PFIZER BUILDING: JACK IT UP! Repair Analysis

https://struct4u.com/downloads : Xconstruct if you want to play with Built-up sections Can the Pfizer Building structural failure be saved, or does the entire new construction need to be demolished? In this video, we analyze the structural integrity of the Pfizer Building expansion project (16 additional floors built on top of an existing roof structure) after the failure and buckling of critical support columns. We walk through the engineering behind the current temporary shoring system, model the structural forces and unwanted horizontal loads caused by the building sagging, and evaluate the two possible path forwards for repairs: Complete Demolition & Rebuild: Why removing the welded steel frames and concrete decks would mean throwing millions in work directly into the garbage. Hydraulic Jacking & Structural Stabilization: A step-by-step forensic engineering breakdown of how hydraulic jacks, tilting saddles, moment frames, and horizontal ties to neighboring structures could safely lift and restore the building into alignment. In this video, we cover: 00:00 — Introduction: Buckled columns & current shoring situation 00:40 — Reinforced vs. Unreinforced steel columns (3D structural software model) 01:40 — Failure modes: Wide flange (H-beam) buckling vs. square box profiles 02:11 — Why shoring must run continuously all the way to the foundation 02:50 — Differential settlement: Slanted frames and unexpected horizontal forces 04:00 — Option 1: Demolishing welded steel frames vs. Option 2: Hydraulic jacking 05:10 — Hydraulic jacking sequence: Moment frames, tilting saddles, & load distribution 06:18 — Managing horizontal force risks during the lifting procedure 07:20 — Load requirements (8,700 tons) & permanent reinforcement strategy What do you think is the most viable path forward for the developer? Let me know your thoughts in the comments! Subscribe to CIVILDETECTIVE for deep-dive structural analysis, forensic engineering case studies, and real-world failure investigations. #Engineering #ForensicEngineering #StructuralEngineering #PfizerBuilding #CIVILDETECTIVE #SteelStructures #BuildingFailure #Construction