Lay four boards on a flat surface, running parallel to one another and spaced 2 feet apart. Place two boards perpendicularly at the top and bottom of the four boards to form a 6-foot square with two supports in the middle.
Adjust the cut ends of the four boards to rest against the sides of the top and bottom boards. Secure each corner of the square using a corner bracket and screws, and add brackets at all four points where the middle support boards meet the top and bottom boards. Repeat steps 1 and 2 to form a second frame identical to the first.
Lay a piece of cattle panel, also called hog fencing, over each square frame. Align the ends of the paneling with the framework along all four sides. Position a U-shaped nail to straddle the paneling and drive into the frame every foot along the sides and up the supports.
Stack the units one on top of the other with the supports running parallel and the cattle panels on the outsides of the stack. Connect one edge of the frames where the supports begin, using three evenly spaced hinges and screws.
Stand the A-frame unit upright with the hinges facing up and the framework opening out at the ground level. Position the frame over the area where you’ll be planting your cucumbers with the two base edges spaced at least 3 feet apart.