The Grain should run along the longest dimension of any
Version with tray
Open Mesh Floor to suit National Hive
In America they call this a "Screened Bottom Board"
Cut all seven parts to 460 mm length before the forming
22 mm square stock is available from some woodworker's
supply shops. Some other DIY chains have 21 mm square material that
can be used with appropriate adjustments to the joint dimensions and
reducing the entrance block rebate to 2 mm.
I have indicated galvanised 8 mesh 450 mm square, but other
metal screens will suit... providing the mesh is not large enough to
admit bees or wasps.
The under rim should be made first, gluing and screwing the
The mesh should be stapled in each corner and along the
exposed front edge,
then the upper rim parts are added using 38 mm
Csk twinthread woodscrews through the bottom rim into the top parts
so that the heads of the countersunk screws are underneath.
An entrance block of 421 mm
x 21 mm x 21 mm (Thorne's size) will suit the 22 mm timber version or
if 21 mm stock is used the entrance block needs planing down to 20 mm
square to suit.
The version as drawn above is simple to construct. If
petroleum jelly is used on the upper surface of the top rim and
linseed oil is used on the
other wooden parts, (take care that the linseed oil does not block
any of the holes in the mesh panel, as it will dry to a rubbery
A description of how and why these items are used is given by Ken
Hoare in the document
Open Mesh Floors.
Written... Autumn 2000
Revised... 20 February 2002