A. Contractor "All‑Risk" Warranty
Contractor warrants it has examined all risks, contingencies, site conditions, buildability and constructability. Contractor relies solely on its own investigation, not Principal‑supplied info (including geotechnical).
AS4000 difference: AS4000 allows latent condition relief and does not include an "entire reliance" disclaimer of this breadth.
Cost implication: Include full contingency for ground conditions, interface risks, design/buildability inefficiencies.
Typically 5–10% uplift depending on project uncertainty.
B. No‑Reliance on Principal Information
All "information documents" at contractor's risk. Geotechnical data is factual only; variation between bores is Contractor risk.
AS4000 difference: AS4000 latent conditions regime provides relief. Quantified cost risk: Unforeseen ground remediation, dewatering, over‑excavation, redesign.
Potential cost exposure: $250k–$2m+ on mid‑size civil projects (~1–10% Contract Sum).
C. Rise and Fall – Mostly Eliminated
Alternative 1 selected: no rise and fall.
Cost exposure example: Labour/material inflation at 4–6% p.a. On $18.75m contract over 2 years → $750k–$1.1m unrecoverable.
↓ 600+ more words continue in the same format…