REC
Ground frame for 20 REC Alpha Pro MG REC610AA Pro MG (HJT, bifacial) panels (2×10)
2 rows of 10 panels, 12.20 kW. The Solispec engine chose the profiles, the frame pitch and the footings for three snow and wind zones: Kherson has the lowest load of the regional centres, Cherkasy the median, Chernihiv the highest.
- Power
- 12.20kW
- Steel
- 431.8kg
- Posts
- 16
- Bolts
- 166
- Materials
- 55,610₴
- Yield
- 13,893kWh/year
Figures for the median zone (Cherkasy); all three zones are in the table below.
Ground frame designer
Open this frame in the builder
The builder opens with the REC Alpha Pro MG REC610AA Pro MG (HJT, bifacial) panel and the 2 × 10 layout; site — Cherkasy. Change the site, the tilt or the profiles and the checks and estimate are recalculated.
- No sign-up
- Snow and wind check
- Drawings and estimate
Three snow and wind zones
The same table designed for three regional centres: with the lowest, the median and the highest combined snow and wind load under DBN V.1.2-2:2006. For another site, open the frame in the builder.
| Parameter | Low loadKherson · S₀ 760 · W₀ 480 | Median loadCherkasy · S₀ 1,520 · W₀ 420 | High loadChernihiv · S₀ 1,720 · W₀ 410 |
|---|---|---|---|
| Posts | Tube 60×60×2 | Tube 60×60×2 | Tube 60×60×2 |
| Rafters | C-channel 60×40×2 | C-channel 60×40×2 | C-channel 80×40×2 |
| Purlins and braces | C-channel 60×40×2 | C-channel 60×40×2 | C-channel 60×40×2 |
| Frames | 7 frames, pitch up to 2,120 mm | 8 frames, pitch up to 1,830 mm | 7 frames, pitch up to 2,120 mm |
| Posts | 14 | 16 | 14 |
| Footings (bored concrete) | 14 pcs, Ø400 mm, depth 1,100 mm | 16 pcs, Ø300 mm, depth 1,100 mm | 14 pcs, Ø300 mm, depth 1,300 mm |
| Concrete | 2.13 m³ | 1.37 m³ | 1.42 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 2,138 mm | 600 / 2,138 mm | 600 / 2,129 mm |
| Panel field size | 13,370 × 2,844 mm | 13,370 × 2,844 mm | 13,370 × 2,849 mm |
| Row spacing between tables (no shade on 21 December) | 9,810 mm at noon · 11,020 mm ±2 h | 10,870 mm at noon · 12,550 mm ±2 h | 11,910 mm at noon · 14,150 mm ±2 h |
| Steel | 400.7 kg | 431.8 kg | 407.6 kg |
| Bolts | M10 — 112, M8 — 44 | M10 — 122, M8 — 44 | M10 — 112, M8 — 44 |
| Panel clamps | end 8, middle 36 | end 8, middle 36 | end 8, middle 36 |
| Materials | 55,091 UAH | 55,610 UAH | 58,029 UAH |
| With installation and delivery | 86,701 UAH | 87,170 UAH | 89,639 UAH |
| Per 1 kW | 7,107 UAH/kW | 7,145 UAH/kW | 7,347 UAH/kW |
| Yield | 1,266 kWh/kW · 15,450 kWh/year | 1,139 kWh/kW · 13,893 kWh/year | 1,043 kWh/kW · 12,726 kWh/year |
| Strength σ/fy | 67% | 68% | 98% |
| Deflection / (L/200) | 56% | 49% | 82% |
| Rafter strength | 84% | 99% | 83% |
| Post utilisation | 16% | 19% | 24% |
| Utilisation | 94% | 100% | 96% |
| Depth vs frost depth | ok | ok | ok |
| Checks overall | with a caution | with a caution | with a caution |
Checks and cautions
Member utilisation as the engine computes it. Cautions are checks that pass, but with a small margin.
- Rafter profileThe rafter is used above 80 %, or the frame's posts stand far apart: the structure passes, but the margin is small.Kherson: Rafter C-channel 60×40×2: span between posts 2 094, cantilever 758 mm → strength 84%.Cherkasy: Rafter C-channel 60×40×2: span between posts 2 094, cantilever 758 mm → strength 99%.Chernihiv: Rafter C-channel 80×40×2: span between posts 2 094, cantilever 758 mm → strength 83%.
- Embedment, mmThe footing resists wind uplift at above 80 % utilisation, or it is shallower than the frost depth. The soil resistance in the calculation is an estimate — check the soil on site.Kherson: Foundation Ø400 × 1 100: 0.138 m³ of concrete per post. Wind uplift on the front post ≈ 12.5 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 94%.Cherkasy: Foundation Ø300 × 1 100: 0.078 m³ of concrete per post. Wind uplift on the front post ≈ 9.4 kN (with γ=1.5) vs ≈ 9.5 kN (concrete weight + soil friction, estimate) → 100%.Chernihiv: Foundation Ø300 × 1 300: 0.092 m³ of concrete per post. Wind uplift on the front post ≈ 10.7 kN (with γ=1.5) vs ≈ 11.2 kN (concrete weight + soil friction, estimate) → 96%.
- Max. frame pitch, mmThe purlins between the frames are used above 80 % (strength or deflection): the structure passes, but the margin is small. A shorter frame pitch or a deeper purlin gives more margin.Chernihiv: Frame spacing 2 120 mm, 7 frames. Purlin C-channel 60×40×2: strength 98%, deflection 82% of L/200 (snow on panel 1 106 Pa).
Bill of materials
The parts of one table for the median zone (Cherkasy): mark, name, profile, cut length, quantity.
| Mark | Part | Profile | Length, mm | Quantity |
|---|---|---|---|---|
| П1 | Front post | Tube 60×60×2 | 2,216 | 8 |
| П2 | Rear post | Tube 60×60×2 | 3,263 | 8 |
| Кр1 | Rafter (inclined beam) | C-channel 60×40×2 | 3,610 | 8 |
| Пк1 | Frame strut | C-channel 60×40×2 | 1,688 | 8 |
| Х1 | Longitudinal brace (cross) | C-channel 60×40×2 | 2,377 | 4 |
| Р1 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 2 |
| Р2 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 2 |
| Р3 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 2 |
| Р4 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 2 |
| Р5 | Purlin (rail) | C-channel 60×40×2 | 1,370 | 2 |
| Р6 | Purlin (rail) | C-channel 60×40×2 | 1,370 | 2 |
| — | Bolt M10×25 set · purlins, braces, connectors | — | — | 34 |
| — | Bolt M10×80 set · purlin to rafter | — | — | 32 |
| — | Bolt M10×90 set · strut to post — through spacer inserts | — | — | 8 |
| — | Bolt M10×130 set · post–rafter — through spacer inserts | — | — | 32 |
| — | Bolt M10×140 set · strut to rafter — through spacer inserts | — | — | 8 |
| — | Bolt M10×150 set · brace to post — through spacer inserts | — | — | 8 |
| — | End clamp 30 mm | — | — | 8 |
| — | Mid clamp (30–40 mm) | — | — | 36 |
| — | Bolt M8×50 + channel nut | — | — | 44 |
| — | Concrete for 16 posts, Ø300×1100 | — | — | 1.37 m³ |
Profile cutting
27 bars of 6,000 mm, 149.2 m of profile in total.
- Tube 60×60×28 bars
- C-channel 60×40×219 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 55,610₴
- With installation and delivery
- 87,170₴
- Per 1 kW
- 7,145UAH/kW
The engine's estimate has 23 lines; the full list is in the builder. Prices are the typical market prices built into the Solispec engine, as of 06.10.2026; no margin, no VAT.
Yield
Yield: 1,139 kWh per 1 kW a year, ≈ 13,893 kWh a year in total (median zone, Cherkasy; tilt 30°, the optimum for the latitude is 35.3°).
A preliminary calculation; a design needs an engineer's check. Snow and wind per DBN V.1.2-2:2006 for the regional centre; profiles, footings and estimate by the Solispec engine 0.12.0.