The restraint assembly 2 wherein the roof arch components have outwardly extending flanges and the flanges of the components are mated to define {HEAD ~ a cavity} between {TAIL ~ the components} 
The restraint assembly 2 wherein the roof arch components have outwardly extending flanges and the flanges of the components are mated to define { HEAD ~ a cavity } between { TAIL ~ the components }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL