Answer:

ZBAR

Answer	Crossword Clue
ZBAR	Letter-shaped beam
ZBAR	Construction piece
ZBAR	Aptly named beam

ZBAR	Letter-shaped construction piece
ZBAR	Construction piece shaped like the last letter of the alphabet
ZBAR	Doubly bent construction piece
ZBAR	Flanged beam
ZBAR	Steel beam with two right-angled bends