Rectangular Chute Bend Drawing Package

Assumptions and limits

Read these before you cut anything. They describe exactly what this tool does and does not account for.

• A rectangular chute turning in one plane, made as a segmented bend: two flat side walls (cheeks) and two strips (heel and throat wrappers) brake-formed at each joint, with a straight leg of the same section on each end.
• Sizes are inside sizes. The cheeks stand proud of the wrappers by one plate thickness so the outside fillet weld has a ledge; the wrappers are developed at mid-thickness.
• Each end flange slips over its leg and sits back from the chute end. Bolt holes are spaced equally on each side, no wider than the largest spacing you set.
• Plate thickness, welds, bolts and any liner or wear plate are not sized for load, wear or flow. The set needs review by a licensed professional engineer for the intended use.
• Steel grade and finish are left for the purchaser, and tolerances for purchaser and fabricator to agree; the notes sheet says so.
• No DWG file: the drawing-set DXF opens in AutoCAD and other CAD programs and can be saved as DWG there.

Output is a planning and fabrication aid. You are responsible for verifying dimensions, tolerances and material behaviour before production — full disclaimer.

Worked example

The sample: 600 × 400 mm inside, 90° turn on a 900 mm centreline radius in 5 pieces, 150 mm straight on each end, 6 mm plate, and 10 mm flanges with a 60 mm land and Ø14 holes at most 150 apart.

Its cut files pass all 26 checks of the script (output): for example, each of the four joints turns 22.5°, both cheek legs measure 1050 mm from the intersection point (900 × tan 45° + 150), and the flange opening of 626 × 414 clears the chute's outside of 624 × 412 by 1 mm a side. Total steel: 188.51 kg.