Hi,
 
Can anyone help me out here with a brood frame spacing question.  I've
just got some new Hoffman frames to add to those I bought when taking
over some kit from a retiring Beekeeper and the're different sizes.
 
Some are 35mm (1 3/8") spacing and some are 37mm (1 1/2").  I notice that
12 thin frames fit exactly into a 16 1/2" wide BS National brood chamber,
can you run a National on 12 frames?  I also notice that 11 thicker frames
also come exactly to 16 1/2", surely not a coincidence!!!
 
Where does the dummy board fit into all this, Thorne's sell a 1/2" thick
one, so should I use 4 thin Hoffmans (5 1/2"), 7 thick ones (10 1/2") and
a 1/2" dummy?
 
Also I need to know what to do in a WBC (yes, I've inherited a mixture)
which is only 15 1/8" wide; 3 thin + 7 thick + dummy?
 
Thoroughly confused, Mike Pheysey.
Bristol, 100 miles west of London.
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