boards that are cut to the length needed. Bending the pieces with the above method is slightly more
difficult, and they can achieve a neat bend with a little care.
The bending sequence should be well thought out before starting of any bends to avoid interference of
one bend with another. This is all there is to the metal portion of the oven.
Next refer to the sketch titled, Furnace Layout. Two firebricks are left whole, we cut two bricks to 5 2
inches long and we cut one brick exactly in half. You can make all cuts with a thin bladed hacksaw. The
two full-length bricks will be the top and bottom of the oven. The brick cut in half will furnish the two sides
that have the heating element. The 5 2 inch bricks will be the door and the back of the even.
This type of insulating firebrick is very soft and should be handled with care; a fingernail has sufficient
hardness to gouge the brick. For this reason, and its high temperature properties, it was chosen for
making this furnace. This type of insulating brick is normally used in many commercially made ovens.
Several suppliers make this brick, and it can be bought in a suitable grade to withstand various
temperatures. The 2300°F brick is sufficient for this type of furnace, and should be specified as the type