A framing beam positioned between trimmers and supported at each end by a tail beam.

Brick or stone laid in a wall with its narrow end facing the wall.

The first section of a message, which contains information such as the addressee, routing, and origination time.

See <<header label>>

A mounting plate through which the insulated terminals or leads are brought out from a hermetically sealed relay, transformer, transistor, tube, or other device.

A pipe, conduit, or chamber which distributes fluid from a series of smaller pipes or conduits; an example is a manifold.

Text that is printed at the top of every page of a document or report; may contain the page number.

A machine used for gathering or upsetting materials; used for screw, rivet, and bolt heads.

1. An entry-boring machine that bores the entire section of the entry in one operation.

2. A rock that heads off or delays progress.

3. A blasthole at or above the head.