{HEAD ~ The underside} of the barrier is preferably provided with a number of {TAIL ~ projections} for spacing it away from the upper surface of the shed 
{ HEAD ~ The underside } of the barrier is preferably provided with a number of { TAIL ~ projections } for spacing it away from the upper surface of the shed
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH