| Existing Roof Specs | |
|---|---|
| Existing Roof | |
| Total Roof Area (sq-ft) | |
| Total Photovoltaic Area (sq-ft) | |
| Mean Roof Height (ft) | |
| Roof Slope | |
| SOLAR PV STRUCTURAL SPECS | |
| Total number of modules | |
| Total roof mounts | |
| Solar PV module | |
| Solar PV Rancking | UNIRAC SD |
| Points of connections per module | |
| Aluminium rails per module | 2 |
| Pourable Sealant | |
| Base Sealant | |
| Wind Load Calculation | |
|---|---|
| Velocity Pressure (ASCE 7-16 (26.10.2)) | |
| Qz= 0.00256 kz Kzt Kd V^2 (lb/sq-ft) | |
| Exposure Category | |
| Kz (Velocity pressure exposure) | |
| Kzt (Topographic factor) | |
| Kd (Wind directionality factor) | |
| V (Wind Speed) | |
| Mean height | |
| Qz (Velocity pressure) | |
| Applying ASD Design Load Factor (0.6) | |
| Design Wind Pressures (ASCE 7-16 (29.4.4)) | |
| p = qh (GCp)(Fe)(Fa) (lb/ sq-ft) (N/ sq-meter) | |
| Effective wind area (ASCE 7-16 (26.2)) | |
| Component | Area (sq-ft) |
| Smaller Solar Array and Racking | |
| Mounts | |
| Array Edge Factor (Fe) (ASCE 7-16 (29.4.4)) | |
| Exposed Array | |
| Non-Exposed Array | |
| Conditions of Array Edge Factor = 1.5 | |
| Distance (d1) from roof edge > 0.5h | Distance (d1) to adjacent array > 4 ft or Distance (d2) to next adjacent panel > 4 ft |
| Solar Array Pressure Equalization factor (Fa) (ASCE 7-16 (29.4.8)) | ||
| Effective Wind Area = 21 sqft | Fa= | 0.62 |
| External Pressure Coefficient (GCp) (ASCE 7-16 Figure 30.3 -2A to 2I) | ||
| Effective Wind Area = 21 sqft | Fa= | 0.62 |
| Solar Array | ||
| Zones | Uplift | Downguard |
| Solar Attachment | ||
| Zones | Uplift | Downguard |
| Total Wind Load (psf) | ||||
|---|---|---|---|---|
| Solar Array | ||||
| Zones | Non-Exposure Array | Exposure Array | ||
| Uplift | Downward | Uplift | Downward | |
| Solar Attachments | ||||
| Zones | Non-Exposure Array | Exposure Array | ||
| Uplift | Downward | Uplift | Downward | |
| Dead Load of the critical row | ||
|---|---|---|
| Components | Weight/Unit | # |
| Solar module | ||
| Micro-Inverters | ||
| Rails | ||
| Mounts | ||
| Total Weight | lbs | |
| Total Area | sq-ft | |
| Dead Load | lbs | |
| Wind Load for Effective Area = 1 sqf | psf | |
| Total Design Load on Mounts | psf | |
| Mounts load calculations | |
| Solar Modules in Critical Row | |
| Total Area | |
| Wind load | psf |
| Total wind load | lbs |
| Total mounts in critical row | |
| Tension Force per mount required | lbs |
| Lag bolt out calculation | |
| Spruce, Pine, Fir | lbs/inch |
| SS lag bolt 5/16 " thread depth | inch |
| Pull out strength per mount (2 lagbolt) | lbs |
| Max. Pull out strength required per bolt | lbs |
| Width of Zones as per ASCE 7-22 Figure 30.3-2A to 2I | |
| Least horizontal dimension | |
| 10% of the least horizontal dimension | |
| Building mean roof height | |
| 40% of the height of building | |
| Selected Zones width | |
| Highest Pressure Zone Selected for Calculations | 1 |
| 0.5h Distance as per ASCE 7-22 | |
| Min. Distance to roof Edge |