Definitions for "Spars"
Short lengths (27"- 30") of cleft hazel that are used by thatchers to secure layers of straw or reed to rooves when thatching. Pointed at both ends they are twisted and used as a pronged peg to hold the thatch. Longer layers of split hazel are also used to hold the outer layer of thatch. These are often known as liggers. Most spar makers will be able to supply these too.
Keywords:  booms, masts, gaffs, yards, sails
A general term for masts, yards, booms, gaffs, etc.
The general term for masts, booms and other similar poles used to support sails.
Keywords:  spanwise, tail, wing, load, carrying
Spanwise load-carrying members of a wing or tail.