Learn/Shape Generator/Built-in profiles
Trapezoid Fire Pit
At a glance
- Flat-pattern welded fire pit panels
- Pit plate, feet, ground clearance, and vertical louvers
- Panel sizing for common backyard fire pit builds
The Trapezoid Fire Pit shape (Fabrication category) generates the complete flat-pattern kit for a welded multi-sided fire pit: a polygon pit plate for the ash floor, one trapezoid bowl panel per side, and one trapezoid stand panel per side with feet — all laid out with a configurable part gap, ready to nest and cut. It's a 2D panel layout, not a 3D model: you get exactly the parts you weld.
Layout and openings
Number of sides runs 4–12 (default 5), and every panel count follows it. The three openings — Top opening (default 20 in), Fire pit opening (12 in, where bowl meets stand), and Stand base opening (14 in) — are finished clear inside diameters, measured as the circle that fits inside the assembled polygon. Material thickness (default 1/4 in) offsets the generated panel widths outward so those clear openings survive weld fit-up; enter your actual plate thickness or the pit comes out small. Panel heights are true slant heights computed from Pit height and Stand height plus the taper, so the assembled vertical dimensions land where you asked.
Stand feet
Each stand panel carries a center ground-clearance notch that leaves a foot at each end. Foot width (default 2 in) is measured at the top of the notch, from the sloped outer side to the vertical notch wall, and Foot ground clearance (default 2 in) sets how far the panel's center is lifted off the ground. Clearance must be less than the stand panel height, and the generator checks that the feet actually fit the panel at that height.
Louvers
Louvers are on by default: vertical rounded slots on the HOLES layer of each bowl panel for
draft. Set the count (default 18 per panel), Louver width (3/16 in) and height (1 in), and
Louver height off bottom — measured to the slot center from the bottom edge of the panel.
Louvers spread evenly across each panel while keeping 1 in of clearance from the sloped side
edges; if the requested count won't fit, generation stops with a message instead of running slots
off the edge.
Tips
- The Part gap (default 1/8 in) is layout spacing only — set it to whatever your nesting and lead-ins need.
- Everything imports as ordinary geometry, so you can add a logo cutout or drainage holes to the pit plate after insertion (see editing workflow).