Final answer:
When a wood structural member is charred, it should either be scraped before sealing, removed and replaced, or cleaned using specialized media.
Step-by-step explanation:
When a wood structural member is charred, the severity of the damage will determine the appropriate course of action. If the charring is not severe, the wood can be scraped before sealing to remove the outer layers that are damaged. If the charring is more severe, the wood should be removed and replaced with new wood. In some cases, if the charring is not too severe, cleaning can be done using specialized media such as dry ice blasting or sponge blasting.