Handrails on decks are governed by certain criteria.
Enquire at your local building department to see what criteria is required.
The 100x75 (3x4) Balusters were spaced not more than 1800mm (72") and bolted to the
boundary joist with 2 galvanized 12mm (1/2") bolts.
The joists each side of the balusters were fixed to the boundary joist
with nail plates top and bottom, and also with two 12mm (1/2") coach screws per joist.
The 50x50 (2x2) treated uprights were fixed in place, nailed to the boundary joist at the bottom, and nailed to the batten and top rail, at the top.
The uprights were spaced so no gaps were wider than 100mm (4").