16SPANAI build planner
Sheet A-1 · Decks, sheds, fences, pergolas

Describe it. Build it.

Get the blueprint, the 3D model, a priced materials list and a code check, all from one plan.

You16 × 12 deck off the back door, 28 in above grade. Austin, TX.
Start a planSee the walkthrough
Blueprint3D editorMaterialsCode checkBuild sequence
Project16 × 12 attached deck
SheetA-1
Area · height192 sq ft · 28″ above grade
LocationAustin, TX
How it works

Six views. One prompt.

  1. Step 01 / 06

    Describe it

    Type the project, or attach a photo of a dimensioned sketch.

    Prompt
  2. Step 02 / 06

    Blueprint

    Every joist, beam and post at real dressed lumber sizes. Drag, resize, array, dimension.

    Framing plan
  3. Step 03 / 06

    3D model

    The same boxes, projected. The drawing and the model never drift apart.

    3D · iso
  4. Step 04 / 06

    Materials

    Real products, the cut-list math, editable prices and a live total.

    Materials
  5. Step 05 / 06

    Code & structure

    Spans checked against the IRC tables, with the margin shown.

    Compliance
  6. Step 06 / 06

    Re-check edits

    Changes go back to the model to be checked, not rubber-stamped.

    Edit log

Materials · Home Depot (US)est. prices

132x8 × 12′ PT · joists + side rims$207.74
22x8 × 16′ PT · ledger + front rim$42.96
22x10 × 16′ PT · beam plies$55.96
16x6 × 8′ timber → four 11½″ posts$39.98
295/4x6 × 16′ PT decking$434.13
13Simpson LUS28 joist hangers$25.74
4Simpson ABA66Z post bases$73.88
8Quikrete 80 lb concrete$55.84
+5Ties, LedgerLOK, screws, joist tape$285.71
Total before tax$1,221.94
Decking 144 in ÷ 5.625 in = 25.6 → 26 boards, +10% culls = 29

Code & structure · IRC 2021Austin, TX

Joist span10′-0″ of 12′-3″
2x8 SP #2 @ 16″ o.c. · R507.6Pass
Cantilever2′-0″ of 2′-6″
limit ¼ of back spanPass
Beam between posts5′-2½″ of 7′-11″
2-ply 2x10 · R507.5Pass
Guard trigger28″ of 30″
surface vs 30″ · R312.1Pass
Action Permit: attached decks need one
Verify 10 ft rear setback
Human + AI loop

Checked,
not rubber-stamped.

Move a post, change a span, swap a board. 16Span logs every edit and sends the design back to the model to re-check structure and re-price, with the numbers to show why.

1 edit · Ask AI to re-check & re-price
YouRemove one post. Will the beam still pass?
Beam between posts10′-5″ of 7′-11″
2-ply 2x10 SP #2 · IRC Table R507.5Fails
16SpanNo. Without post 2 the beam spans 10′-5″, and a 2-ply 2x10 allows 7′-11″. Keep all four posts.
16SPAN

Describe a deck, shed, fence or pergola. Get the blueprint, the 3D model, a priced materials list and a code check, all from one plan.

Open the planner