An unusually tall top or bottom margin in Word is almost always caused by a master-page element in your FrameMaker document; see §5.1.1 . In Word, the body area must be entirely below the header and above the footer; this means that some FrameMaker layouts cannot be reproduced in Word.
The remedy is to use a FrameMaker conversion template; see §2.4 . The template must include replacement master pages that do not have whatever element is causing the large top or bottom margin. Make sure master pages are imported from the template, with a configuration setting; see §4.6.1 .
> 5 Converting to print RTF > 5.4 Specifying document layout options for print RTF > 5.4.2 Eliminating large top or bottom margins