The Sealant That Saved the Tower
Marcus called the structural engineer, Dr. Patricia Okonkwo. “Pat, why Class 50 on the whole building? The north face sees half the movement.” astm c920 class 25 vs class 50
His phone buzzed. It was Elena, his lead glazing subcontractor. “Marcus, the supplier just shorted us on the sealant. We have enough for the north and east faces, but the south and west… we need to order by noon tomorrow, or we miss the weather window.” The Sealant That Saved the Tower Marcus called
“ASTM C920, Class 50. That’s what the engineer wrote.” Dr. Patricia Okonkwo. “Pat