I did a very rough translation from 2400 mg into teaspoons and got 1/2 a teaspoon as my answer. Note that this included a very iffy conversion from weight to volume measure, arguably flawed at best.
I'm very bothered by the amount of salt people consume (in US, CA, EU or anywhere) but I'm particularly bothered by the amount of salt that I myself consume. Half a teaspoon is getting into the area that I'm very uncomfortable with. I think the 2400 mg RDA is very important, important enough that I think everybody should heed the warning and set that as their maximum.
Only problem is, there's so much salt in everything that it's hard to tell when you're nearing the borderline.
Usually figure 1 tsp of salt as the recommended amount for one day.