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