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