A broad space is formed between the rib and a back plate portion of the groove so as to interrupt the flow of rain water running toward {HEAD ~ the interior} of {TAIL ~ building frame} 
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A broad space is formed between the rib and a back plate portion of the groove so as to interrupt the flow of rain water running toward { HEAD ~ the interior } of { TAIL ~ building frame }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL