There is no maximum height.
Balcony railing height cm.
In some states such as california the minimum height is 42.
A railing is only necessary if the deck is 30 or more off the ground and 24 in certain jurisdictions.
For business or fencing use the railings should be 42 or 48 inches.
This should measure from the top edge of the top rail down to the the deck surface.
Decks 24 to 5 10 180 cm need 36 guards and anything above 5 10 requires a 42 high railing.
This applies to the broad majority of the united states for all residential decks.
Each community has different height requirements to determine if the porch or balcony requires railings.
Respect minimum height requirements safety is important and something that should always supersede style.
Deck railing height is a minimum of 36.