{HEAD ~ Bridges} or webs are typically provided at {TAIL ~ different elevations} to define the cavities, which may be cored 
typically provided at
{ HEAD ~ Bridges } or webs are typically provided at { TAIL ~ different elevations } to define the cavities , which may be cored
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH