The current work proposes a new type of joint between pultruded profiles that does not require drilling, is lightweight and build by additive manufacturing. To accomplish that, a state of art review on pultruded profiles joints was carried, addressing simple bolted joints which have their bolts only subjected to shear, as well as semi-rigid joints. Besides, the use of topology optimization on 3D-printed mechanical components is also addressed. Posteriorly, the basic geometry of the proposed component is defined and its respective numeric model used within the topology optimization, presenting their boundary, load and optimization conditions. In order to experimentally verify the behaviour of the component, moment-rotation tests were carried in three groups, namely, the original geometry group, the simple optimized group and the reinforced optimized group. In the end, it was observed that the defined fibre path is consistent with the stresses acting within the component, regarding the greatest efficiency shown in terms of strength and stiffness per unit mass for the reinforced specimens. The same applies to the optimization and adjusting processes. Furthermore, the use of fibre reinforcement led to a greater repeatability of mechanical response.