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We just built a fairly substantial deck (about 100sqm) we made ours out of 4x4 oak posts and then 6x2 treated timber on top, we used galvanised coach bolts to connect the posts to the rails and then a combination of 100mm and 150mm coated timberlock screws to connect the 6x2 together where needed. I hate cutting 90 degrees with a circular saw, surely time to invest in a cheap chop saw?! Can't go wrong with the Aldi or Lidl one for £100...
Building a deck... Would people use joist hangers for the sub frame or screw/nail directly? Timber is 145x45 c24 and sat on concrete blocks with rubber feet to lift away from water.
When I built the sub frame for my shower I had issues with my circular saw not cutting ends at exactly 90°, so screwing pulled things out of true, whereas hangers (with nails) gave some adjustment.