Sketch-to-CAD · Precast concrete

Turn Precast Sketches into CAD Shop Drawings

LaunchAI converts precast sketches and marked-up civil plans into CAD drawings. Create shop drawings with structure dimensions, knockouts, hatches and inserts. The drawing is built from the supplied measurements, notes and specifications. Unclear details are flagged for your team to review.

See your sketches converted to CAD See the approval screen

For drafter-estimators, engineering departments and quote desks at precast and site-cast concrete product plants

Bid week. Every site contractor wants your number by Wednesday.

The pile looks like every other bid week. A marked-up civil sheet with six structures circled and "precast?" in red. A photo of a sketch on a tailgate: "8x10x7 ID, 8" walls, 2-24" KO N wall @ 3', H20 lid?, 36" hatch." The engineer's structure table with rims and inverts in decimal feet. An image (faxed, of course) from the electric co-op with their vault number on it, and a voicemail asking for "same as the one you did for us at the school, but deeper."

So you open the AutoCAD template for the closest standard and start stretching. Inside dimensions, wall, base and lid thickness for the load. Knockouts placed from the invert math, sized for the pipe and the boot. Hatch, steps, pick points. Check the piece weight against the crane and the trailer. Then the Excel bid sheet: yards, steel, inserts, hatch, boots, freight. After award it all comes back as a submittal, and after approval as piece tickets for the floor.

The drawing is where the money is lost. A knockout in the wrong wall is a core drill on site and a backcharge. A traffic lid priced as non-traffic is a cracked lid or a lost margin, and a non-traffic box priced as H-20 is a lost bid. If you're not on the contractor's bid sheet Wednesday night, you're not on the job.

What the job looks like today

  1. Read the sketch and the plan

    Work out ID or OD, which wall is north, and what "deeper" means.

  2. Stretch a template

    Dimensions, thicknesses, knockouts and hatch, by hand in AutoCAD.

  3. Do the invert math

    Decimal feet to feet-inches, pipe OD plus boot, again.

  4. Price it

    Yards, steel, inserts, hatch and freight into the bid sheet.

  5. Chase the gaps

    Call the contractor about the lid. He's on a job. Wait.

Where it goes wrong

Concrete is the one material nobody fixes on site

Steel gets welded and wood gets trimmed. A precast piece with a hole in the wrong place gets cored, patched or rejected, and somebody pays for the crane twice.

  • Decimal feet on the plan, feet-inches on the form

    The civil sheet says 7.40 feet rim to invert. Somebody types 7' 4". It's 7' 4-13/16", and the pipe lands 13/16" off the knockout.

  • Knockout to where?

    "24" KO @ 3'" from the floor, but to the invert, the center line or the bottom of the hole? Each one puts the pipe in a different place, and the boot doesn't care which you meant.

  • Grass today, fire lane tomorrow

    The sketch says the vault is in the grass. The site plan shows it next to the drive aisle on the fire lane. That is the difference between a pedestrian lid and H-20, and between winning and losing the bid.

  • ID, OD or "the box"

    "8x10x7" from a contractor usually means inside. From an electrical engineer it might mean the excavation. Draft the wrong one and the cable racks don't fit or the hole is a foot too small.

Why it's still manual

Software hasn't fixed this. Here's why.

Precast plants run serious detailing and production software. It still starts with a drafter reading a sketch and a civil sheet.

  • Your CAD and quoting software

    Waits for someone to type

    AutoCAD templates, Tekla Structures, Revit precast tools and StruSoft IMPACT make the drawing fast once someone has decided the dimensions, the loads and the knockouts. None of them reads a tailgate sketch or a structure table.

  • Generic AI and OCR models

    Confidently wrong

    A chat model turns "#4@12 EW" into "#4012 EW", reads "2-24" KO" as a range, and converts 7.40 feet to 7' 4". It also fills in a lid rating that seems reasonable. Nothing tells you which numbers it guessed.

  • Image-to-CAD converters

    Traces lines, not intent

    Image-to-CAD converters trace the rectangle on the photo. You get a box in a DXF with no wall thickness, no knockouts, no load and no idea that the circle was a 24" pipe.

  • Measuring apps and configurators

    Only if everyone uses them

    Takeoff tools read clean plan sets for quantities. They don't build the structure from your standards, place knockouts from inverts, or notice that the contractor's sketch and the engineer's table disagree.

Written on the paperGeneric OCR / AI modelLaunchAI agent
7.4' deep 7' 4" 7.40 ft = 7' 4-13/16" Civil plans are in decimal feet; the plant builds in feet and inches.
#4@12 EW #4012 EW #4 bars at 12" on center, each way The @ reads as a zero; rebar callouts have their own grammar.
2-24" KO 2 to 24" KO Two 24" knockouts Quantity-dash-size reads like a range to anything outside the trade.

How the agent does it

From sketches to CAD drawings and layouts

LaunchAI converts the sketch and its measurements into CAD geometry, applies your drawing standards and prepares the related order information. Missing dimensions and unclear notes are flagged for your team to review.

AutoCADVLT-810 · Hartley storm vault · quote Agent working · your login · this PC
GeneralDetailsPricingNotes
  • 8' 0" x 10' 0" x 7' 0" ID ← Tailgate sketch
  • 8" walls · 8" base ← Sketch + your H-20 table
  • 8" lid · AASHTO H-20 ← Sketch, low confidence
  • 36" x 36" aluminum ← Sketch, "36" hatch"
  • 2 @ Ø24" · north wall · 3' 0" to C/L ← Sketch + contractor email
  • 4 inserts per piece ← Your 8x10 vault standard
  • STD-VAULT-8x10 rev C ← Closest plant standard
  • Line 4 · vault, lid, hatch, boots ← Your Excel estimate
Saved as draft. Nothing is sent until you approve.Send to review

  1. Reads what came in

    Sketches, marked-up sheets, structure tables and voicemails, with confidence per value.

  2. Applies your standards

    Your vault templates, thickness by load, knockout clearances, pick and shipping limits.

  3. Drafts and prices it

    Opens AutoCAD and your bid sheet and builds the structure the way your best drafter would.

  4. Asks only what it must

    Traffic or not? It drafts the question to the contractor instead of guessing.

  5. You approve

    Confirm the flagged lid rating; the price goes on the bid and the drawing is saved for submittal.

Caught at the desk

Problems caught before the shop floor

Today the order bounces when someone hits save. The agent runs the same checks first, fills what it can from a trusted source, and brings you only the one thing that needs a person.

Today

Convert to order · quote #10482Failed rules 4

Quote incomplete · cannot price or send for submittal

  • Lid load rating not confirmed
  • Knockout reference not set (invert or C/L)
  • Pipe OD and boot type missing
  • Inside or outside dimensions not stated

Verify the following

  • Sketch depth disagrees with structure table

With the agent

Agent checks · before review5/6 passed

  • Inside dimensions agree

    8' x 10' x 7' ID matches the sketch, the email and the C-301 callout.

    Pass

  • Lid load rating unclear

    Written "H20 lid?". Drafted as AASHTO H-20; confirm before pricing the lid, walls and steel.

    Needs you

  • Knockouts fit the wall

    Two 24" knockouts on the north wall clear each other and the corners by your minimum.

    Pass

  • Hatch lands in the box

    36" hatch sits over the cavity, clear of the knockout wall.

    Pass

  • Ships and picks

    Box and lid each under your crane and trailer limits; standard 4-point inserts.

    Pass

  • Built from your standard

    STD-VAULT-8x10 rev C; wall and base thickness from your H-20 table.

    Pass

Human review

You approve the drawing, not the typing

The paperwork on one side, the agent's drawing on the other, and every value it read in between, with the one it's unsure of called out.

LaunchAI Portal · Reviews

Approval you asked for

Approve the Hartley storm vault drawing Pending

The agent drafted the 8x10x7 vault from the contractor's sketch and your standard, placed both knockouts and priced it. The lid load rating is unclear.

Medium risk 1 of 12 in your queue Sketch to CAD · step 02.6 · Review structure drawing

Agent suggests: Approve after confirming the H-20 lid. Inside dimensions, walls, knockouts and hatch match the sketch and your vault standard.

Source sketchIMG_7781.jpg
10' inside7' inside3' to ctr H20 lid? 36" hatch 2-24" KO N wall 8" walls
Utility vault · sectionOpen in AutoCAD
10' 0" ID7' 0" ID3' 0" C/L AASHTO H-20 LID 36" HATCH 2X Ø24" KNOCKOUT 8" WALL TYP Utility vault · section · Rev A ● Preview synced just now

Dimensions read from sketch

  • Inside length“10' inside” 10' 0"
  • Inside width“8x10” 8' 0"
  • Inside height“7' inside” 7' 0"
  • Knockouts“2-24" KO N wall” 2 @ Ø24", north wall
  • Hatch“36" hatch” 36" x 36"
  • Lid ratingLooks like “H20 lid?” AASHTO H-20
Every value links back to where it was read on the sketch. Request changes Approve CAD

Inputs and outputs

Sketches and measure sheets in. CAD drawings out.

  • Contractor sketches and photos of sketches
  • Marked-up civil and electrical plan sheets
  • Engineer structure tables with rims and inverts
  • Utility and DOT standard drawing numbers
  • Phone and email changes during bid week
  • The structure drafted in AutoCAD from your plant standards and title block
  • Knockouts, hatch, steps and pick points placed and dimensioned
  • A priced line in your bid sheet: concrete, steel, inserts, hatch, boots, freight
  • A submittal drawing once the job is awarded
  • Piece tickets for the floor after the submittal is approved

Your numbers

What it gives back to your team

Change the numbers to match your shop.

Example values. Put in your own.

26hours back per week
1,300hours back per year (50 weeks)
0.7full-time people's worth of typing

today with the agent: review only

Your software

Create CAD drawings in your team's tools

LaunchAI converts sketches into drawings through your CAD and design workflow. Bring your software version, drawing standards and a sample sketch so we can confirm the conversion steps and outputs for your setup.

  • AutoCAD
  • Tekla Structures
  • StruSoft IMPACT
  • Revit precast tools
  • Bluebeam
  • Excel bid sheets
  • Your production or ERP system
  • Email, text and fax inbox

FAQ

Precast concrete: questions we hear

Does it do the structural design or stamp anything?

No. It drafts from your standards and your load tables, the way your drafter does. Anything that needs design goes to your engineer or PE, and their review and stamp stay exactly where they are now.

Can it work in AutoCAD with our own templates and title blocks?

Yes. LaunchAI agents use AutoCAD and your bid sheets through the screen with your team's logins, starting from the same templates your drafters use. There's no plug-in or integration to install.

What if the sketch doesn't say traffic or non-traffic?

The agent never picks a load rating on its own. It flags it, checks the site plan for drive aisles and fire lanes, drafts the question to the contractor, and can price both options side by side if you allow that.

Who signs off before anything is poured?

Your people. The agent stops at the drawing and the price. Every flagged value has to be confirmed by your drafter or engineer, and nothing becomes a submittal or a piece ticket without that approval.

Can it read the engineer's structure table in decimal feet?

Yes. It converts rims and inverts to feet and inches, shows both on the drawing, and flags any structure where the contractor's sketch and the engineer's table disagree.

Does it help after award?

Yes. Once the submittal is approved, the same drawing becomes piece tickets for the floor in your format, so nobody retypes the knockouts a third time.

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How the Sketch-to-CAD agent works

Send us last bid week's sketches.

See your precast sketches converted into CAD shop drawings.

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