i couldn't find any description of the main tower basement - it all sounds like the main tower slab mat is basically near the ground level. The garage is said t

i couldn't find any description of the main tower basement - it all sounds like the main tower slab mat is basically near the ground level. The garage is said to be under the small tower. There are other SF high-rises using slab, yet their piles reach the bedrock. Also Millenium Tower is reinforced concrete instead of typical for such high-rises steel - it was more "economical" - and due to the leaning/sinking stress the concrete there is cracking.