Repair to a Fire Damaged Building, Case Study

Mild Reinforced Cast-In-Place Concrete Folded Plate Roof Structure
Click here to see the visuals from the KBP Coil Coaters Fire Repair and Shear Strengthening presentation.

 

Coil Coating Manufacturing Facility
Built in 1956
314’ x 188’ Building Footprint (59,032 SQ FT)
Mild Reinforced Cast-In-Place Concrete Folded Plate Roof Structure
Two 85’-0” Longitudinal Spans with 9’-0” Cantilevers
Transverse Columns and Valleys Spaced at 22’-0”
Valley to Ridge Height 8’-8”
Slab Thickness 3 ½”
Grade 40 Reinforcing Steel

Fire Damage
Arson Fire – Fire Sprinkler and Alarm Systems Disabled – Seven Separate Fires Started
Coil Coating Solvents Used as Accelerants
Worst Damage Observed in a Three Valley 66’-0” x 85’-0” Area
Damaged Concrete Exhibited a Buff to Pinkish Color, Surface Crazing, Cracks Aligned with Reinforcing Steel, and Spalls
Core Samples Showed a 25% Deficit in Modulus of Elasticity and Only a Slight Loss in Compressive Strength Relative to Unburned Areas.
Rebound Hammer Tests were Preformed on a Grid to Help Define the Extent of the Damage.