How much weight can the Noguchi Table hold?

My family likes to stack huge books on our Noguchi Table. A single architecture book can weigh about 30 lbs, and we have six on the table now. Since the stacks are concentrated on the center of the table, I'm concerned if this cause any damage to the table. The glass seemed thick and sturdy, but the weight of the glass is also responsible for holding the wooden structure in place, I'd appreciate some technical specs of how much weight the table can hold, to feel assured. Thank you!