To print out one of these plans:
1) Download the left and right halves.
2) Print each half on 8.5"x11" (or even better 8.5"x14") paper, in landscape mode.
3) Tape the two halves together (after trimming away the excess paper on one of the halves). This will result in plans approximately 8.5"x22" (or 8.5"x28" if legal size paper was used).