ðə tˈɜːm ɪz jˈuːzd baɪ ˈɑːɹkɪtˌɛkts, stɹˈʌktʃɚɹəl ˌɛndʒɪnˈɪɹz, ænd mᵻkˈænɪkəl ˌɛndʒɪnˈɪɹz tə dɪstˈɪŋktli aɪdˈɛntᵻfˌaɪ bˈɪlt stɹˈʌktʃɚz ðæt ɑːɹ nˌɑːt bˈɪldɪŋz.
The term is used by architects, structural engineers, and mechanical engineers to distinctly identify built structures that are not buildings.