Deck, Seat and Pergola Complex

The Plans

Specifications:

Deck posts: 100×100 (4×4) on 100mm (4″) conc pad. Max 1450 crs (58″ O.C.)
Pergola posts: 100×100 (4×4) on 100mm (4″) conc pad. Max 1450 crs (58″ O.C.)
Bearers: 100×100 (4×4) max span 1450mm (58″)
Ledger: 150×50 (2×6) bolted to house blockwork with galv bolts every 900mm (36″)
Joists: 100×50 (2×4) @ 450 crs.(18″ O.C.)

The posts needed to be treated suitable for in ground application. The bearers needed to be treated suitable for in ground application because the deck was built close to the ground, and in some places the bearers would touch the ground.
The joists needed to be treated suitable for exterior use, as they did not touch the ground and air could circulate all around them.
The joists were spaced @ 450crs.(18″ O.C.)