Towronix

Towronix is the go-to construction calculator for residential builders, carpenters, and contractors. Design code-compliant staircases, plan decks from framing to finish, and look up span tables and lumber specs — all in one fast, intuitive app built for the job site.

Stair design starts with your total rise and riser count. Towronix instantly generates a complete cut sheet with a visual stringer diagram and runs a live safety check against residential code thresholds — riser height, tread depth, headroom clearance, and the 2R+T comfort formula. Warnings and critical flags surface problems before you cut a single board, and a one-tap export sends the finished cut sheet straight to your photo library.

Deck planning is just as fast. Build a full deck worksheet in minutes: Towronix sizes joists and beams by species, spacing, and span; calculates posts, footings, and railing layout; and produces a grouped material takeoff list ready to hand to the lumber yard. Whether you're framing a ground-level platform or a multi-level deck with a ledger attachment, Towronix handles every number so you can focus on the build.

The built-in Reference library gives you instant access to joist and beam span tables, nominal vs. actual lumber dimensions, a board-foot calculator, fraction-to-decimal and inch-to-metric converters, and a concrete bag estimator for slabs, tubes, and pads. Save stair and deck calculations to named projects, attach job-site photos, and pull everything back up on your next visit. Supports both imperial and metric units with selectable fraction precision (1/4", 1/8", 1/16").