Scantlings

noun

1. (chiefly in the plural) The set size or dimension of a piece of timber, stone etc., or materials used to build ships or aircraft.
2. A small portion, a scant amount.
3. A small, upright beam of timber used in construction, especially less than five inches square.
4. Timber in the form of small beams and pieces.
5. A rough draught; a crude sketch or outline.