Re: Inside dimensions 8 frame langstroth?
Inside box measurements will varry depending upon mfg of the boxes normally. Particularly the width, the length is standard at 18 3/8". The width will varry from about 11 3/4" to 12 1/2".
For instance Mannlake boxes are 14" wide outside which gives them the 12 1/2" inside. There are other posts about diff mfg's of boxes and their measurements on here.
If you plan to make your own, it would be advisable to make them the same width as any boxes that you will buy later on.
Thomas Bartram - 43 - 8 F langs, 22 Italian & 21 Russian