Como fazer forma de madeira para tijolo caseiro

Useful information: Form size: 20" long x 40" wide x 5.5" high Each brick measures 20" x 10" x 5" x 5" The proportion of the mass is: 4 carts per bag of cement. If desired, you can add 2 cans of gravel for greater rigidity. This proportion yields approximately 220 bricks.