This research work presents a framework for undertaking fire risk assessments of bridge structures (both existing and new) aimed to provide project stakeholders with detailed risk profiles appraising both the frequency and consequence of analysed fire hazards. It also helps with quantification of the likely risk reduction if different mitigation strategies are implemented. The output results serve to inform cost-benefit assessments, assessment as to whether risk to bridge users and bystanders is as low as reasonably practicable, and compliance with regulatory requirements. It can also support prioritisation of investments over time and across portfolios of multiple bridges. The intention is that this framework is used to inform international Clients considering major infrastructure projects in future. This framework is not limited to specific fire hazards, meaning it is equally applicable to assessing small scale fires hazards (e.g. passenger car fire), large scale fires with different escalation regimes (e.g. tanker road tanker fire), or complex fire scenarios involving multiple burning objects (e.g. natural wildfires). It is also analysis inclusive, meaning it can incorporate calculation procedures of varying complexity (e.g. hand calculations adopting technical guidance documents, or numerical intensive analysis utilising finite methods or computational fluid dynamics).