Culpability: Key Contractor Progress Photos produced during Litigation.
Contractor Progress Photos Depict Concealed Voids located by Contractor, hidden behind an Insulated Concrete Form Product
Contractor sack & patch in same location later discovered and examined during forensic Investigation
Contractor botched their secret repair undertaken without notice to Owner, Engineer or City Inspector
After discovering the true extent of their own defective work, the Prime and its Subcontractors failed to immediately stop work and notify the Owner, the Engineer of Record and the City as to their knowledge of various concealed job problems.
Forensic Analysis showed the Contractor had an isolated $150,000 problem and, by keeping a lid on it, turned it into a $2.5 Million disaster (inc. hard & soft repair costs, exclusive of 5 years of litigation costs, etc.), as their negligent methodology was then replicated again and again in pours throughout their after-progress on concrete construction.
Voids were found to be replete throughout the 3 Story, 22,000 sq. ft., structure designated A2.1 Public, with a max. 800 Person Occupancy, located in a Zone 4 Earthquake District.
Revealed Problem: Dozens of areas of significant daylight seen thru 8” PIP Walls
Revealed Problem: Poor Consolidation & Significant Structural Rock Pockets in virtually every PIP wall
Forensic Plan vs. As-Built & Progress Document analysis showed that Prime & Subcontractors knowingly encountered obvious, patent plan inconsistencies in the building dimensions, and failed to generate RFIs, choosing instead to proceed in error.
As-built dimensional bust -- Contractor mislocated piles/columns in relation to walls when laying out steel & pours, setting Columns 1” to 3” too far south.
Finding a Solution Maintaining Public Safety But Still Mitigating Client Costs The Good
Project Forensic Construction Superintendent commissioned an internal/external construction control survey & layout of the as-built construction
An elevation survey of the Gym Floor was commissioned to develop a remediation plan.
Ground Penetrating Radar & other methods were used in an attempt to locate hidden voids beneath the concrete surface.