K Strut Bracing
8555-02 GM Detroit Factory Zero STATEMENT OF PROBLEM With the building not being perfect at 22'6" mid bay and 45' column to column This caused some of the strut bracing to be either too short or too long. ROOT CAUSE We had figured that at some point in time the supplier designed their Mod sections around w…
Misc Steel - Window Elevations Tolerances
Project: 3253 Christman Norcon Perennial Corktown Apartments STATEMENT OF PROBLEM: The Perennial Corktown Apartments is primarily a concrete structure (cast in place). CCC had structural steel and miscellaneous steel spread out throughout the building. Many of our elevations were determined by measurements off of…
Renovation Constraints
Project: 3180 Christman Brinker Ford Michigan Central Station STATEMENT OF PROBLEM: This was a major renovation, which included the demo and replacement of the two main stair towers for the building (13 stories + sub levels) . CCC had a good plan for replacing the stair towers, however, after completing the firs…
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…
Clarification of Building Structural Steel Design Type
Statement of Problem: At bid time GM provided LGR structural reference drawings for their press bay addition. These drawings employed a single-column design concept with a cantilevered bracket to support the crane girders. However, nothing in the RFPS stated that Pontiac had to use a single-column design or copy …
HVAC Equipment Structural Loads
Project Plan: Construction Delivery Method: EPC (Engineer Procure Construct) The weight of the HVAC units and LEF-1 central exhaust unit increased dramatically from 30% design level to IFC. Ultimately some additional steel reinforcing was required for supporting LEF-1 fans. This added cost to the project.
Structural Steel framing Connections
Evaluate with the steel fabricator how the structural engineer has designed the connections. It may save time on installation to change details calling for welds to all bolted and accelerate schedule/save on labor.
Tie-in to Existing Building/Patching
STATEMENT OF PROBLEM: There were several penetrations in various locations that required cutting/coring, weatherproofing, patching, etc. that our subcontractors had excluded in their original estimates. The cutting and patching involved with these tie-ins not specifically shown on the drawings, and was not covered in…
