A hollow chambered partition extends transversely within the housing between the units and is attached to {HEAD ~ the side walls} and {TAIL ~ top wall} but spaced from the bottom wall 
A hollow chambered partition extends transversely within the housing between the units and is attached to { HEAD ~ the side walls } and { TAIL ~ top wall } but spaced from the bottom wall
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH