Hoffman Beekeeping Frame Adaptors
This is a simple and inexpensive item, the one I have drawn
is of black plastic, but I have also come across blue ones.
The drawing is larger than life to enable the detail to be
shown. Three things should be noted...
The legs at first sight appear to be different in thickness,
however shrinkage of the centre portion of the rectangular limb during
the moulding process, causes a dip to occur on the face that mates
with the adjacent frame, so the effective thickness of this limb is
the same as the 'V' shaped one at about 5.75 mm.
There is also a small stud amongst the wording, which reduces contact
to a very small area in cases of bad spacing.
Each limb has two partial blind holes that will accept a
The obvious use for these adaptors is in converting straight
sided frames to Hoffman spacing so that they may be used in a 'mix
and match' fashion, as the blue ones depicted at left.
There are other subtle uses for these plastic mouldings.
A sharp chisel easily cuts through the soft plastic to
remove the bridle. The parts that remain can be applied individually
to various items so that they line up with the edges of normal Hoffman
I add the individual pieces to the inside face of the ends
of brood boxes and supers, as right, so that they butt up to the
adjacent side bars of frames. This maintains an adequate gap at each
end of the block of frames. On some occasions I have drilled and
countersunk these parts and used small screws to apply them instead of
using gimp pins.
There are similar adaptor pieces manufactured in beech wood
they are identical in shape to the separated parts of the plastic
version. I have not used any personally, I believe they are available
in Sweden and Denmark.
This other type of plastic adaptor is made of harder
plastic and does the same job, but is applied to the inside or outside
of a 22 mm side bar, depending on whether you can afford to
disrupt the bee space that occurs between the frame end and inside
wall of the hive. If they are fitted inside the frame it avoids
this problem, but renders the fitting of foundation difficult.
Care should be taken, with this type, to ensure that the
triangular edged side is always to the right when looking at the
frame from the lug end. Otherwise they will not mate correctly with
Written... 28 May, 03 June 2002, Revised... 11 November 2002