"Design to the average" — a phrase that can cost a warehouse its roof after the first heavy Almaty snowfall or a föhn wind gust. Almaty is one of the most climatically challenging cities in Kazakhstan for industrial construction: it combines high snow loads, variable mountain winds, intense UV, and above all, 9-point seismicity. Let's look at exactly what needs to be incorporated in a warehouse design in Almaty and the Almaty agglomeration — with specific numbers and calculation examples.
2.5–3.0 kPa
snow load in Almaty
snow zones V–VI per SP RK — one of the highest in Kazakhstan
9 points
seismicity
maximum zone in Kazakhstan — determines the entire building structure
0.38 kPa
wind pressure
wind zone III per SP RK 2.04-101, higher during föhn gusts
up to 600 kg/m²
snow in mountain suburbs
Medeo, Butakovka, foothills — local zones of extreme snow accumulation
Regulatory Framework for Almaty
Climatic and seismic loads on buildings in Almaty are governed by:
- SP RK 2.04-101-2013 "Construction Climatology" — snow and wind load maps
- SN RK 2.03-30-2017 "Construction in Seismic Zones" — the key document for Almaty
- SNiP 2.01.07-85 (adapted in Kazakhstan) — loads and actions
- ST RK EN 1991 (Eurocode 1, adaptation) — for projects with international expert review
Seismicity Takes Priority Over Snow and Wind
Snow Loads in Almaty and Suburbs
Normative Data
Almaty falls in snow zones V–VI per SP RK. Normative ground snow load:
| Zone | Normative load Sg (kPa) | Snow mass (kg/m²) |
|---|---|---|
| V (most of Almaty, industrial zones) | 2.5 | ~255 |
| VI (foothill districts, Alatau district) | 3.0 | ~306 |
| Above 1,000 m (Medeo, Butakovka, Shymbulak) | 3.5–4.0 | ~357–408 |
Design snow load on the roof (for flat/low-pitch roofs):
- Sg = 2.5 kPa × 1.4 (reliability coefficient) = 3.5 kPa — for most Almaty industrial zones
- Sg = 3.0 kPa × 1.4 = 4.2 kPa — for the Alatau district and foothills
Almaty Industrial Zones: Where Warehouses Are Built
| Industrial zone | Snow zone | Design load on flat roof | Notes |
|---|---|---|---|
| Alatau district (DKZ, Shubarkol) | VI | 4.2 kPa | Foothills, heavy snow |
| Turksib district | V | 3.5 kPa | — |
| Almaly, Bostandyk | V | 3.5 kPa | — |
| Nauryzbay, Karasai | V–VI | 3.5–4.2 kPa | Verify by specific address |
| Kaskelen (Karasai district) | V | 3.5 kPa | Active development |
| Talgar, Ile-Alatau foothills | VI | 4.2 kPa | Mountain winds, heavy snow |
Snow Pocket: the Hidden Roof Hazard in Almaty
A snow pocket is a localised snow accumulation in height-transition zones, at parapets, and at skylight ventilators. In Almaty, where snowfall often combines with wind, snow pockets form particularly actively.
Where snow pockets form:
- At internal gutters and flat roof drainage troughs
- At parapets and rooftop structures
- On roofs with height changes (canopies, annex junctions)
- Near rooftop ventilation shafts and equipment
Normative coefficient for a snow pocket at a parapet: μ = 2.0–4.0 — i.e. the load is 2–4× the basic design load. At Sg = 3.0 kPa, the pocket can accumulate 8–12 kPa. That is critically high.
2022 and 2024 Snowfall: a Real Lesson for Almaty
Practical Roofing Recommendations
- Dual-pitch roofs with a 15–20° pitch for Alatau district buildings — snow slides off naturally, load is reduced
- Flat roofs — implement a cleaning protocol when more than 15 cm of wet snow accumulates
- Snow guards on pitched roofs — to prevent sudden snow avalanche onto pedestrian zones
- Emergency drains — for rapid melt situations, to prevent water accumulating on the roof
Wind Loads in Almaty
Normative Wind Pressure
Almaty is in wind zone III per SP RK:
- Normative velocity pressure w₀ = 0.38 kPa
- Design value (with factor 1.4): 0.53 kPa
- Wind speed at normative load: ~25 m/s
This is a moderate wind load. However, Almaty has specific characteristics that need to be considered.
Föhn: a Local Amplifying Factor
Föhn — a warm dry mountain wind — occurs in Almaty several times a year. During a föhn:
- Wind speed reaches 25–35 m/s in gusts
- Wind blows predominantly from the south (from the mountains), which is important for building orientation
- Load on the wall facing the mountains is higher than on the north side
When designing buildings with large sail areas (tall warehouses, wide hangars), we recommend applying an amplified wind coefficient for south and south-east facades.
Effect of Building Height on Wind Load
Wind load increases non-linearly with height (coefficient k(z)):
| Building height | Coefficient k(z) | Design pressure (Almaty) |
|---|---|---|
| Up to 5 m | 0.75 | 0.40 kPa |
| 5–10 m | 1.0 | 0.53 kPa |
| 10–20 m | 1.25 | 0.66 kPa |
| 20–40 m | 1.50 | 0.80 kPa |
For a standard 8–12 m high warehouse, design pressure is 0.53–0.66 kPa. For tall hangars (15–20 m) — up to 0.80 kPa.
Seismicity in Almaty: How It Affects the Warehouse Structure
Why Seismicity Matters More Than Snow
Almaty is in the 8–9-point seismic zone. This governs the primary structure:
- Seismic bracing (horizontal and vertical) — additional stiffening elements
- Reinforced nodes at truss-to-column connections
- Column anchorage to the foundation — bolted connections designed for pull-out
- Envelope structures — panel fastening accounting for seismic displacement
- Special roof fastening — profiled sheet must not detach when the building sways
Design Ground Acceleration for Almaty
Per Kazakhstan seismic zoning maps for Almaty:
- Peak ground acceleration (PGA): 0.4–0.5 g (for 475-year return period)
- Design intensity: 8–9 points on MSK-64
- Soil conditions: significantly affect intensity — soft soils amplify seismic action
For Almaty industrial zones (Alatau, Turksib districts), soil conditions most frequently correspond to category II–III, which requires amplifying factors in the design.
Seismic Micro-Zoning for a Specific Site
Combined Load Action: Load Combinations for Almaty
Standards require checking structures against load combinations. For Almaty warehouses the key combinations are:
| Combination | Loads | Where critical |
|---|---|---|
| Primary 1 | Snow + wind | Roof, rafters |
| Primary 2 | Seismicity + permanent | Load-bearing columns, foundation |
| Special | Seismicity + snow (50%) | Entire building |
| Wind + seismicity | Rarely governing, but checked | End walls |
Important: In seismic design for Almaty buildings, snow load is taken with a factor of 0.5 (half value) — because simultaneous maximum snow and strong earthquake is unlikely, but loading is not zero.
Practical Recommendations for Clients in Almaty
1. Require a Seismic Specification
Before design, commission a seismic specification for the specific site address. Cost: 200,000–500,000 ₸. This allows accurate determination of design intensity and either saves material or ensures the required margin.
2. Specify the Exact Address in the Technical Brief
Snow load varies between Almaty industrial zones: Alatau district (zone VI) vs Bostandyk (zone V) — 20% load difference. This changes rafter cross-sections.
3. Check Design Loads in the Project
The structural section (KR) must contain a load table with specific values — snow, wind, seismicity. If there is no table — the design is incomplete.
4. For Roofs in the Alatau District — Go Dual-Pitch
A 15–20° pitch reduces the design snow load by 1.3–1.5×. Plus snow slides off naturally. For buildings in the foothills this is an important structural choice.
5. Implement a Roof Cleaning Protocol
Especially for flat roofs in the Alatau and Turksib districts. Install a roof load sensor or introduce a visual inspection schedule during snowfalls exceeding 5 cm.
We'll calculate loads for your specific Almaty site
StroyHub engineers know the specifics of all Almaty industrial zones — from the Alatau district to Kaskelen. We produce calculations tied to a specific address, not 'to the average'.
FAQ
Is state expert review required for a warehouse in Almaty$2?
For buildings in a seismic zone (Almaty is 8–9 points), state expert review is mandatory for buildings from 500 m² and any industrial facilities. Exceptions are virtually non-existent.
How does seismicity affect construction cost?
Seismic reinforcement adds 10–20% to the cost of steel structures. But these are mandatory costs — without them the building will not pass expert review and will not receive an operating permit.
What happens if snow load is underestimated in an Almaty project?
At best — roof deformation during an abnormal snowfall. At worst — collapse. In any investigation, the first thing the expert review checks is compliance with normative loads. Administrative and criminal liability for the contractor and client.
What are the advantages of a dual-pitch roof over a flat roof for Almaty?
Dual-pitch roof with 15–25° pitch: snow slides off naturally, snow load reduced by 30–50%, lower risk of snow pocket formation. Downside: slightly more expensive structure (trusses vs flat roof). For the Alatau district — unambiguously recommended.
