Compatibility with TOP bee space National equipment is
assured. Compatibility with Standard National Parts can be achieved
either by assembling the parts differently or by adding a 9 mm
x 12 mm rim.
These Items can be assembled for TOP BEE SPACE use or
BOTTOM BEE SPACE as required by the individual.
They were all designed by Dave Cushman whilst he was
proprietor of APEX ENTERPRISES.
And each item offers some benefit over more conventional designs.
Items with black borders are not yet complete.
Never mix this type of equipment with 'Standard National'
equipment as the bee spaces between boxes and frames will be
compromised resulting in extra comb and propolis where you do not want
The "RATIONAL" system detailed here has nothing in
common, apart from Top Bee Space, with the system that was proposed
during the 1970's.
Written... April 2000, Revised... 06 February 2002
Revised 21 May 2002