What does a pergola snow-load value mean?
A value in kg/m² describes mass distributed over area; project standards may instead express pressure in kPa or kN/m². For comparison only, 100 kg/m² corresponds to approximately 0.981 kPa under standard gravity. Unit conversion does not determine whether a structure is suitable: the required design value and combinations must come from the applicable local process.
Two reports can show similar headline numbers while testing different spans, roof forms, durations and pass criteria. Always read the table around the number.
What did the JIAKE HR001 snow-load test show?
Intertek Testing Services Shenzhen Ltd., Guangzhou Branch issued report 241225201GZU-001 on January 20, 2025. It identifies one HR001 aluminum alloy louvered pergola sample with a 3 × 3 × 2.5 m specification. The report references EN 1991-1-3:2003+A1:2005 and the client's requirement, with performance determination stated to follow EN 12833.
| Reported item | Value | Interpretation boundary |
|---|---|---|
| Product / model | Aluminum alloy louvered pergola, HR001 | Applies to the reported sample, not every pergola. |
| Sample specification | 3 × 3 × 2.5 m | Drawing shows an approximately 2,690 × 2,930 mm loaded roof area. |
| Nominal snow pressure Pn | 107 kg/m² | Client-defined nominal pressure in the report. |
| Safety pressure Ps | 160 kg/m² | Additional test pressure; not a universal site rating. |
| Nominal-pressure response | 13 mm max deflection; 2 mm permanent deformation | Product operation was recorded as normal. |
| Safety-pressure response | 18 mm max deflection; 2 mm permanent deformation | Sample was recorded as not broken and not exiting the guide rails. |
| Load procedure | Distributed roof pressure, nominal load held for 10 minutes | A controlled test method, not natural snow accumulation. |
Nominal pressure is not the same as safety pressure
The report labels 107 kg/m² as nominal snow pressure Pn and 160 kg/m² as safety pressure Ps. Buyers should preserve those labels. Advertising only the higher value without explaining that it was the safety-test pressure removes critical context and may lead to an incorrect comparison.
For procurement, ask the supplier to state which value is used for normal project selection, which value is a test checkpoint, and what limits apply to deflection, permanent set and continued operation.
Can kg/m² be converted into snow depth?
Not reliably without snow density. Fresh, wind-packed, wet and refrozen snow can have very different mass at the same depth. A depth-only claim therefore gives buyers false confidence. Use the local ground/roof snow requirement expressed through the applicable design process, not a generic centimetre or inch conversion.
Eight factors that can change the required pergola configuration
- Installation location and elevation. Snow conditions can vary sharply within the same country or region.
- Roof area and span. A larger bay can increase member demand and deflection.
- Roof form. Louvered and fixed roofs do not behave identically.
- Drifting and adjacent roofs. Building geometry can create uneven accumulation.
- Post and support layout. Adding, moving or removing supports changes the load path.
- Attached connections. The supporting wall or building structure must accept the transferred load.
- Drainage and freeze-thaw. Gutters and downpipes must remain maintainable during winter conditions.
- Operation and maintenance. Owners need defined snow-clearing and motor-use instructions for the ordered system.
What profile information should be visible?
A useful proposal identifies the complete section set. The supplied JIAKE pergola schedule lists, for example, a 173 medium-duty system with a 150 × 150 × 2.0 mm post, 140 × 161 × 2.0 mm beam and 173 × 45 × 2.0 mm blade. A larger 220 series lists a 150 × 150 × 2.0 mm post, 230 × 150 × 2.5 mm beam and 220 × 53 × 1.8 mm blade.
These dimensions help distinguish configurations, but they are not capacity claims by themselves. Alloy condition, internal geometry, span, joints, fasteners, motorized roof details, anchors and foundation all matter.
Louvered or fixed roof for a snow region?
| Question | Louvered roof | Fixed roof |
|---|---|---|
| Primary benefit | Adjustable light and ventilation | Continuous permanent cover |
| Winter review | Blade, guide, motor and operating limits | Panel/glass system, slope and drainage |
| Snow evidence | Test or calculation for exact configuration | Calculation or documentation for roof build-up and span |
| Maintenance | Clear instructions for snow and moving components | Access, drainage and accumulation management |
The correct choice depends on intended use and available documentation. A fixed roof is not automatically suitable for every snow region, and a louvered roof is not automatically unsuitable. Start from the local requirement and the verified configuration.
What to request before placing an order
- Project location, applicable snow requirement and source.
- Dimensioned plan and elevation of the proposed structure.
- Post, beam and roof-member schedule for the quoted model.
- Attachment, base plate, anchor and foundation assumptions.
- Report or calculation that clearly matches the proposed configuration.
- Winter operation, inspection, clearing and maintenance instructions.
- Separate documentation for the motor and electrical system.
Frequently asked questions
Is 160 kg/m² the rated snow load of every JIAKE pergola?
No. It was the safety pressure recorded for the specific HR001 sample in report 241225201GZU-001. Other models, sizes and installations require review.
Does a passed load test mean there will be no deflection?
No. The report recorded temporary deflection under load and permanent deformation after unloading. Performance criteria should state acceptable limits rather than implying zero movement.
Can I compare snow-load claims from different suppliers directly?
Only after aligning model, dimensions, roof area, pressure type, duration, standard, deformation limits and failure criteria. A headline number without these fields is not an equivalent comparison.
What information is enough for a first review?
Country, city or postcode, approximate width and depth, roof preference, attached or freestanding layout and site photos are enough to begin a preliminary route.
Source record
- Intertek report 241225201GZU-001, dated January 20, 2025: HR001 aluminum alloy louvered pergola, 3 × 3 × 2.5 m, resistance-to-snow-load test.
- JIAKE supplied profile schedule, “Pergola and Sunroom Model Table,” reviewed September 2, 2026.
Request the complete document and confirmation of applicability for a quoted project. This guide is purchasing information, not a local structural design.
Get a free snow-region preliminary recommendation.
Send the location and approximate dimensions. The team will identify the next information needed for a project-specific review.
Request My RecommendationView the snow-region solutionSeptember 2, 2026 — First publication. Added HR001 nominal/safety pressure results, deformation data, profile examples, roof comparison and procurement checklist.