{HEAD ~ The total number} of prefabricated braces and posts used in the configuration depends on the size of the channel, the flow modification desired, and {TAIL ~ other considerations} 
{ HEAD ~ The total number } of prefabricated braces and posts used in the configuration depends on the size of the channel , the flow modification desired , and { TAIL ~ other considerations }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL