Earthquake retrofit at commercial building completed while occupied.

hj3 applying glass fiber on to prepared wall
Before
HJ3 applying carbonseal over glass fiber
During
hj3 applying carbon fiber over column
After

Problem vs solution:

  • Columns required strengthening to resist shear force in north-south direction.
  • The upgrade required overnight work to avoid disturbing tenants.
  • HJ3’s Civil system repaired the columns while the building was still occupied.
  • Columns drilled for carbon fiber dowels, then wrapped with carbon fabric.
  • Shear walls were first wrapped with fiberglass, then with carbon fiber.
  • The installations were painted over to match the building aesthetics.
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