Dave Sr. from SWISCO responded:
July 19, 2017
Thanks for contacting us. There are no special brackets needed, the 39-390 should come with everything needed to install. Just take note that when using the 39-390 to replace the old style operator, the positioning of the holes may be different. You need to make sure you have the proper backset when you mount it to the sill. I also recommend our 39-286 handle, I don't think the old one will work.
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