Angle iron

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angle iron

[′aŋ·gəl ‚ī·ərn]
(civil engineering)
An L-shaped cleat or brace.
A length of steel having a cross section resembling the letter L.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Angle iron

A steel section, either hot-rolled or cold-formed, consisting of two legs, almost always at a right angle.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

angle iron, angle bar

An L-shaped iron or steel bar or structural steel member.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.