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