LONGi
Ground frame for 40 LONGi Hi-MO 5 LR5-72HBD-545M panels (2×20)
2 rows of 20 panels, 21.80 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
- 21.80kW
- Steel
- 724.5kg
- Posts
- 26
- Bolts
- 272
- Materials
- 101,312₴
- Yield
- 24,825kWh/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 LONGi Hi-MO 5 LR5-72HBD-545M panel and the 2 × 20 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 80×40×2 | C-channel 80×40×2 |
| Purlins and braces | C-channel 60×40×2 | C-channel 60×40×2 | C-channel 60×40×2 |
| Frames | 13 frames, pitch up to 1,880 mm | 13 frames, pitch up to 1,880 mm | 13 frames, pitch up to 1,880 mm |
| Posts | 26 | 26 | 26 |
| Footings (bored concrete) | 26 pcs, Ø400 mm, depth 1,100 mm | 26 pcs, Ø300 mm, depth 1,300 mm | 26 pcs, Ø300 mm, depth 1,300 mm |
| Concrete | 3.95 m³ | 2.63 m³ | 2.63 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 2,196 mm | 600 / 2,188 mm | 600 / 2,188 mm |
| Panel field size | 23,180 × 2,945 mm | 23,180 × 2,950 mm | 23,180 × 2,950 mm |
| Row spacing between tables (no shade on 21 December) | 10,170 mm at noon · 11,430 mm ±2 h | 11,270 mm at noon · 13,010 mm ±2 h | 12,350 mm at noon · 14,680 mm ±2 h |
| Steel | 711.7 kg | 724.5 kg | 724.5 kg |
| Bolts | M10 — 188, M8 — 84 | M10 — 188, M8 — 84 | M10 — 188, M8 — 84 |
| Panel clamps | end 8, middle 76 | end 8, middle 76 | end 8, middle 76 |
| Materials | 96,663 UAH | 101,312 UAH | 101,312 UAH |
| With installation and delivery | 151,900 UAH | 156,549 UAH | 156,549 UAH |
| Per 1 kW | 6,968 UAH/kW | 7,181 UAH/kW | 7,181 UAH/kW |
| Yield | 1,266 kWh/kW · 27,608 kWh/year | 1,139 kWh/kW · 24,825 kWh/year | 1,043 kWh/kW · 22,740 kWh/year |
| Strength σ/fy | 55% | 75% | 80% |
| Deflection / (L/200) | 41% | 55% | 59% |
| Rafter strength | 80% | 73% | 79% |
| Post utilisation | 16% | 21% | 23% |
| Utilisation | 87% | 91% | 89% |
| 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.
- 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 ≈ 11.6 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 87%.Cherkasy: Foundation Ø300 × 1 300: 0.092 m³ of concrete per post. Wind uplift on the front post ≈ 10.2 kN (with γ=1.5) vs ≈ 11.2 kN (concrete weight + soil friction, estimate) → 91%.Chernihiv: Foundation Ø300 × 1 300: 0.092 m³ of concrete per post. Wind uplift on the front post ≈ 9.9 kN (with γ=1.5) vs ≈ 11.2 kN (concrete weight + soil friction, estimate) → 89%.
- 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 1 880 mm, 13 frames. Purlin C-channel 60×40×2: strength 80%, deflection 59% 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 | 2,430 | 13 |
| П2 | Rear post | Tube 60×60×2 | 3,513 | 13 |
| Кр1 | Rafter (inclined beam) | C-channel 80×40×2 | 3,732 | 13 |
| Пк1 | Frame strut | C-channel 60×40×2 | 1,732 | 13 |
| Х1 | Longitudinal brace (cross) | C-channel 60×40×2 | 2,447 | 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 | 6,000 | 2 |
| Р6 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 2 |
| Р7 | Purlin (rail) | C-channel 60×40×2 | 5,180 | 2 |
| Р8 | Purlin (rail) | C-channel 60×40×2 | 5,180 | 2 |
| — | Bolt M10×25 set · purlins, braces, connectors | — | — | 50 |
| — | Bolt M10×90 set · strut to post — through spacer inserts | — | — | 13 |
| — | Bolt M10×100 set · purlin to rafter | — | — | 52 |
| — | Bolt M10×130 set · post–rafter — through spacer inserts | — | — | 52 |
| — | Bolt M10×140 set · strut to rafter — through spacer inserts | — | — | 13 |
| — | Bolt M10×150 set · brace to post — through spacer inserts | — | — | 8 |
| — | End clamp 35 mm | — | — | 8 |
| — | Mid clamp (30–40 mm) | — | — | 76 |
| — | Bolt M8×55 + channel nut | — | — | 84 |
| — | Concrete for 26 posts, Ø300×1300 | — | — | 2.63 m³ |
Profile cutting
49 bars of 6,000 mm, 250.8 m of profile in total.
- Tube 60×60×213 bars
- C-channel 80×40×213 bars
- C-channel 60×40×223 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 101,312₴
- With installation and delivery
- 156,549₴
- Per 1 kW
- 7,181UAH/kW
The engine's estimate has 24 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, ≈ 24,825 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.