by wind pressure on the structure.

Formula: F = 0.5 × ρ × Cd × A × v²

To calculate wind load:

1. Enter the basic wind speed for your location
2. Select the terrain category
3. Enter the building dimensions
4. Adjust importance and topography factors if needed
5. Click "Calculate Wind Load"

Seismic loads are lateral forces caused by earthquake ground motion.

Formula: Vb = Cs × W

To calculate seismic load:

1. Select your seismic zone
2. Enter the soil type at your site
3. Enter the building height and weight
4. Adjust response and importance factors if needed
5. Click "Calculate Seismic Load"