Abstract: A blast resistant composite section comprises a base section (1), an intermediate section (2), and a solid, bombardment-inhibiting cover section (3). On a side toward the intermediate section (2) the cover section (3) is provided with depressions which form in each instance a groove (9) whose cross-section widens outward in wedge form. Elastically pivotable projections(8) integrally formed with the intermediate section (2) each engage in a groove (9) and are provided in the region of their free edge with an edge (10) of nose-shaped cross section protruding to one side. In the region of the bottom of each groove (9) a lateral enlargement (11) adapted to the cross section of the edge (10) is provided. Due to this design, the cover section (3) can be non-releasably connected to the intermediate section (2) by forces exterted on the cover in a direction perpendicular to the length of the section.