Information on baffles at atrium spaces ceiling edge

Does anyone have information on creating a linear recess in the ceiling to substitute for the plastic baffle that you see on the edge of a ceiling at those atrium spaces?
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Why don't you look at the manufacturer's product literature published in the McGraw Hill's Sweet's General Building File? Many have dumped McGraw Hill and their $25,000 annual fee to be published in the Sweet's files but they may still be helpful and at least should be reviewed. Most architectural firms will have a copy of the general building files.
<%= Clinton Gallagher NET csgallagher AT metromilwaukee.com URL http://clintongallagher.metromilwaukee.com / MAP 432'17"N 882'37"W : 432'17"N 882'37"W

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