CCC being held to CS1 specification on existing conveyor
Project Phase: Contract Delivery Method: General Contract-Sub Customer wanted to hold CCC to CS1 Specification on existing conveyor (15 years old)
GM Pontiac Mechanical Equipment Control Wiring Design
STATEMENT OF PROBLEM There were significant delays in obtaining control wiring drawings from the mechanical subcontractor for the cooling tower, the ARUs, and the substation W HV units. This led to several delays with the electrical installation of the unit controls as the electrical subcontractor could not do an…
Scrap Steel Value
STATEMENT OF PROBLEM: CCC bid a project and provided an overall deduct from the base bid for the value of the scrap. The value of scrap was based on a quoted market value of approximately 450 USD per gross ton. As the project progressed, the market value of scrap steel dropped to approximately 200 USD a gross ton…
New Cooling Tower Mechanical/Structural Coordination
Statement of Problem: In the design coordination of the cooling tower cells and the steel support platform, there was a disconnect in the 3D model between JEG and IBI with the actual elevation of the cells. Additionally, JEG changed the piping configuration to the basins and this impact was not discussed with the…
Type of Bolted Connections (Channel vs Plates)
8555-02 GM Detroit Factory Zero STATEMENT OF PROBLEM Chassis Mod 1 all of the Mod sections were constructed of 8" channel. The Channels were "Toe Clipped" to an inverted "T" iron, as known the channel has a slanted surface. the supplier did not have the correct type of set-up for the Toe Clip Connection. The supp…
GM Pontiac Establishing an Elevation of Top of Floor - Impact on Process
STATEMENT OF PROBLEM During design, elevations were taken along the existing A-line floor and along the MPS building. These elevations were used to average a finish floor level for the building addition. In original design, two die cart rails ran N-S from the die wash booth to A1-line. However after the construct…
Document Control Lacked by Prime
Project Phase: Procedural Management Delivery Method: General Contractor-Sub Document control lacked by Prime. Data storage, drawing log, punch list, etc....was not available.
Incomplete Drawings
8575 General Motors (GM) Ultium 2 Battery Plant STATEMENT OF PROBLEM 1. Incomplete drawings - Missing dimensions 2. OEM's like to layout based on bolt holes 3. OEM's left/arrived every 3 months - they tried to overturn decisions that had already been made. 4. Lack or coordination between OEM's in different are…
Lesson Learned Civil Design Coordination with Building 3D Design
Statement of Problem - The building was designed and coordinated in 3D, the civil site work was designed in 2D and not part of the 3D master model. This led to poor coordination between the building/site utility connection points, as well as some utilities and equipment pads which were coordinated incorrectly. …
GM Pontiac Scope Definitions
STATEMENT OF PROBLEM For utilities at A-line there were descrepancies between the scope demolition/relocation photos and the final direction. When a scope item calls for a utility at a column to be "secured to column" that does not mean "relocate". COURSE OF ACTION N/A LESSON LEARNED May be be…
