LONGi
Ground frame for 12 LONGi Hi-MO 5 LR5-72HBD-545M panels (2×6)
2 rows of 6 panels, 6.54 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
- 6.54kW
- Steel
- 258.4kg
- Posts
- 8
- Bolts
- 94
- Materials
- 33,741₴
- Yield
- 7,448kWh/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 × 6 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 | Tube 60×60×2 | Tube 60×60×2 |
| Purlins and braces | C-channel 60×40×2 | C-channel 60×40×2 | C-channel 60×40×2 |
| Frames | 4 frames, pitch up to 2,130 mm | 4 frames, pitch up to 2,130 mm | 5 frames, pitch up to 1,640 mm |
| Posts | 8 | 8 | 10 |
| Footings (bored concrete) | 8 pcs, Ø400 mm, depth 1,100 mm | 8 pcs, Ø350 mm, depth 1,300 mm | 10 pcs, Ø300 mm, depth 1,300 mm |
| Concrete | 1.22 m³ | 1.10 m³ | 1.01 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 2,196 mm | 600 / 2,196 mm | 600 / 2,196 mm |
| Panel field size | 7,038 × 2,945 mm | 7,038 × 2,945 mm | 7,038 × 2,945 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 | 237.7 kg | 258.4 kg | 293.9 kg |
| Bolts | M10 — 66, M8 — 28 | M10 — 66, M8 — 28 | M10 — 76, M8 — 28 |
| Panel clamps | end 8, middle 20 | end 8, middle 20 | end 8, middle 20 |
| Materials | 33,327 UAH | 33,741 UAH | 37,073 UAH |
| With installation and delivery | 50,959 UAH | 51,553 UAH | 54,858 UAH |
| Per 1 kW | 7,792 UAH/kW | 7,883 UAH/kW | 8,388 UAH/kW |
| Yield | 1,266 kWh/kW · 8,282 kWh/year | 1,139 kWh/kW · 7,448 kWh/year | 1,043 kWh/kW · 6,822 kWh/year |
| Strength σ/fy | 71% | 96% | 61% |
| Deflection / (L/200) | 59% | 80% | 39% |
| Rafter strength | 90% | 80% | 66% |
| Post utilisation | 18% | 24% | 20% |
| Utilisation | 99% | 86% | 78% |
| Depth vs frost depth | ok | ok | ok |
| Checks overall | with a caution | with a caution | passes |
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 2 165, cantilever 784 mm → strength 90%.Cherkasy: Rafter Tube 60×60×2: span between posts 2 165, cantilever 784 mm → strength 80%.
- 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 ≈ 13.2 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 99%.Cherkasy: Foundation Ø350 × 1 300: 0.125 m³ of concrete per post. Wind uplift on the front post ≈ 11.5 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 86%.
- 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.Cherkasy: Frame spacing 2 130 mm, 4 frames. Purlin C-channel 60×40×2: strength 96%, deflection 80% of L/200 (snow on panel 977 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 | 2,439 | 4 |
| П2 | Rear post | Tube 60×60×2 | 3,521 | 4 |
| Кр1 | Rafter (inclined beam) | Tube 60×60×2 | 3,732 | 4 |
| Пк1 | Frame strut | C-channel 60×40×2 | 1,739 | 4 |
| Х1 | Longitudinal brace (cross) | C-channel 60×40×2 | 2,653 | 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 | 1,038 | 2 |
| Р4 | Purlin (rail) | C-channel 60×40×2 | 1,038 | 2 |
| — | Bolt M10×140 / M10×80 set · frame and struts / purlins, braces, connectors | — | — | 54 |
| — | Bolt M10×150 set · brace to post, strut to rafter — through spacer inserts | — | — | 12 |
| — | End clamp 35 mm | — | — | 8 |
| — | Mid clamp (30–40 mm) | — | — | 20 |
| — | Bolt M8×55 + channel nut | — | — | 28 |
| — | Concrete for 8 posts, Ø350×1300 | — | — | 1.10 m³ |
Profile cutting
16 bars of 6,000 mm, 84.5 m of profile in total.
- Tube 60×60×28 bars
- C-channel 60×40×28 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 33,741₴
- With installation and delivery
- 51,553₴
- Per 1 kW
- 7,883UAH/kW
Prices are the typical market prices built into the Solispec engine, as of 06.10.2026; no margin, no VAT.
All 20 lines of the engine's estimate, with prices
| Item | Quantity | Price, UAH | Sum, UAH |
|---|---|---|---|
| Tube 60×60×2, stock length 6 000 mm | 8 bar | 210 | 10,080 |
| C-channel 60×40×2, stock length 6 000 mm | 8 bar | 230 | 11,040 |
| C-channel connector (splice plate L 300) | 4 pcs | 90 | 360 |
| Bolt M10×140 cl. 8.8 set — frame, struts | 20 pcs | 22 | 440 |
| Bolt M10×80 cl. 8.8 set — purlins, braces, connectors | 41 pcs | 22 | 902 |
| Bolt M10×150 cl. 8.8 set — strut to rafter, brace to post — through spacer inserts | 12 pcs | 27 | 324 |
| End clamp 35 mm | 8 pcs | 35 | 280 |
| Mid clamp (30–40 mm) | 20 pcs | 32 | 640 |
| Bolt M8×55 A2 + spring channel nut M8 | 31 pcs | 14 | 434 |
| Post base anchor pin (M10 / rebar Ø12) | 8 pcs | 20 | 160 |
| Borehole casing (roofing felt / PVC, 300 mm) | 8 pcs | 60 | 480 |
| Crushed stone 20–40 for the bottom of the boreholes | 0.08 m³ | 900 | 72 |
| Earth electrode: 2 rods Ø16×1.5 m + strip 40×4 | 1 set | 1,500 | 1,500 |
| Wire PV-3 6 mm² green-yellow | 21 m | 35 | 735 |
| Module earthing clip (under the clamp) | 12 pcs | 20 | 240 |
| Cable clip, stainless | 36 pcs | 5 | 180 |
| Zinc paint / cold galvanising spray 400 ml | 1 pcs | 350 | 350 |
| Concrete M200 for posts | 1.10 m³ | 3,800 | 4,180 |
| Rebar Ø10 (4 bars per post) | 48 m | 28 | 1,344 |
| Spacer inserts / packs — pieces of the same profile (from offcuts): 4 × 71 mm, 4 × 70 mm, 4 × 30 mm, 4 × 10 mm | 16 pcs | 0 | 0 |
| Materials | 33,741 | ||
Yield
Yield: 1,139 kWh per 1 kW a year, ≈ 7,448 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.