{HEAD ~ A base} 10 of {TAIL ~ the work platform} is supported with a bracket 9 at, at least, three supporting portions 
of
{ HEAD ~ A base } 10 of { TAIL ~ the work platform } is supported with a bracket 9 at , at least , three supporting portions
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH