No, polyurethane beams are purely decorative and do not provide structural support. If you need structural reinforcement, you’ll need to install appropriate support before adding the beams for aesthetics.
Polyurethane beams are faux wood beams and although they're a brilliant choice, aesthetically, if there's any reason whatsoever that you need them to be structural, they're simply not suitable and you should discuss this with a qualified builder or make contact with our experts for help. However, once the structural side of things is taken care of, then installing urethane beams it's a great and suitable choice to create a stunning room feature.