Now that the 49-inch sawhorse assembly is completed, we'll turn our attention to the 47-inch assembly. Because the 49-inch assembly will stack on top of the 47-inch unit, we'll need to construct this one a bit differently.
Notice, in the image above, that the side stringers for this unit are on the inside of the legs, as opposed to the outside on the other sawhorse. Otherwise, this step is the same.
Make a mark 10-inches up each of the four legs, on the inside this time. Square the mark using the Layout Square.
Trim the two cutoffs you retained from the last side stringers to 47-inches in length. Attach them as shown in the image, paying attention to stay on the top of the pencil lines and with the ends of the boards flush with the sides of the legs.