The bamboo scrimber samples were combusted with three and four sides exposed to fire respectively.After cooling down completely,the compressive strength parallel to the grain of the samples were tested.The results showed that as combustion time increased,the carbonation layer depth and the mass loss rate increased,while the compressive strength parallel to the grain decreased gradually.The bearing capacity of the samples combusted on four sides was lower than that on three sides.The samples maintained the compressive strength of 44 MPa in 45 minutes of combustion time.