Originally Posted by
rcoodyar15
He is exactly right. If it were me I would decide the height of the bench and the intermediate framing for the legs. Take a 4' level and some 3" lags and fasten the 2X6's to the wall. Then take 2 1/2" deck screws and put the other 3 sides of the frame together. Use temporary 2X4 legs, make sure you don't put them in the corners where the 4x4's go and attach the 3 sided framing to the 2X6's on the wall. You should be able to measure your temporary legs and get them pretty close but this is the time to use the 4' level to make sure your framing is level especially the top. Once you have it fastened off all you need to do is temporarily secure the 4x4's where they go and then take a piece of plywood or a piece of 2X4 lay it on the floor along the slope and put a line on both of the sloped sides. that is your angle. Now you have to cut the 4X4 along that line. Realize a skilsaw won't cut all the way through a 4X4. You have to cut from both sides. That is when you will see just how skilled you are. Do the 2 cuts line up? From there all you have to do is put the 4X4's in the corners and secured them with the decking screws. Cut the tops of the 4x4's off flush with the framing and install your top. Done and secure. If you make a shelf on the intermediate framing it will stiffen it up all the more.