Shelf Bracket V1

implemented unverified

Wall shelf bracket (wave R4, strength): a rounded wall plate with two countersunk screws, a TAPERED LOFTED ARM straight out of the wall, and thin web gussets tying the arm root into the plate on both bending sides. The taper (tip smaller than root) is enforced by the Form IR, so the standing print is self-supporting; the arm is probe-verified solid out to its tip.

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_shelf_bracket
archetype: shelf_bracket_v1@1

params:
  arm_len: 150mm

modifiers:
  - id: fillet_soften
    target: plate

Parameters

parameter	type	default	range	role
`plate_l`plate length along the wall (vertical when mounted)	`length`	`120mm`	`70mm … 200mm`	assembly
`plate_w`	`length`	`60mm`	`30mm … 120mm`	assembly
`plate_t`	`length`	`6mm`	`4mm … 12mm`	structural
`corner_r`	`length`	`6mm`	`2mm … 14mm`	aesthetic
`arm_len`shelf reach from the wall	`length`	`150mm`	`50mm … 210mm`	functional	exposed
`arm_root_l`	`length`	`34mm`	`16mm … expr(plate_w - 10)`	structural
`arm_root_w`	`length`	`30mm`	`14mm … expr(plate_l / 2)`	structural
`arm_tip_l`tip must not exceed root — the taper is the print safety	`length`	`22mm`	`10mm … expr(arm_root_l)`	structural
`arm_tip_w`	`length`	`18mm`	`8mm … expr(arm_root_w)`	structural
`gusset_h`	`length`	`26mm`	`10mm … 60mm`	structural
`gusset_len`	`length`	`22mm`	`8mm … 50mm`	structural
`gusset_t`	`length`	`5mm`	`3mm … 10mm`	structural
`screw`	`choice`	`M5`	`M4 \| M5`	assembly
`screw_spacing`screws sit beyond the gussets where a driver reaches	`length`	`expr(arm_root_w + 2 * gusset_len + 30)`	`expr(arm_root_w + 2 * gusset_len + 26) … expr(plate_l - 18)`	assembly
`min_web`	`length`	`4mm`	`3mm … 10mm`	manufacturing