ฃSince the central part of the panel is pushed downwards by the central load the only contact zonebetween the support and the panel will then be at the inner side of the support. In the post-crackingperiod all transmission of load will then take place over the sharp crack edge zones and the inner sideof the support, thus the counterforce from the support will occur as point loads. Consequently, thepoint-loads (the local stress) in these contact zones will be high. This is illustrated in Fig. 2.2. Eachcrack naturally consists of two crack edges, and for four perpendicular cracks in the panel the load ateach contact-point with the support then will be P/8. For an external load of for instance P=50 kN thismeans that a vertical load of P/8=6.25 kN (~ 640 kg) is transferred over each contact-point.