While an evergreen is still standing, a lot of us can identify which species it is by their types of bark, needles, branches and coloring. So lets just say you had a bunch of softwoods cut down because you are building a new barn, and now the logs are all grouped together and your builder wants only the hemlock logs to be milled into posts and beams…how do you know which logs to pick? Use this trick: If the saw logs have been piled up for more than a day, the pine and spruce logs will have a clear or milky but certainly a very sticky sap ring on the ends. The hemlock, however, does not have a sticky sap like most of the other evergreens, making it easier to distinguish for separating from the other saw logs. Hemlock is used for the beams, as it has great tensile strength and excellent bug resistance, especially when it comes to carpenter bees.