Most pressurised jets have plug type overwing exits and doors - I am not sure what the Embraer? has, but pressumably works on the same principal, whereby the internal pressurisation of the plane prevents any door from opening. (as the door has to be brought inwards first against the pressure)
Not quite sure of the figures - but a B767 for example pressurised to approx 8.5 psi against a door (i am guessing the figures for the dimensions) say 2.2 meters by 1.5 meters (86 inches x 59 inches = 5109 Sq Inches x 8.5 psi) = approx 44000lb holding the door shut - which is close to 20 tonnes of pressure? ??? i dont think anyone is going to budge it....
I am sure someone can refine that or make it close to correct........
