hi i am erecting my porch trusses with a gable ladder on the front. the drawing to erect the porch with all the bracing is clearly marked on the plan. i was just wondering if you had to tie the porch into the existing house or would it be strong enough on its own. also the plan shows the first truss 50mm out from the house do you think it would be better flush against the house any opions would be welcome many thanks