Or. Admin. R. 437-007-0805
(1) The minimum distance between mechanical falling machines or personnel must be twice the height of the trees being felled.
NOTE: Increase this distance where the operation of mechanical falling machines creates the possibility of thrown or flying objects.
ORS 654.025(2) & 656.726(4)
ORS 654.001 - 654.295
OSHA 5-2003, f. 6-2-03, cert. ef. 12-1-03