Paragraph 2 Gaps in the sleeping surface

Any gap in the sleeping surface of a bunk bed shall be measured by inserting the point of the cone into the gap in such a way that its axis of symmetry is perpendicular to the plane which joins the boundaries of the gap. The cone shall be advanced slowly and steadily further into the gap until an axial force of 100 Newtons is indicated, in which condition the points of contact between the surface of the cone and the boundaries of the gap shall lie on the 75 millimetre line marked round the cone or at a position representing a smaller diameter. The measurement shall be taken in as many places in any such gap as may be necessary to determine the most onerous conditions of dimension and distortion of the boundaries of the gap.