If you are looking to find a way to get those bees out of your honey supers at harvest time, you have a few choices:
# 1 - Just brush them off frame by frame and place the honey frame in a bee tight box as you go. (Bees get very annoyed)
# 2 - Use a fume board and drive them down and out of the honey super. (Stinks, and your spouse will likely be annoyed)
# 3 - Use a bees escape. It requires an extra trip to your hives, but I find it to be the least annoying all around.
There are a few variations of bee escapes on the market such as the porter bee escape.
I prefer these, and have found them relatively easy to build. I will begin with the premise that you have already read the DIY inner cover thread which should help you get to this point.
To build yourself a Triangular Bee Escape, start with this:
The only difference to this point from the inner cover is the thickness of the rim. The Inner Covers are 7/8" thick, make the Bee Escape 1 1/4" thick. Everything else to this point is exactly the same!
This is going to give you a 3/8" rim on the side of your plywood, and this is where the next part will go.
Now, rip yourself some strips of wood 3/8" x 5/8".
Cut your self two sizes of pieces. The first being 8" on the long side and 6" long on the short side. The second being 12 1/2" on the long side and 10" on the short side.
You will need 3 of each size for each escape.
Lay each piece into position as in the picture. Allow enough space at each "outlet" the size of a drone. Then glue and brad them into place. You can fasten these in whatever manner you prefer.
Next, get a piece of # 8 hardware cloth, and cut out a triangular piece that will just cover the strips of wood. I used a staple gun to fasten the cloth.
There you have it, all done! Like anything, if you set yourself up to build one, why not build a few?