The plain side bars and bottom bars are 9 mm thick,
Top bars on simple frames are 11 mm-14 mm thick (whatever is
to hand), cell space sides are 18 mm thick. The bridge plates
either side of the cell space are 2 mm thick (some lollipop sticks
are ideal for this purpose).
All parts are grooved to accept the edge of foundation and the
side bars are drilled for nylon or wire reinforcing.
This type of frame is basically a standard B.S. brood frame
reduced to 178 mm (7") wide with 19 mm lugs instead of
The type illustrated should be glued and screwed using
No 4 x 19 mm Csk Screws and a good quality waterproof wood
The method of construction is not critical... I use a
variety of methods according to what materials are available. For
instance if I have several full size top bars with broken lugs (or new
ones with ugly knots) I re-cut these to suit half width or 1/3rd width
frames and use factory made side bars and standard bottom bars cut in
half using a razor saw so as not to lose too much in the cutting.
This type of frame incorporates the cell space for emergence
of queens produced by grafting or cell cup cage methods.
The twin top bars of this type are best made from waterproof
plywood 9 mm thick (dimensions as plan view in component drawing).
If a large batch is to be made then assembly time can be
reduced and consistency improved by making hardwood components as per
the drawing below left.
The choice of wood is unimportant I have used mahogany from
old furniture... Simply because it was available.
Refer to B.S. Frame Sides for dimensions and layout of wiring holes.
much more to come.
Written... Summer 2000, Revised... 09 Aug 2002