1. Typically, 1 segment imbalance (≈3–4 m)
2. Two segments (typically 6-8 meters)
3. Three segments (typically 9-12 meters)
4. No imbalance is permitted

Explanation

Industry practice limits cantilever imbalance to one segment length (typically 3-4 meters) to prevent excessive pier moments and foundation stresses. This maintains structural stability while allowing some construction flexibility for weather delays or segment delivery schedules.

Key Learning Points:
Balanced cantilever construction requires careful sequencing
Pier stability depends on moment equilibrium
Construction tolerances must account for structural safety

Learning Resources:
AASHTO LRFD Bridge Design Specifications (2020), Section 5.14.1.3 - Cantilever construction stability requirements
PCI Bridge Design Manual (2011), Chapter 7 - Balanced cantilever construction sequence and monitoring