Method of integrate calculation restricted sash travel for cord hung sash windows
Sash Travel Calculations
MaxSashTravel = OverallSashHeight - SashHeight
Tolerance = 50
MaxLeadTravel = OverallSashHeight - 150 - Tolerance
LeadHeight = SashWeight * (LeadHeight Per Lb / 2)
CalculatedSashTravel = MaxLeadTravel - LeadHeight
Opening % = 100 * (CalculatedSashTravel/MaxSashTravel)
| Lead Height Per Lb | Lead Bar | Sash Thickness |
| 44.7 | 1 1/4" | ... - 38mm |
| 29.7 | 1 1/2" | 39mm - 44mm |
| 22.4 | 1 1/3" | 45mm - 50mm |
| 16.1 | 2" | 51mm - ... |