Making accurate perpendicular or angular cuts in thick timbers or odd-shaped posts can be troublesome, particularly when you can't make a complete cut from one side.

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Making accurate perpendicular or angular cuts in thick timbers or odd-shaped posts can be troublesome, particularly when you can't make a complete cut from one side. Often the second cut from the back side doesn't match the first cut.

Make a great cutting guide from two pieces of 1x1x14" hardwood and two 10" lengths of 14 " threaded rod fitted with nuts and washers as shown above. After measuring the distance between your circular-saw blade and the edge of its base plate, clamp the guide in place. Then, cut one side of the stock to a depth just more than half the stock's thickness, flip it over, and cut the opposite side. You can also reposition the guide for angled cuts.
—Tom Xedos, Moreno Valley, Calif.