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