Patent ID: 8733044

Claim:
A sectional rail system for constructing a base for plate covering, including an outer rail extending in a first direction and having a U-shaped cross-section, including a sectional back and two screw webs, and an intermediate rail having a C-shaped cross-section, including a sectional back, two screw webs and two inwardly projecting reinforcement webs, the outer rail having a retention means for retaining one of the reinforcement webs when said one of the reinforcement webs is positioned in the retention means, wherein the retention means includes a stop pin, which extends linearly inwards from an inner side of one of the screw webs of the outer rail in a direction orthogonal to said first direction such as to form a stop for said one reinforcement web, and the stop pin further extending into a support flange, which extends in said first direction such as to form a support of said one reinforcement web, wherein the stop pin is fixed to the screw web of the outer rail at the point from which it extends linearly inwards, wherein the stop pin and the support flange form an L-shape, wherein the support flange includes a lock pin for engaging the reinforcement web of the intermediate rail, wherein an additional stop pin is disposed opposite the stop pin, and wherein the lock pin has resilient means for passage of an end part of the intermediate rail, the resilient means of the lock pin extending from and at an angle to the support flange towards the stop pin so as to form a lock and for retention of the end part against the stop pin.