an inner side wall of {HEAD ~ said U shaped section} provided with {TAIL ~ holes} extending therethrough and positioned to correspond with the plurality of mounting holes in the unitary mounting wall to provide a clearance for the fasteners 
provided with
an inner side wall of { HEAD ~ said U shaped section } provided with { TAIL ~ holes } extending therethrough and positioned to correspond with the plurality of mounting holes in the unitary mounting wall to provide a clearance for the fasteners
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH