Log grading rules specific to this specie: Fresh logs only; Hard maple stain fast in summer time, make sure to rotate inventorie quik enough.  Heart restriction: 1/3 heart in Prime +, Prime, Select, #1 and 1/2 heart for #2. Tapped maple should be cut 5 feet from ground. 6'-7' are accepted and must be at least 2 faces clear and will be graded as #1 at the best.

Grade Diameter Length Heart restriction
All 8” to 34” 6' to 16' 1/3 coeur #2/btr
1/2 coeur #2 and #3

Hard maple is the most desired specie at Amex. Bigger heart will be downgraded.