|Can Clear grade redwood contain knots?|
Two ¾" or equivalent, sound, tight knots are allowed in occasional pieces of Clear grade redwood. As an example, three one-half inch knots are equivalent to two ¾ inch knots. A single larger knot cannot be substituted for the two ¾ inch knots.
for more information on redwood grades view the Adobe Acrobat version of Redwood Grades & Uses