StairPlan: Stair Calculatorv1.6.0

What changed

• New featureAdded support for multi-floor, split-level, and basement-to-upper-floor stair calculations
• New featureIndividual Rough Opening calculations for landings marked as floor levels
• UXImproved Rough Opening precision by accounting for tread nosing
• New featureEnhanced Deck Stair Mode to support wraparound and corner decks via multi-flight layouts
• PerformanceImproved stability and error handling for extreme and edge-case inputs

Original release notes

V1.6.0 — Multi-floor stairs & precision update.

 - New: split-level and basement-to-upper-floor stairs — mark any landing as a floor level and get its own Rough Opening calculation
 - Rough Opening sizing now accounts for tread nosing for a more precise result
 - Deck Stair Mode now clearly supports wraparound and corner decks via multi-flight layouts
 - Hardened against extreme and edge-case inputs

 Still 100% offline. No tracking, no accounts, no servers.