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I'm thinking that it would be better to strengthen it in some way You likely don't need this to be any stronger than the glue-only joint, if you do it right. Think of the stresses this is put under in use, the joints won't actually have to endure strong forces since the normal forces go straight down the length of the boards to the ground. And as I mention ...


2

The second, by a substantial margin. The claims of strength from purveyors of pocket-screw jigs have been tested by many woodworkers, including numerous pros (e.g. Bob Van Dyke of the Connecticut Valley School of Woodworking), and these tests often confirm that when used for a standard 90° joint between two boards strength can rival or exceed that of mortise-...


1

If you use pocket screws for all the major joints here you don't have to have any particular worries about strength, they are very very strong if everything is done right1. Since this will see exposure to some weather (and the water from watering the plants I guess) be sure to use exterior-rated screws in the pocket holes. How do I prevent it from tipping ...


1

I think a much more common approach would be to make the upper cabinet a stand-alone unit with its own bottom. Then, when you assemble the two units, you'd use short screws driven up through the top of the lower unit. This would have a secondary benefit as well. As you currently envisage it, getting the doors right on the upper unit will be a very, very ...


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