Datum Points Not Correctly Coordinated
8575 GM Ultium 2 Battery Plant STATEMENT OF PROBLEM 1. Bass Datums were not coordinated correctly/accurately. In turn, system integration was challenging. 2. Avaco did not have the skilled help they needed on site. 3. The schedule was built to construct all of Pancake Line-3, and then, all of Pancake NnD Input …
GM Pontiac Process Utility Holes Over Press Pit
STATEMENT OF PROBLEM Once the press pit steel design was complete, CCC provided the pit framing steel model / 2D drawings to GM to provide to Rotem for their use. Rotem placed approximately 45 openings through the rebar SOD, and provided the 2D process drawing to GM/CCC. This drawing underwent 10 revisions by Rot…
Estimating and VDL Knowledge
Project Phase: Estimating Delivery Method: General Contract-Sub Estimating made the assumption that VDLs were shipped in and never ran off. CCC doubled hours due to this. Manual provided for installation was not used per VDL Expert.
GM Pontiac Blank Receiving Roof Support Steel for HVU-1
STATEMENT OF PROBLEM During design of the building steel, 4 joists in the blank receiving bay were upsized to accommodate the weight of the blank receiving air handling unit (HVU-1; 17000#) in bay 22/23, based on JEG''''s input. Later in the design phase (50% MEP design), the mechanical engineer rotated and moved th…
GM Pontiac Stair Width Clearance Issue
STATEMENT OF PROBLEM The GM process team stated they wanted 36" wide clearance for all metal stairs in a design meeting. When IBI designed the stairs they made the tread 36" wide. However, the inner grab bars which project from the outer guardrail impede on that clearance (only 32" clearance). This was deemed a n…
GM Arlington Assembly Non-Conforming Work Poor Concrete Finish
STATEMENT OF PROBLEM Poor finish on exterior concrete. Exterior concrete batch error. There was clumping or balling of synthetic fibers on the interior slab. Post project review shows poor grading and compaction of sub-grade and excessive fibers protruding from the slab. COURSE OF ACTION Offered GM an e…
GM Pontiac Substation W Equipment Floor Loading Issue
STATEMENT OF PROBLEM CCC received the substation equipment shop drawings from GM late in the project, at end of July. In August CCC worked with GM on the rigging plan for hoisting the new substation equipment into the penthouse. IBI performed a structural analysis of the penthouse framing steel and the hoist beam…
GM Pontiac Fire Alarm Design Review
STATEMENT OF PROBLEM The electrical subcontractor contracted Siemens to perform the fire alarm design. The drawings were submtited and reviewed by IBI and were also reviewed and approved by the city/fire department. However it was identified after the fact that the fire alarm drawings did not include smoke detect…
GM Pontiac Process (Press) Design Drawings coordination with Facility drawings
STATEMENT OF PROBLEM There were several issues to where the 2D press drawings provided by Rotem did not show enough detailed information for proper coordination. These included: 1) the press cable trays in pit 2) The platforms and ladders between the presses. 3) D/B team not having a useable press 3D…
Inefficiencies and lost time due to lack of bolt bin
Project Phase: Project Delivery Method: General Contract-Sub No mobile bolt bin created field inefficiencies and lost time.
