A moment of 53.3 kip-ft will produce the allowable bending stress of 1,200 psi in the timber while a much larger moment, 697 kip-ft, is needed to produce the 175,000 psi allowable stress in the CFRP. Therefore, the capacity of the timber-CFRP beam is controlled by the stress in the wood.
The addition of a CFRP plate increases the moment capacity of the existing timber beams by 23%, from Mmax = 43.2 kip-ft (for the unreinforced timber beams) to Mmax = 53.3 kip-ft (for the CFRP-reinforced beams).