My hives are 17" wide at top, 7 inches wide at bottom, and 48 inches long on the inside. They use between 30-35 topbars depending on how the bars are turned. I cut my topbars 1 1/4" X 1 1/2" so I only have to cut them one size. Then I use a router to cut the comb guide on which ever side I need it. My bees fill up the inside of this hive with comb, and the funny thing is, the more brood nest you have the more honey they produce. My brood nests ranged from 8-10 bars first year, and up to 15 or 16 bars in subsequent years.
Scot Mc Pherson<br />McPherson Family Honey Farms<br />Davenport, IA<br />BeeWiki: <a href=\"http://beewiki.linuxfromscratch.org\" target=\"_blank\">http://beewiki.linuxfromscratch.org</a> <br /><br />Pics:<br /> <a href=\"http://linuxfromscratch.org/~scot/pics/bees/\" target=\"_blank\">http://linuxfromscratch.org/~scot/pics/bees/</a>