Greenhouse Roof Pitch Snow Load Calculator

Standard Greenhouse Roof Pitch

The standard pitch for a greenhouse roof is 6 by 12, which is typically effective for shedding snow under most conditions. However, when using twin wall coverings, achieving this pitch may not always be feasible. To ensure structural integrity and compliance, design your greenhouse's internal structure in accordance with local building codes.

For further information on structural components and materials for greenhouses, refer to the National Greenhouse Manufacturers Association (NGMA). The organization emphasizes high-quality materials, design, and service. It also plays a role in education and collaborating with building code authorities for greenhouses.

How to Calculate Snow Load

Snow load is the additional weight on a roof structure due to snow and ice buildup. Calculating it is crucial for structural safety.

Calculate the Volume of the Snow on the Roof

Measure the roof’s footprint from the ground (length and width) for safety reasons. Multiply these to get the area.
- Measure the length and width of the roof from the ground.
- Multiply length by width to get the area.
- If the roof has a pitch, use a multiplier based on the pitch to adjust the area.
- Multiply the adjusted area by the snow depth in feet to get the volume.
Find the Snow Density

Snow density varies; fresh powder weighs less than packed snow. Use a snow weight calculator to find the density.
Calculate Snow Load

Multiply the snow volume by its density to get the snow load. If there’s a density range, calculate both minimum and maximum loads.