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Cold Climate Engineering

Snow Load Engineering

From the Canadian Arctic to the Alps, Champion buildings are engineered to shed and support heavy snow. We analyze ground snow loads, roof slope and drift patterns to ensure year-round safety.

The Challenge

Engineered for Extreme Winter Loads

Snow is a complex load. Unlike wind, it can accumulate and stay for months. Arch and gable roofs respond differently: arch roofs often shed snow naturally, while gable roofs must account for unbalanced loads when wind pushes snow to one side.

At Champion, we don't just guess. We use site-specific ground snow data (Pg) and apply exposure, thermal and importance factors to determine the true design roof snow load (Pf). Our tensioned PVC membrane creates a smooth, slick surface that encourages snow shedding.

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Drift & Unbalanced Loads

We calculate extra pressure from snow accumulation against parapets or on the leeward slope.

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Thermal Design

Engineering accounts for -40 °C design temperatures and internal heating effects.

Design Codes

Snow Load Compliance

We use regional data and international codes to calculate the precise snow requirements for your structure.

Standard	Region	Parameters Considered
ASCE 7-22	USA / Global	Ground snow Pg, Ce (Exposure), Ct (Thermal), Is (Importance)
EN 1991-1-3	Europe	Snow load on roofs, drift, snow guards, local coefficients
NBC Canada	Canada	Ground snow, rain load, specified snow load calculations
AS/NZS 1170.3	AU / NZ	Regional snow load s, shape coefficients
ISO 4355	International	Basis for design of snow loads on roofs

Load Ratings

Snow Load Classes

Indicative ground snow loads (Pg) we engineer for. Final design is always site-specific.

Class	Ground Snow Load	Typical Environment	Engineering Response
Light	1.0 kPa (21 psf)	Temperate regions	Standard truss spacing
Moderate	2.5 kPa (52 psf)	Northern plains, mid-latitudes	Reinforced chord members
Heavy	5.0 kPa (104 psf)	High altitude, sub-arctic	Heavier gauge steel, closer bays
Alpine	7.5+ kPa (157+ psf)	Mountain peaks, extreme north	Custom heavy-duty truss systems

Geometry Matters

Roof Design for Snow Management

How the building shape interacts with winter weather.

Arch Roofs

Naturally shed snow more efficiently than flat roofs. The curved profile reduces the "snow shadow" and promotes sliding.

Gable Roofs

Higher pitch options (e.g. 6:12) are used in heavy snow zones to ensure snow slides off quickly.

Drift Control

We analyze where snow will pile up (drifting) to reinforce specific bays without over-engineering the whole building.

The Process

How We Engineer for Snow

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Steeper Pitch

Increasing roof angle to maximize natural snow shedding and reduce accumulation.

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Heavier Trusses

Using higher-yield steel and larger truss sections for vertical load capacity.

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Reduced Bay Spacing

Placing frames as close as 2 m apart to distribute heavy snow loads.

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Snow Guards

Installing guards to prevent "snow avalanches" where personnel or equipment are present.

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Heating Options

Internal heating and insulation can be used to melt snow and prevent ice damming.

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Drift Analysis

Site-specific modeling of leeward and windward snow accumulation patterns.

Capacity

Snow Load Capacity

Relative snow handling capabilities of different frame/membrane grades.

Standard PVC (610 gsm)

1.2 kPa

Reinforced PVC (750 gsm)

3.5 kPa

Premium PVC (900 gsm)

7.5 kPa

PVDF Industrial (1100–1200 gsm)

10+ kPa

PVDF Maximum (1350–1450 gsm)

12+ kPa

FAQ

Snow Load Questions

We have engineered structures for alpine environments exceeding 7.5 kPa (157 psf). By increasing steel thickness and decreasing frame spacing, we can meet almost any site requirement.

Yes. Codes provide different "shape factors" for arch versus gable roofs. Arch roofs often benefit from a lower snow load coefficient due to their ability to shed snow more easily.

If the building is engineered correctly for your local snow load, manual removal is generally not required. However, for extreme unpredicted storms, monitoring for unbalanced drift is always a best practice.

Ponding occurs when snow melts and water pools in fabric depressions. We prevent this by ensuring high membrane pre-tension and using keder rail systems that keep the fabric taut.

Yes. We provide full engineering packages, including stamped drawings and calculations to NBC Canada, ASCE 7, or Eurocode standards for local permitting.