Pick the material — the calc quantifies THAT member. APPLY drops every line into the takeoff, grouped by trade — framing never mixes with the trades that cover it. Rake tab builds the per-stud CUT LIST and the lumber order by stock length. Export JSON feeds a job pack. Sheathing at 32 SF/sheet gross (typ.), drywall at 48 SF/board net. Lines marked VERIFY follow rules of thumb — set to your engineering (Law #4).