I observed tensions fractures in a rafter (residential) that are aged in appearance as the color of the wood at the interior of the fractures is not clean and distinct relative to the color of the wood at the rafter’s exterior. The disoloration of the interior surface of the cracks is an indication that the cracks are weathered and oxidized. I am trying to "date" the fractures. I have been tasked to determine if the fractures occurred within the past 2 years. I have no known event within the past approximate 2 years to date the fractures to. I understand that factors such as wood species and attic ventilation would play into the rate at which the fractured wood would oxidize but I opine that ultimately it comes down to engineering judgement. Anyone out there have some tips as to determining the age of a fracture? If so, please share.
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