Bearers already for marking out joist spacing, wall positions and where service waste lands. Marking position for timber is marked clearly with a bold line and a X on one side of that line. The X indicate that is where the timber is positioned.
Once bearers are all marked out, set the joist on the X mark. Sorting out where different treated timber and lengths are required in floor plan.
Joist are all laid out and positioned with side of the house that is 15mm in from the outside edge of the bearer. This for the 30mm overhang of the boundary joist.
Once the 30mm overhang is positioned, check this with your stringline. Check the other side of the house and the overhang of the joist over the bearer will be 330mm to the stringline, then run another stringline -47mm from the 330mm stringline for boundary joist. Use a combination square to mark a plumb line from the singline, cut all joist to that -47mm line.
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