Regarding Ref Guide (p.291) in tree-lined step-by-step guidance, it says the distance between tree truck to the center of the next tree trunk shouldn't exceed than 50 feet (12 meters). From my understanding 50 feet should be 15 meters right?
Same as Example 1 (p.294) is based on 15 meters maximum in calculation table while it says "No interval between exceeds 50 feet (12 meters)".
I also noticed that CHANGES FROM LEED 2009 it says "In option 1, the tree spacing requirement has been changed from an average 40-feet (12 meters) to a maximum 50-feet (15 meters) interval.
There are many conflicts in Ref Guide. I would like to know which one is a correct number. Would you please declare this issue?