Re: My TBH and Some Questions.
> I chose that for the bars because it will fit into a standard lang hive. Are my measurements correct for the bars?
Yes, your top bars will fit into a standard Lang body. You can find full dimensions of Lang frames here:
Of course, if your bees do build comb 15" deep, you will have to stack up multiple Lang hive bodies to accommodate that 15".
Whether or not that depth of unsupported comb will stand up to the stresses involved in manipulating combs in a TBH is open to question. You will need to be vigilant to make sure the bees do not make comb bridges between adjacent bars. If they connect two combs together you will probably have a collapse trying to remove the bars.
-- Victor Hugo -- "Common sense is in spite of, not the result of, education.”