Crosspiece and Jamb

Crosspiece noun - A horizontal beam that extends across something.

Jamb and crosspiece are semantically related. in beam topic. In some cases you can use "Jamb" instead a noun "Crosspiece", when it comes to topics like length of material used as support.

Jamb noun - Upright consisting of a vertical side member of a door or window frame.

Crosspiece and jamb are semantically related. Sometimes you can use "Crosspiece" instead a noun "Jamb".