During {TAIL ~ loading} of {HEAD ~ the bridge} by traffic, an operational load may be applied to the first component 
During { TAIL ~ loading } of { HEAD ~ the bridge } by traffic , an operational load may be applied to the first component
OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH