Stair Stringer Draft

Stair Stringer Draft is an offline calculator and drafting tool for a single straight stair stringer. Enter floor-to-floor rise, available run, and target tread depth — get practical riser/tread geometry, a true-proportion side view, and a printable vector marking map.

Features:

• Create, search, sort, filter, duplicate, and delete stair projects

• Calculate risers, treads, riser height, fitted tread depth, used/remaining run, stringer length, angle, and 2R+T comfort value

• Scaled side-view canvas with zoom, pan, grid, and step selection

• Autosave to local Room storage with draft recovery after restart

• Export a two-page vector PDF marking map (overview + step schedule)

• Export/import versioned JSON backups via the system file picker

• Metric and imperial units; light, dark, and system themes

• Fully offline — no account, ads, analytics, or internet permission

This is a layout aid, not a structural or code-compliance certificate. Always verify dimensions and local building regulations before cutting material.