The angle of obstruction of the ‘A’ pillar on the driver's side is the angle formed on the plane view by a parallel, starting from E2, to the tangent joining E1 with the outer edge of section S2 and the tangent joining E2 to the inner edge of section S1 (see Annex 4, Appendix, Figure 3).
Déterminer la coupe horizontale du montant «A» à partir du point le plus antérieur de l'intersection du montant «A» et du plan incliné (voir annexe 4, appendice, fig. 2);