threading {HEAD ~ an elongated stringer} through said {TAIL ~ at least two transversely spaced apertures} so that a portion of said stringer extends between the opposing sidewalls of said channel member, said stringer being sufficiently long to receive a plurality of said channel members in transversely spaced relation 
through
threading { HEAD ~ an elongated stringer } through said { TAIL ~ at least two transversely spaced apertures } so that a portion of said stringer extends between the opposing sidewalls of said channel member , said stringer being sufficiently long to receive a plurality of said channel members in transversely spaced relation
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH