A structural retrofit modifies an existing structure to address a project need, observed condition, changed use, or performance objective.
Definition
A structural retrofit changes an existing structure through strengthening, repair, replacement, or added components to address a project need or performance objective. The work may respond to a changed use, observed condition, or other project requirement. Existing records and site conditions can be incomplete, so investigation and stated assumptions often shape the scope. For a civil engineering firm owner, retrofit proposals can define what records, site access, testing, analysis, and design services are included, along with how unexpected conditions are handled. Firms may distinguish retrofit design from construction observation or field evaluation, depending on the agreement. A retrofit is not routine maintenance, and the term alone does not say that a structure is unsafe or that a particular level of strengthening is required. The work needs project-specific evaluation by qualified professionals using applicable criteria and confirmed conditions.
How owners use it
- Define investigation assumptions, access needs, and included retrofit design services in the proposal.
- Track discovered conditions and scope changes that affect analysis or design.
- For a simple inventory, 2 strengthened beams + 3 replaced connections = 5 retrofit items to include in the scope list.
