Exterior stair rail....does the 4 inch rule apply ?

Mobil home in southern Calif.


If you mean baluster spacing…yes.

When the floor surface (landing) is above 30 inches.

Probably not required when originally built. :smiley: but good call

thanks everybody…

No. In (level) guardrails it’s 4". In (slanted) handrails ballusters it’s 4 3/8". don’t get it wrong. Depends on year of construction (like Brian already said)