  Exact calculations of the radiative corrections to the single spin asymmetry
in the exclusive pion electroproduction below $\Delta(1232)$ resonance are
performed by employing the EXCLURAD code. The analysis of the dependence of the
obtained results on $W$, $\theta\_{\rm cm}$ and $\phi$ shows that absolute
values of radiative corrections do not exceed 1.5 %. The procedure of sampling
the radiative corrections with analytical functions has been developed allowing
for flexible and rapid applications of the corrections in the data analysis.
