Enclosures and housings
CH23 Dining Chair - Exploded Parts
- Bounding box
- 10543.8 × 506.3 × 783.5 mm
- Engine
- Precision B-rep
- Parameters
- 72
- Published
- October 30, 2026
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The prompt
Build a fully parametric CH23 wooden dining chair as named-part precision CAD (CadQuery source + STEP), mm. Rebuildable profiles/lofts/sweeps, not imported mesh facets. Symmetry X=0; Y forward; Z up; floor Z=0. No arms. Evidence: [D] printed drawing, [M] OBJ measurements assuming 10mm/unit, [I] inferred. [D] overall W503 D503 H786, nominal seat height445. [M] mesh envelope W510.06 D502.78 H784.15. Use drawing envelope; normalize measured profiles, preserve differences in notes. Original files aren't attached; use this self-contained brief. Separate parts: 2 front legs; 2 continuous rear legs/back uprights; thin curved backrest; 2 visible backrest joint keys; front/rear upper seat rails; paired upper AND lower side rails on each side; front/rear lower transverse stretchers; woven seat. Mirror pairs. No extra low side rungs. [M] Right leg horizontal section centers (Z:X,Y), before normalization: front 5:237,236;100:234,233;250:228,227;350:224,222;450:220,220;470:221,218. Sections ~28mm wide, depth grows 33 to43; rounded foot, rounded top; total height475. rear 5:208,-186;100:206,-175;250:200,-157;350:197,-142;450:193,-138;550:190,-149;650:186,-174;740:183,-206;top760. Width27; depth34 at100,40 at250,51 at350,43 at450,39 at550/650,32 at740. Smooth continuous curves and tapered rounded sections. Backrest [M]: width510; center vertical bounds647..772; at |X|90:654..774;180:677..779;240:701..783. Top slightly dips centrally, bottom drops strongly centrally; rounded ends. Curves in plan, center rearward. Center plane Y=-224 at Z700, rearward rake17.7deg; normal thickness10. Full depth envelope -251..-136. [I] initial plan radius400, edge rounding2, end rounding12; fit smoothly. Two flush slender cross/key-shaped wooden details near X=±181,Z722, aligned with uprights; concealed joinery unknown. [M] Upper transverse rails: front width453,Y218,Z405..458; rear width401,Y-136,Z389..435. Side rails run between them: lower sections ~23 wide x48 high, center Z385 near Y0; upper member distinct above. Lower transverse stretchers: front center Y224,Z332; rear Y-153,Z290; central sections30 high x17 deep; gently shaped, not round dowels. Seat [M] trapezoid W464 max,D393,Y-155..238; narrower rear, transverse sag. Center top Z420 at Y-100,426 at0,432 at100,437 at200. [I] define front-center top as445 datum; shift seat/support rails and update joints. Use thin6mm curved seat envelope with wraps, NOT112mm solid cushion. Optional parametric woven cords [I] diameter3,pitch6,sag20; natural tan, oak wood. Expose envelope, seat datum, taper/splay, profile stations, back bow/rake/thickness, rail sections/elevations, sag and fillets. Derive mating connections. Validate closed solids, connected joints, four coplanar feet, default envelope and seat datum within1mm; test width+10 and seat height+10 rebuilds. Report approximations.
Parameters
| Name | Value | Range |
|---|---|---|
| Layout Gap | 700 mm | 300 – 1500 |
| Front Leg Height | 475 mm | 400 – 550 |
| Front Leg Width | 28 mm | 20 – 40 |
| Front Leg Depth Bottom | 33 mm | 20 – 50 |
| Front Leg Depth Top | 43 mm | 30 – 60 |
| Front Leg X Bottom | 237 mm | 200 – 280 |
| Front Leg X Top | 220 mm | 180 – 260 |
| Front Leg Y Bottom | 236 mm | 200 – 280 |
| Front Leg Y Top | 218 mm | 180 – 260 |
| Rear Leg Height | 760 mm | 700 – 850 |
| Rear Leg Width | 27 mm | 20 – 40 |
| Rear Leg X Bottom | 208 mm | 170 – 250 |
| Rear Leg X Top | 183 mm | 150 – 230 |
| Rear Leg Y Bottom | -186 mm | -250 – -120 |
| Rear Leg Y Top | -206 mm | -280 – -150 |
| Rear Leg Depth at Z=100 | 34 mm | 20 – 60 |
| Rear Leg Depth at Z=350 | 51 mm | 30 – 80 |
| Rear Leg Depth at Z=740 | 32 mm | 20 – 50 |
| Backrest Width | 510 mm | 450 – 600 |
| Backrest Thickness | 10 mm | 6 – 20 |
| Backrest Plan Radius | 400 mm | 300 – 600 |
| Backrest Rake | 17.7 deg | 0 – 30 |
| Backrest Y Center | -224 mm | -280 – -180 |
| Backrest Bottom Center | 647 mm | 600 – 700 |
| Backrest Top Center | 772 mm | 720 – 820 |
| Backrest Bottom Edge | 710 mm | 650 – 760 |
| Backrest Top Edge | 785 mm | 740 – 830 |
| Backrest Edge Round | 4 mm | 0 – 12 |
| Key X Position | 181 mm | 150 – 220 |
| Key Y Position | -186 mm | -250 – -150 |
| Key Z Position | 722 mm | 680 – 760 |
| Key Width | 10 mm | 5 – 20 |
| Key Depth | 12 mm | 6 – 20 |
| Key Height | 50 mm | 30 – 80 |
| Key Cross Width | 20 mm | 10 – 40 |
| Front Upper Rail Width | 453 mm | 400 – 520 |
| Front Upper Rail Y | 218 mm | 180 – 260 |
| Front Upper Rail Z | 431.5 mm | 400 – 470 |
| Front Upper Rail Height | 53 mm | 40 – 70 |
| Front Upper Rail Depth | 20 mm | 10 – 30 |
| Rear Upper Rail Width | 401 mm | 350 – 450 |
| Rear Upper Rail Y | -136 mm | -180 – -100 |
| Rear Upper Rail Z | 412 mm | 380 – 450 |
| Rear Upper Rail Height | 46 mm | 35 – 60 |
| Rear Upper Rail Depth | 20 mm | 10 – 30 |
| Upper Side Rail X | 200 mm | 170 – 230 |
| Upper Side Rail Width | 23 mm | 15 – 35 |
| Upper Side Rail Height | 28 mm | 15 – 40 |
| Upper Side Rail Z | 444 mm | 420 – 470 |
| Lower Side Rail X | 200 mm | 170 – 230 |
| Lower Side Rail Width | 23 mm | 15 – 35 |
| Lower Side Rail Height | 48 mm | 30 – 70 |
| Lower Side Rail Z | 385 mm | 350 – 420 |
| Lower Side Rail Y Front | 221 mm | 180 – 260 |
| Lower Side Rail Y Rear | -196 mm | -250 – -150 |
| Front Stretcher Length | 436 mm | 380 – 500 |
| Front Stretcher Y | 224 mm | 180 – 260 |
| Front Stretcher Z | 332 mm | 280 – 380 |
| Front Stretcher Height | 30 mm | 20 – 50 |
| Front Stretcher Depth | 17 mm | 10 – 30 |
| Rear Stretcher Length | 365 mm | 320 – 420 |
| Rear Stretcher Y | -153 mm | -200 – -100 |
| Rear Stretcher Z | 290 mm | 240 – 340 |
| Rear Stretcher Height | 30 mm | 20 – 50 |
| Rear Stretcher Depth | 17 mm | 10 – 30 |
| Seat Width | 464 mm | 400 – 550 |
| Seat Rear Width | 380 mm | 300 – 450 |
| Seat Front Y | 238 mm | 200 – 280 |
| Seat Depth | 393 mm | 350 – 450 |
| Seat Datum | 445 mm | 400 – 500 |
| Seat Thickness | 6 mm | 3 – 12 |
| Seat Sag | 25 mm | 10 – 50 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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