📊 Total Materials Needed

Enter dimensions above to see results

Code requirements: 36" minimum height for residential, 42" for commercial decks
Maximum 4" gap between balusters (a 4" sphere must not pass through)
Posts should be spaced 6–8 ft apart maximum for structural strength
Wood railing costs $15–25/linear ft installed; composite runs $30–60/linear ft
Use 6×6 posts for a sturdier look, or 4×4 for a lighter appearance
Deck rails over 30" above grade typically require a permit — check local building codes