Ladder truck

Note: Size: a tractor-drawn aerial (tiller) 14.9 m long from the siren on the front bumper to the rear step, 2.5 m wide across the body (3.0 m over the mirrors) and 3.37 m tall at rest to the top of the tiller beacon (tractor cab roof at 2.85 m, bedded ladder at about 2.8 m). That is shorter than a full-size 17–18 m tiller, so it fits a kit station bay. The tyres are 1.04 m across. The tractor has a 3.05 m wheelbase with duals on its rear axle, and the trailer's steering tiller axle sits 8.8 m behind the fifth wheel. The origin is at the bottom centre of the rest footprint, and the tyres rest on y = 0. The front faces +Z. The GLB has 5,520 triangles in 83 meshes, merged per part and per colour. Every material is named exactly after a kit palette colour. 8 of the 12 are used (brick, brick dark, brick light and dark wood are not). The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. The baked clip scene-motion (8 s, seamless) moves only parts on their own pivots. All six wheel sets roll 1 whole turn on their axles. The front wheels sit in kingpin nodes that swivel ±0.1 rad about vertical axes through the wheel centres, and the tiller kingpins counter-steer ±0.12 rad. The ladder lifts up to ladderLift about its heel pin and settles back into its rest. The turntable swings up to about 6.5° only while the ladder is raised. The ram barrel swivels on its foot pin while its rod slides to stay on the ladder eye. The fly section slides out along the base section near the top of the lift. The three beacons spin. The tractor and trailer bodies never move, and the trailer is modelled rigid on its fifth wheel (it does not articulate). The windows are opaque soot black panels with no cab interiors. Params are baked into the GLB at their defaults and only change the model when the scene is rebuilt in the viewer. engineLivery (the kit's 'Engine livery') widens the white bands on the tractor cab, trailer and tiller cab from pinstripes (0) to broad bands (1). From 0.8 up, the cab and tiller roofs turn white. ladderLift sets the peak lift of the loop (0 holds the ladder bedded). flyReach sets how far the fly runs out at the peak. The extension is scaled down below 14° of lift, and it stays nested below 6°, so the fly always clears the tiller cab. compartments sets 3 to 6 roller doors in the long run on each side. Only the default params were rendered and checked; the extremes were not captured. glb-lint: 0 errors and 6 heuristic warnings (83 per-mesh duplicate materials over the direction's 10, non-indexed flat-shaded geometry, deliberately nested trim overlaps, parts flagged 'detached' because each sits in its own group, height against a generic 1 m reference). The lint's lowest point is -0.010 m, a tyre facet in the mid-roll export pose. The lint verdict reads UNVERIFIED only because no host requirements contract was supplied. plan-check passes (one warning: bold_moment) on a copy of the plan with the slug's hyphens removed, because its part-id regex rejects the hyphenated ids this library requires. three-check accepts the real ids, and all 33 survive the GLB reload.