by 4s to the length of 22 inches. then you need to cut four 1 by 4's to the length of 6 inches. take a 2 by 4 and then measure it against the 4 by 4. 9 inches should be below the top of the 4 by 4 to hold the 2 by 4 in place and 13 inches should be above. then drill one 2 by 4 to each side. then on top of the 2 by 4 drill the 1 by 4 in place. your rack should look similar to the one in the picture. you need to do this twice, once for each separate rack.
now you 