Solar Mounting Structural Load Calculator
Calculate wind and snow loads, compare engineer-supplied member actions and deflections, and estimate single-axis tracker torque.
Choose the mounting system
Defaults reproduce the supplied workbook. Environmental loads update from site inputs; advanced member checks use actions and displacements supplied by your structural analysis.
Fixed-tilt inputs
Environmental loads + advanced member checks
Module and layout
Environmental loads
Advanced · Section properties
The workbook’s brace check uses 2.36 cm² directly; it is exposed here as an editable design area.
Advanced · Design actions
Enter design Mx, My and N values from a separate structural analysis. Wind and snow inputs above do not generate these member actions.
Advanced · Analysis deflections
Enter maximum displacements obtained from structural analysis. This tool compares them with the workbook limits; it does not calculate member deflection from the environmental loads.
Fixed-tilt results
Live environmental loads + input-based member comparisons
Distributed loads
Member capacity comparison
Uses the section properties, design actions and design strength entered under Advanced inputs.
| Member | Stress | Utilization | Result |
|---|
Deflection limit comparison
Compares user-supplied analysis displacement with the workbook serviceability limit.
| Member | Limit | Entered | Result |
|---|
Use these preliminary loads as project context, then compare LuminVolt 1P and 2P single-axis tracker systems or request engineering support for a fixed-tilt design.
Tracker inputs
Single-axis torque model
Module and torque tube
Wind cases
Gravity and snow
Tracker results
Torque and environmental loads
Torque breakdown
Environmental values
Compare LuminVolt 1P and 2P tracker systems, pricing factors and project delivery scope, then send the result for a site-specific engineering review.
Engineering reference tables
Reference factors and wind-pressure height coefficients reproduced from the supplied workbook. Load combinations are not automatically applied to the user-entered member actions or displacements.
Load combinations
Strength and deflection combinations
| Check | Combination | Load component | Factor |
|---|---|---|---|
| Strength | 1.2G + 1.4W+ | Gravity | 1.20 |
| Strength | 1.2G + 1.4W+ | Positive wind | 1.40 |
| Strength | G + 1.4W− | Gravity | 1.00 |
| Strength | G + 1.4W− | Leeward wind | 1.40 |
| Strength | 1.2G + 1.4S | Gravity | 1.20 |
| Strength | 1.2G + 1.4S | Snow | 1.40 |
| Deflection | G + W+ | Gravity | 1.00 |
| Deflection | G + W+ | Positive wind | 1.00 |
| Deflection | G + W− | Gravity | 1.00 |
| Deflection | G + W− | Leeward wind | 1.00 |
| Deflection | G + S | Gravity | 1.00 |
| Deflection | G + S | Snow | 1.00 |
Wind pressure height coefficient μz
Coefficient by height and terrain category
| Height (m) | Terrain A | Terrain B | Terrain C | Terrain D |
|---|---|---|---|---|
| 5 | 1.09 | 1.00 | 0.65 | 0.51 |
| 10 | 1.28 | 1.00 | 0.65 | 0.51 |
| 15 | 1.42 | 1.13 | 0.65 | 0.51 |
| 20 | 1.52 | 1.23 | 0.74 | 0.51 |
| 30 | 1.67 | 1.39 | 0.88 | 0.51 |
| 40 | 1.79 | 1.52 | 1.00 | 0.60 |
| 50 | 1.89 | 1.62 | 1.10 | 0.69 |
| 60 | 1.97 | 1.71 | 1.20 | 0.77 |
| 70 | 2.05 | 1.79 | 1.28 | 0.84 |
| 80 | 2.12 | 1.87 | 1.36 | 0.91 |
| 90 | 2.18 | 1.93 | 1.43 | 0.98 |
| 100 | 2.23 | 2.00 | 1.50 | 1.04 |
| 150 | 2.46 | 2.25 | 1.79 | 1.33 |
| 200 | 2.64 | 2.46 | 2.03 | 1.58 |
| 250 | 2.78 | 2.63 | 2.24 | 1.81 |
| 300 | 2.91 | 2.77 | 2.43 | 2.02 |
| 350 | 2.91 | 2.91 | 2.60 | 2.22 |
| 400 | 2.91 | 2.91 | 2.76 | 2.40 |
| 450 | 2.91 | 2.91 | 2.91 | 2.58 |
| 500 | 2.91 | 2.91 | 2.91 | 2.74 |
| ≥550 | 2.91 | 2.91 | 2.91 | 2.91 |
Mono-pitch roof snow coefficient μr
Single-span roof snow distribution by roof slope α
Roof slope α and snow coefficient μr
Select the coefficient corresponding to the mono-pitch roof angle.
Follow the calculator step by step
Learn where each input comes from, which units to use, how to read comparison results, and how the default fixed-tilt and tracker examples work.
Transparent formulas, live results
The environmental-load and tracker-torque chains mirror the supplied workbook. Fixed-tilt member capacity uses design actions entered by the user and should be treated as a separate engineering comparison.
w = 0.5 × ρ × V²
ωk = βz × μs × μz × w0 | sk = μr × s0
σ = N / An + Mx / (γx × Wnx) + My / (γy × Wny)
t = T / L1
Preliminary engineering tool only. A “Within input limit” result is not structural certification and does not prove that environmental loads have been converted into member actions. Confirm site wind, snow, exposure, load combinations, member actions, capacities and applicable codes with a qualified structural engineer before design or construction.