{TAIL ~ Various connectors} which have lengths much shorter than the lengths of {HEAD ~ the beams} are provided for attaching one beam to another 
{ TAIL ~ Various connectors } which have lengths much shorter than the lengths of { HEAD ~ the beams } are provided for attaching one beam to another
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH