If you stand on the downhill side, the cut-off log may roll toward you. 4. Felling trees: (1) Undercut (q as shown in Fig. 12): Make undercut facing direction which you want tree to fall. Depth of undercut should be 1/3 of tree’s diameter. Never fell trees without proper undercut. (2) Backcut (w as shown in Fig. 12): Make backcut about 5 cm above and parallel to the horizontal undercut. If the chain is bound during cutting, stop the saw and use wedges to free form it. Do not cut through the tree