Before you start
- Design inspiration: dimensioned visual reference and editable concept geometry, not a construction plan.
- Use the files to study proportions and possible variations. A physical adaptation needs its own connection, release and installation details.
- The model does not specify structural fasteners, ridge/seam connections or ground anchorage, and it has no established impact or load rating.
- The illustrated panel and frame ridge edges are steep bevels. Their coordinates describe geometry; they are not instructions to exceed a saw or jig operating limit.
- Actual panel stock must be measured: the 95-15/16 in main panels leave only 1/16 in total length allowance on a nominal 96 in sheet.
Dimensions and opening sizes
- LengthIllustrated concept geometry; no use or load rating.
- 120 in
- Base widthIllustrated concept geometry; no use or load rating.
- 24 in
- HeightIllustrated concept geometry; no use or load rating.
- 30 in
Shopping list
| Buy | Material | Stock size |
|---|---|---|
| 5 board | Southern Pine No.2 2 x 4 | 8 ft |
| 3 board | Southern Pine Industrial 45 1 x 6 | 8 ft |
| 1 board | Southern Pine No.2 4 x 4 | 8 ft |
| 3 sheet | PS 1 Exterior plywood with decay protection specified | 3/4 in x 4 ft x 8 ft |
Quantity notes
Indicative full-stock allocation for comparing the illustrated timber concept. This is not a complete purchase order. Hardware, structural connections, coatings, ground anchorage and installation materials are outside this timber takeoff.
- Southern Pine No.2 2 x 4, 8 ft: Two 34 in leg blanks per board. UC4A because feet meet the ground.
- Southern Pine Industrial 45 1 x 6, 8 ft: Six 24 in and six 12 in tie blanks total. UC3B minimum.
- Southern Pine No.2 4 x 4, 8 ft: Two 34 in seam-leg blanks. UC4A ground contact.
- PS 1 Exterior plywood with decay protection specified, 3/4 in x 4 ft x 8 ft: Two main faces and two extensions. Exterior glue alone does not protect against decay.
Tools & equipment
- FreeCAD for editing the native solid model
- STEP-compatible CAD software for exchange geometry
BEFORE YOU BUILD
Use this work at your own risk
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Instructions
01 Read the silhouette
- Start with the 120 x 24 x 30 in outside envelope. The sloping faces create the coop shape; the internal frame is visible in the end view with the skins hidden.
Check: Identify the outer envelope and the separate internal frame.
02 Look inside the frame
- The illustrated frame centers are 3/4, 24, 48, 72, 96 and 119 1/4 in along the length. Five frame pairs use 2 x 4 stock; the wider seam frame uses 4 x 4 stock. These choices describe the model, without establishing strength.
Check: Locate all six frames and the wider frame at 96 in.
03 Follow the panel seam
- Each face combines a 95-15/16 in main panel and a 23-15/16 in extension, with a 1/8 in gap over the wider frame. The stated 32 5/16 in width is the outer sloping face.
Check: The two panels and gap total 120 in on each face.
04 Explore variations in CAD
- Try colors, face treatments or proportions in a copy of the native model. Keep the original as a dimensional reference. A size change also changes panel shapes, frame geometry and material quantities.
Check: Save a separate study copy and identify every dimension changed.