You could jump on this table and it would not make a sound.  The frame was over-engineered since I occasionally sit on things, such as coffee tables.  The bottom rack is doweled together and offers some storage space.  The granite tiles are not glued in.  They are simply set onto the substrate, which is 5/8" oriented strand.  They can be removed in the event of spill, cracked tile, or if we want to change the color.  There are supports for the top, running the narrow direction, which also have cleats for added support.  The "grout" is black walnut.  The rest of the table is red oak.  The top frame is rabbeted to prevent the edge from breaking off.  One of the pictures shows how only about 3/8" of the frame hangs over the edge of the substrate.