New Dormer - Fixing Methods

[EViS]

I seem to have got my head around building a new dormer. However I have a couple of (fairly basic but fundamental) questions remaining.

1. What's the most common fixing method between various timbers - screws or nails? If nails, what size are usual and is a nail gun recommended for speed?

2. Other than bolting the outer-most joists together, are any other fixings (e.g. steel braces/straps, etc.) required anywhere on your average dormer without any steel beams?

 

[catlad]

If you are using 2" timber 4" galv nails piloted sometimes to stop splitting, large screws spax do large timber anti corrosive fixings, and a nail gun if you have one.

 

[Alastairreid]

http://www.buildingregs4plans.co.uk/loft_conversion_plans.php

http://www.buildingregs4plans.co.uk/guidance_flat_roof_structure.php