Moved on to attaching the floor joists today. These were cut to length based on the plan for the house and were spaced according to this as well. The boundary joist is laminated so that it is double the thickness, where as the ones within the boundary are single pieces of timber.
When doing the spaces we had to calculate where the toilet & shower area's were as the joist had to be shifted to allow for the pipes of these. Also when laying out, we had to ensure the correct treated timber was placed in the right places. Boundary joists and those joists underneath the wet areas needed to be treated at H3.2, and the rest of the area was H1.2. The boundary areas needed this treatment as they are exposed to air, and the wet areas due to the fact that they will be able to withstand water if for some reason there was a leak in this area.
When attaching the floor joists, they needed to be lined up according to the BL, and flush to the lines marked along the bearer. It is important that this is accurate, as otherwise the floor sheets will not have anything to sit on and be attached to. String lines were run down the length of the BL and depending on where abouts on the building they sat, the joists were lined up from this (as some lengths are longer and therefore closer to the BL than recessed areas for example). When attached to the bearer, these were double nailed so they were stable, and bow was angled so the bow was up in the middle so when weight of house was on it, it would straighten out by flattening out.
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