Suroso pulled his hand back, his heart racing. A building should not feel fear. It should feel sturdy, grounded, heavy. This one felt like a man on a tightrope.

Still, Suroso went. He brought his old toolkit: a Schmidt hammer for concrete rebound, a cover meter for rebar depth, and a worn brass stethoscope that he had modified to amplify structural frequencies. He arrived at 6 AM, before the security guards switched shifts.

"Thank you for waiting," he whispered. "You can rest now."

Worse, the emergency generator room on B1 had only one working sprinkler. The fire dampers in the air conditioning ducts had been replaced with cardboard painted to look like steel. The 48th floor, which housed the bank's server room, had extra-heavy UPS batteries that the floor slab was never designed to carry. That's why it sang —the steel beams were micro-fracturing every night as they expanded and contracted.

The foundation piles—the long concrete columns that transfer the building's weight to the bedrock—were supposed to be driven 45 meters down into the solid claystone layer. But Suroso's cover meter showed a depth of only 22 meters. Below that? A makeshift raft of crushed limestone and plastic sheets, floating on a pocket of methane gas. The "rotten egg" smell.

"I think the President wants to hear it before the tower collapses during the next earthquake."

Bambang slid a manila envelope across the table. Inside: a letter of transfer to the "Document Archiving Division" in Merauke, Papua. And a check for 500 million rupiah (about $32,000).

He showed them simple things: how to tap a wall and hear the hollow ring of a missing rebar. How to watch for hairline cracks that grew overnight. How to smell the difference between normal concrete dust and the acrid tang of calcined lime—a sign of fire damage.