1.6. Commercial size of timber

Common trade names:

a) Log - A trunk with branches off.

b) Plank - Pieces 38 mm to 100 mm (1½" to 4") thick and 150 mm (6") or over wide.

c) Boards - Pieces 10 mm to 38 mm (3/8" to 1½") thick and 75 mm (3") and over wide.

d) Battens - Pieces 19 mm to 38 mm (¾" to 1½") thick and from 25 mm to 75 mm (1" to 3") wide.

e) Strips - Under 19 mm (¾") thick and up to 75 mm (3") wide.

f) Moulding - Shaped timber, can be plank, boards, strips etc...

Plank

Battens and Stripes

Boards

Mouldings

Manufacturing terms:

a) Rough Timber - Timber with sawn surface.

b) Dressed Timber - Machine planed timber.

E.g. DIS - Dressed one side

DD (or D2S) - Double dressed or dressed two sides.
DAR (or D4S or PAR) - Dressed all round, dressed four sides or planned all round.

c) Milled Timber - A machine shaped or moulded timber. E.g. tongue and groove, rebated dowels etc. .