Pressure to Sign Off on an Unverified Design Change
You are the engineer of record for a commercial building's structural and MEP design. Two weeks before handover, the client's project manager asks you to approve a site change: a 400 mm diameter chilled-water pipe has been rerouted over a corridor because a duct clash was discovered late. The reroute adds two 90° bends and passes through a beam penetration that was not in the original design. The contractor has already installed it and says the structural check is 'obvious' because the penetration is small. The client PM says the handover date is fixed and asks you to sign the change request today so the certificate can be issued. You have not seen the penetration details or the pipe support calculations.
1. Identify the professional and ethical issues in signing the change request today.
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Signing today would mean certifying work you have not verified. The core issues:
- Competence and diligence - as engineer of record you are responsible for the structural adequacy of the penetration and the support of the rerouted pipe. 'Obvious' is not verification; a beam penetration can affect shear capacity, and the added bends change thrust and support loads.
- Public safety - the corridor is an occupied space; a pipe failure or structural distress is a safety matter, not a scheduling inconvenience.
- Honesty and integrity - signing to meet a handover date misrepresents the state of the design. A certificate implies the work has been checked.
- Scope and authority - if the change is outside your original scope or you lack the information, you must say so rather than absorb the risk silently.
- Record - an unverified approval creates a false record that may mislead the client, authorities, and future owners.
The fixed handover date is a commercial pressure, not a technical justification. The correct position is that the change cannot be certified until the checks are done.
2. Set out a defensible course of action that protects safety and your professional standing while helping the client.
Read the worked answer
- Decline to sign today, in writing - state clearly that approval is withheld pending verification, and why. Put it in an email or formal letter so the record is unambiguous.
- Offer a fast, bounded path - request the penetration details, the pipe support calculations, and the revised routing drawing. Commit to reviewing them within an agreed short period (e.g. 48–72 hours) so the client sees a route to handover.
- Do the checks - verify the beam penetration against the structural design (shear and bending capacity, reinforcement, edge distances) and confirm the pipe supports and thrust restraint for the new bends. If you are not the right person for part of it, bring in the appropriate specialist.
- Escalate if pressed - if the client insists on signature without verification, escalate to your principal or the client's senior management, and note that you will record the instruction. Do not sign under protest as a substitute for refusing.
- Document - keep the change request, your review, and the outcome in the project record. If the change is approved after checks, issue it as a proper revision with the supporting calculations attached.
This protects safety, keeps the client moving, and ensures any certificate you issue is one you can defend.