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