Snow Load Calculator

Result:

How the Snow Load Calculation Works – Step by Step

Understanding how snow load is calculated can help you determine the structural integrity of your roof during heavy snowfall. Below is a step-by-step breakdown of how each input field is used in the calculation, followed by the formula.

1. Input Fields and Their Role in Calculation

1.1 Roof Area (sq ft)

  • This is the total surface area of the roof in square feet.
  • It represents the part of the roof that is directly exposed to snowfall.
  • A larger roof area means more snow accumulation, increasing the total load.

1.2 Snow Depth (ft)

  • This is the depth of the accumulated snow on the roof, measured in feet.
  • More snow depth means a higher weight pressing down on the roof.
  • Snow can be light and fluffy or heavy and compacted, but for this calculation, we assume an average snow density.

1.3 Roof Pitch

  • The pitch of the roof determines how much snow remains on it versus how much slides off.
  • It is expressed as rise/run (e.g., 6/12 means the roof rises 6 inches for every 12 inches of horizontal distance).
  • Steeper roofs tend to shed snow more effectively, while flatter roofs accumulate more.
  • A pitch factor is applied to account for the effect of roof slope.

2. The Snow Load Formula

Once all inputs are provided, the total snow load is calculated using the following formula: Total Snow Load=(Snow Depth×Snow Density)×Roof Area×Pitch Factor\text{Total Snow Load} = (\text{Snow Depth} \times \text{Snow Density}) \times \text{Roof Area} \times \text{Pitch Factor}

Breaking Down the Formula:

  • Snow Depth: Input from the user (in feet).
  • Snow Density: An estimated 20 lbs per cubic foot (can vary based on snow type).
  • Roof Area: The surface area of the roof (in square feet).
  • Pitch Factor: A multiplier that adjusts the load based on roof pitch.

3. Understanding the Output

  • The final result gives the total weight of the snow load in pounds (lbs).
  • This weight represents the total force exerted by the snow on the roof.
  • Engineers and homeowners can use this value to assess whether their roof structure is capable of withstanding heavy snowfall.

Conclusion

This calculator helps you quickly determine the impact of snowfall on your roof, making it easier to take necessary precautions. If the calculated snow load is too high, consider removing excess snow or consulting a professional to ensure structural safety. 🚧