E-Z Trail floors are designed lower, lighter, stronger, & longer lasting. The 2 x 8 floor boards and 4 x 8 sills are made of Southern Yellow Pine treated for long life. The special cut sills are 27% stronger than commonly used 6 x 6 sills. The floor is framed all around in steel for added strength and warp prevention. Since there are fewer collection points for residues which cause wood decay, floors will stay cleaner and last longer.