The stiffening members 30 and 32 are each in the form of {TAIL ~ an inverted u shaped channel} having its legs welded to {HEAD ~ the housing top} 
The stiffening members 30 and 32 are each in the form of { TAIL ~ an inverted u shaped channel } having its legs welded to { HEAD ~ the housing top }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD