Truss Beam V1

implemented unverified

Flat warren-truss beam (pure recipe): a plate with alternating triangular lightening between two solid chords, plus countersunk end screws. Struts hold their declared thickness by construction and the measured ligament check confirms it — a printable spanning beam that saves most of its plastic.

Built from a real example — orbit to inspect.

Declaration example

A minimal product declaration for this archetype — exposed parameters at their defaults. Validate and build it with forge validate / forge build.

schema: product/v1
id: my_truss_beam
archetype: truss_beam_v1@1

params:
  span: 180mm
  height: 40mm

Parameters

parameter	type	default	range	role
`span`	`length`	`180mm`	`100mm … 240mm`	functional	exposed
`height`	`length`	`40mm`	`24mm … 80mm`	functional	exposed
`thickness`	`length`	`8mm`	`5mm … 14mm`	structural
`corner_r`	`length`	`4mm`	`2mm … 10mm`	aesthetic
`chord`solid band top and bottom	`length`	`8mm`	`5mm … 16mm`	structural
`strut_t`	`length`	`5mm`	`3mm … 10mm`	structural
`panels`	`count`	`5`	`3 … 11`	structural
`screw`	`choice`	`M4`	`M4 \| M5`	assembly
`screw_spacing`	`length`	`expr(span - 24)`	`60mm … expr(span - 20)`	assembly
`min_web`	`length`	`4mm`	`3mm … 10mm`	manufacturing