A housing for the bath fan can be attached to joists in {HEAD ~ the ceiling} by {TAIL ~ a telescoping brackets} 
A housing for the bath fan can be attached to joists in { HEAD ~ the ceiling } by { TAIL ~ a telescoping brackets }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL