Tongwei
Ground frame for 30 Tongwei TNC TWMNH-54HD510 panels (3×10)
3 rows of 10 panels, 15.30 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
- 15.30kW
- Steel
- 615.2kg
- Posts
- 14
- Bolts
- 198
- Materials
- 83,832₴
- Yield
- 17,423kWh/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 Tongwei TNC TWMNH-54HD510 panel and the 3 × 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 80×40×2 | C-channel 100×50×2.5 | C-channel 100×50×2.5 |
| Purlins and braces | C-channel 41×41×2.5 | C-channel 60×40×2 | C-channel 60×40×2 |
| Frames | 9 frames, pitch up to 1,400 mm | 7 frames, pitch up to 1,850 mm | 6 frames, pitch up to 2,200 mm |
| Posts | 18 | 14 | 12 |
| Footings (bored concrete) | 18 pcs, Ø400 mm, depth 1,100 mm | 14 pcs, Ø400 mm, depth 1,300 mm | 12 pcs, Ø400 mm, depth 1,500 mm |
| Concrete | 2.74 m³ | 2.52 m³ | 2.49 m³ |
| Tilt | 30° | 30° | 30° |
| Panel bottom / post top | 600 / 2,771 mm | 600 / 2,746 mm | 600 / 2,746 mm |
| Panel field size | 11,660 × 3,922 mm | 11,660 × 3,936 mm | 11,660 × 3,936 mm |
| Row spacing between tables (no shade on 21 December) | 13,290 mm at noon · 14,940 mm ±2 h | 14,730 mm at noon · 17,010 mm ±2 h | 16,140 mm at noon · 19,180 mm ±2 h |
| Steel | 651.5 kg | 615.2 kg | 568.7 kg |
| Bolts | M10 — 160, M8 — 66 | M10 — 132, M8 — 66 | M10 — 118, M8 — 66 |
| Panel clamps | end 12, middle 54 | end 12, middle 54 | end 12, middle 54 |
| Materials | 87,093 UAH | 83,832 UAH | 76,798 UAH |
| With installation and delivery | 126,150 UAH | 123,017 UAH | 116,058 UAH |
| Per 1 kW | 8,245 UAH/kW | 8,040 UAH/kW | 7,585 UAH/kW |
| Yield | 1,266 kWh/kW · 19,376 kWh/year | 1,139 kWh/kW · 17,423 kWh/year | 1,043 kWh/kW · 15,960 kWh/year |
| Strength σ/fy | 49% | 65% | 98% |
| Deflection / (L/200) | 34% | 47% | 84% |
| Rafter strength | 82% | 74% | 95% |
| Post utilisation | 21% | 37% | 47% |
| Utilisation | 91% | 89% | 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.
- 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 80×40×2: span between posts 3 041, cantilever 1 101 mm → strength 82%.Chernihiv: Rafter C-channel 100×50×2.5: span between posts 3 041, cantilever 1 101 mm → strength 95%.
- 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 ≈ 12.1 kN (with γ=1.5) vs ≈ 13.4 kN (concrete weight + soil friction, estimate) → 91%.Cherkasy: Foundation Ø400 × 1 300: 0.163 m³ of concrete per post. Wind uplift on the front post ≈ 14.0 kN (with γ=1.5) vs ≈ 15.8 kN (concrete weight + soil friction, estimate) → 89%.Chernihiv: Foundation Ø400 × 1 500: 0.188 m³ of concrete per post. Wind uplift on the front post ≈ 16.3 kN (with γ=1.5) vs ≈ 18.2 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 2 200 mm, 6 frames. Purlin C-channel 60×40×2: strength 98%, deflection 84% 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 | 2,550 | 7 |
| П2 | Rear post | Tube 60×60×2 | 4,071 | 7 |
| Кр1 | Rafter (inclined beam) | C-channel 100×50×2.5 | 5,243 | 7 |
| Пк1 | Frame strut | C-channel 60×40×2 | 2,228 | 7 |
| Пк2 | Front frame strut | C-channel 60×40×2 | 2,944 | 7 |
| Х1 | Longitudinal brace (cross) | C-channel 60×40×2 | 2,808 | 4 |
| Р1 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 3 |
| Р2 | Purlin (rail) | C-channel 60×40×2 | 6,000 | 3 |
| Р3 | Purlin (rail) | C-channel 60×40×2 | 5,660 | 3 |
| Р4 | Purlin (rail) | C-channel 60×40×2 | 5,660 | 3 |
| — | Bolt M10×80 / M10×25 set · frame and struts / purlins, braces, connectors | — | — | 33 |
| — | Bolt M10×90 set · strut to post — through spacer inserts | — | — | 7 |
| — | Bolt M10×120 set · purlin to rafter | — | — | 42 |
| — | Bolt M10×130 set · post–rafter, strut to post — through spacer inserts | — | — | 35 |
| — | Bolt M10×140 set · strut to rafter — through spacer inserts | — | — | 7 |
| — | Bolt M10×150 set · brace to post — through spacer inserts | — | — | 8 |
| — | End clamp 30 mm | — | — | 12 |
| — | Mid clamp (30–40 mm) | — | — | 54 |
| — | Bolt M8×50 + channel nut | — | — | 66 |
| — | Concrete for 14 posts, Ø400×1300 | — | — | 2.52 m³ |
Profile cutting
39 bars of 6,000 mm, 200.4 m of profile in total.
- Tube 60×60×211 bars
- C-channel 100×50×2.57 bars
- C-channel 60×40×221 bars
Estimated cost
The engine's materials estimate for the median zone (Cherkasy).
- Materials
- 83,832₴
- With installation and delivery
- 123,017₴
- Per 1 kW
- 8,040UAH/kW
The engine's estimate has 25 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, ≈ 17,423 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.