The proposed research focused on the maintenance and structural check of the first all FRP (Fiber reinforced polymer) pultruded construction built in Italy in the 2018. The proposed steps have been mainly in the frame of the joint's efficiency evaluation from the local point of view, and in that of visual inspection from a general point of view. By the way, the joint made by bolts are the more potential weak part in these type of constructions. The construction - all FRP made unless steel bolt - has been the consequence of a specific call and is built in the Iuav University Campus in Venice. The structural check is developed through cyclic in situ analysis of the joint bolted efficiency, specifically by means moment toque value applied evaluation and visual damage detection also considering closed formulas already available both for all FRP bolted joints and similar ones as well as connections made by steel and wood. Bolt monitoring is managed by means of a controlled tightening torque wrench which is used to detect the tightening torque for each bolt in the structure. To calculate the friction coefficient used, it was chosen to use the experimental formula on the determination of the mu. For the research, it was decided to use two different friction coefficients to calculate the tightening of the knots. The final aim of the research is to show the results of the structural controls and discussed in the framework of the general performances foreseen for all FRP structures.