A process for the production of a hollow structural column or rod in polymers includes the steps of assembling two or more elongated modules, each one provided with male-female truncated cone-shaped terminal parts. The inner surface of the ‘female’ terminal part has a taper angle that is identical to the taper angle of the outer surface of the ‘male’ terminal part. The process also includes the following steps: aligning the hollow modules; preparing the male and female terminal parts for adhesive bonding and insertion in the terminal part of the adjacent, aligned module; applying, preferably at the ends, an axial compression device, so that on compression of the ends of the rod made up of the modules, each external male tapering surface adheres to and exerts a suitable pressure on the internal female tapering surface of the adjacent module; and curing the adhesive.