The use of timber in building design presents a variety of benefits including low embodied carbon, high strength-to-weight ratio, and architectural appearance. In roof structures, curved glued-laminated (glulam) timber beams have been used, however, there has been limited experimental testing on curved glulam beams, and questions remain surrounding the distribution of strain (and thus stress) in these members. Past work in this area has focused on the use of finite element analysis to study the behaviour of curved glulam beams under gravity loads, but these findings have not been verified experimentally. This research examines the structural behaviour of curved glulam beams through large-scale experimental testing of two beams under four-point bending. The tested beams include a straight beam to serve as a control, as well as a beam with a radius of curvature of approximately 6560 mm. To provide insight into the distributions of longitudinal strain along the beams, they were instrumented with distributed fibre optic sensors (DFOS). The results from the DFOS are used to compare extreme fibre strains in bending along the length of the beam. Results of the study demonstrate that the curved glulam beam failed in a similar manner, as the straight beam, but with reduced capacity and ductility. The load-carrying capacity of the beams is also compared with CSA O86-19 for curved glulam beams.