I am also searching for the web address for Fine Home Building Magazine. Martin A - I would contact the manufacturer of the specific siding product which you plan to use and ask for a copy of the specifications and installation instructions. Your local distributor may also have such written information. Fine Homebuilding does not appear to have a web page. This is a complete and very detailed set of specifications and instructions.
Some walls are load bearing.
I want a continuous smooth ceiling. This is the type of a project which would benefit from a short consultation with a local licensed engineer. You would then know how to size and support the beam. You might even learn some valuable shortcuts. I was going to repair the floor myself.