Say you're building a deck in your yard and have to cut a 10-in. thick post in half. How do you do this with a circular saw with just an 8-in. blade? Make matching straight cuts on opposite sides of the timber. Set the thickness guide to just over half the woods width.
Make sure that you have an adequate way to remove dust and fumes from your workshop. If your workshop has two windows that face each other, open one and put a fan that blows outward in the other. If not, an exhaust fan should be installed.