TAD B3.5 R.8 :בנה בי תחתי חדת אחד גשורן וכון‏ : built as a new lower dwelling containing beams and windows
See the entire entry for ˀḥd vb. to hold, take, to catch, to seize

TAD B3.5 R.8 :בי תחתי חדת אחד גשורן וכון‏ : a new lower apartment affixed with beams and windows
See the entire entry for gšūr, gšūrā n.m. beam