NP 45: Values C_Rd,c, vmin and k1, which are used in state may be found in national annex.

Recommended value for C_Rd,c is 0,18 / g_c, for v_min is defined by formuls(6.3N) and for k₁ is 0,15.

NP 47: Limit values cot q, which are used in state may be found in national annex. Recommended limitations are defined by formula 1 < cotq q < 2,5.

Coefficient a_I (equation 6.4):

• a_I = l_x/l_pt2 < 1,0 for the prestressed reinforcement


• a_I = 1,0 for other kinds of prestressing;