One empty layer 12-sided of 21 cm high and 70 mm thick of Douglas fir will weigh 3,5 kg. So two layers plus roof will weigh around 10 kg. I don’t know how much the comb will weigh. It will contain per layer a max. of almost 0,5 m2, a total of 1m2 of comb. Plus of course the bees 😀.
Anyway, it...