installation (n.)youdaoicibaDictYouDict[installation 词源字典]
"action of installing," mid-15c., of church offices or other positions, from Medieval Latin installationem (nominative installatio), noun of action from past participle stem of installare (see install). Of machinery, etc., "act of setting up," from 1882.[installation etymology, installation origin, 英语词源]
raising (n.)youdaoicibaDictYouDict
mid-14c., "an act of elevating," verbal noun from raise (v.). Specifically in American English, "the erecting of a building," by 1650s.
RAISING. In New England and the Northern States, the operation or work of setting up the frame of a building. [Webster, 1830]