Longitudinal beam elements: rails or tunnels
Vertical beam elements: pillars, upright members, montants
Transverse beam elements: cross member, ledger (telai ladder frame, ponteggi..)
girder: horizontal main structural member (as in a building or bridge) that supports vertical loads
diagonal member, diagonal bracing: elemento triangolante un quadrilatero di travi
brace: elemento trabeiforme di irrigidimento, sostegno, collegamento
door sills: brancardo
cradle: culla, intelaiatura di sostegno “avvolgente”
anti-roll bar or sway bar: barra antirollio
Structural channel, C-beam, Parallel Flange Channel (PFC), open channel section , profilato con sezione a C. “A note on the dynamical behaviour of uniform beams having open channel section”
propeller shaft tunnel
steering column: piantone sterzo
steering rack, steering box: scatola sterzo
scuttle hoop: curvano
bulkhead: paratia
engine brackets, engine mounts: staffe vano motore
fender: parafango, anche fiancata
front pull hook: gancio di traino
draught connector: attacco gancio di traino
an oblique joint with a strengthening gusset: giunto ad angolo con fazzoletto di rinforzo
luggage compartment, spare wheel compartment: vano bagagli, vano ruota di scorta
dashboard frame body: supporto (traversa) plancia
bonnet, hood: cofano
strut bar, strut brace: barra duomi
firewall : parafiamma, anche semplicemente bulkhead
floor assembly : pianale
subframe: telaietto
rib, stiffening rib: nervatura
bead, stiffening bead: “specie di canale concavo ottenuto nella lamiera mediante stampaggio e destinato a rinforzare la parete su cui è eseguito” (ad. dal Marolli); anche “cordone” (es. di saldatura).
rivet, riveted joint: rivetto, giunto rivettato
bolt, bolted joint: bullone, giunto bullonato
inflection point: punto di flesso
Requests:
centina: centring (provisional support structure, formwork), rib
montante: upright member, mast
mozzo ruota: wheel hub
portamozzo: wheel bearing housing, (solo sterzante, steering knuckle, stub axle carrier)
tirante sterzo: tie rod
Please provide some example usage from scientific or technical literature, extracted e.g. from Google Scholar, Books etc.
Consider also that the quality of the published contributions – and of their English language – is getting worse with the publish or perish practice. British authors are to be preferred, and long-running journals.