AI-Proof Instant
Material Takeoffs & Calculators
Zero-signup jobsite calculators engineered for contractors in direct sunlight. Calculate deck boards, joist spans, roof pitch angles, rafter lengths, and editable estimate sheets in under 16ms.
Deck Material & Cost Calculator
Calculate exact deck board quantities, linear footage, framing joists, screws, and total material budget with dynamic waste buffers and real-time 2D blueprint layout.
Roof Pitch, Rafter & Shingle Bundle Calculator
Calculate roof pitch ratio (X:12), slope angle in degrees, slope grade percentage, pitch multiplier, common rafter length, actual sloped square footage, and shingle bundle requirements.
Construction Estimate Template & Contractor Quote Generator
Generate professional, itemized contractor proposals with materials takeoff, labor rates, equipment rentals, profit margins, contingency buffers, and one-click PDF export.
Stair Stringer Rise, Run & Layout Calculator
Calculate deck and home stair dimensions, exact riser height, tread run, stringer board length, number of steps, and IRC safety code compliance in seconds.
Concrete Slab & Bag Calculator
Calculate cubic yards and bags of pre-mix concrete needed for patios, deck footings, sheds, and walkways with sub-base gravel estimates and 10% spillage buffer.
Jobsite Framing & Building Code Reference
Prescriptive span limits, pitch ratios, and safety standards (IRC 2024–2026 / DCA-6)
| Joist Size | Species Grade | 12" O.C. Span | 16" O.C. Span (Standard) | 24" O.C. Span | Max Cantilever | Recommended Use |
|---|---|---|---|---|---|---|
| 2×6 | #2 Southern Pine / Douglas Fir | 9'-11" | 9'-0" | 7'-7" | 1'-3" | Low-profile grade-level ground decks |
| 2×8 | #2 Southern Pine / Douglas Fir | 13'-1" | 11'-10" | 9'-8" | 2'-1" | Standard backyard residential decks up to 14ft projection |
| 2×10 | #2 Southern Pine / Douglas Fir | 16'-2" | 14'-0" | 11'-5" | 2'-10" | Large multi-level decks & composite surface installations |
| 2×12 | #2 Southern Pine / Douglas Fir | 18'-0" | 16'-6" | 13'-6" | 3'-6" | Stair stringers, heavy hot tub zones & commercial framing |