* Probably an unequal angle, with a long and short leg.
In your text it was probably important to specify positioning, whether equal or unequal angles are in question, hence my proposal "vertical angle leg" (long or short).

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Note added at 9 hrs (2009-05-27 08:23:16 GMT)
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"bar" is probably wise to include, but not essential in the steelwork trade.

Definitions of " cantoneira" on the Web in Portuguese:

* Cantoneira é um perfil metálico composto por duas abas, simétricas ou não, formando um ângulo de 90 graus.É um material muito utilizado em construções metálicas pela elevada resistência à flexão.
www.pt.wikipedia.org/wiki/Cantoneira

* Peça em forma de L que remata quinas ou ângulos de paredes. Também serve de apoio a pequenas prateleiras.
www.obraweb.com.br/dicionario-da-construcao

* Peça em madeira ou perfil metálico em forma de L para reforçar quinas ou ajustar cantos de peças de cenários.
www.geocities.com/jcserroni/glossario.htm

Definitions of " angle iron" on the Web:

* angle bracket: an L-shaped metal bracket
www.wordnet.princeton.edu/perl/webwn

* Structural steel is steel construction material, a profile, formed with a specific shape or cross section and certain standards of chemical composition and strength. Structural steel shape, size, composition, strength, storage, etc, is regulated in most industrialised countries.
www.en.wikipedia.org/wiki/Angle_iron

* A piece of iron that forms a right angle and is used to span openings and support masonry at the openings. ...
www.nachi.org/glossary.htm

* Provides supporting lintels for openings in masonry wall construction.
www.archiseek.com/guides/glossary/a.html

* An angle iron is a length of steel or iron bent at a right angle along its long dimension and used as a support or structural framework. ...
www.merkleysupply.com/glossary.asp

* A rolled piece of steel having a cross-section shaped into a right angle.
www.sdrc.lib.uiowa.edu/eng/bridges/WaddellGlossary/GlossA.h...

Maximizing your ironworkers potential: A station-by-station ...
A die located in the middle of a die holder can inhibit its ability to punch close to the web of the angle iron and channel. Die holders with offset dies ...
www.thefabricator.com/Punching/Punching_Article.cfm?ID=857

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Note added at 1 day6 hrs (2009-05-28 05:54:15 GMT) Post-grading
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Results 1 - 30 of about 465,000 for "angle iron"

Results 1 - 30 of about 149,000 for "angle bar".

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Note added at 1 day6 hrs (2009-05-28 06:02:14 GMT) Post-grading
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Mercedes-Benz Ponton Sub-Frame Castor Assembly © www.mbzponton.org
9 May 2002 ... measurements are as indicated in the schematic, centered left/right and at the indicated height on the vertical web of the angle iron. ...
www.mbzponton.org/valueadded/maintenance/bristow/castor.htm -

ELECTRIC CIRCUIT BREAKER HAVING AN ARCING CONTACT WITH LARGER ...
... braid being sandwiched between the other web of the angle iron and the hinge contact block so as also to be attached thereto by the screws. Description: ...
www.freepatentsonline.com/3735075.html

Expansion-contraction joint - Patent 3974614
... and a leg 32 extending transversely from the web of the angle iron 22 toward the web of the angle iron 22' and having a length advantageously in excess ...
www.freepatentsonline.com/3974614.html

Contract Manufacturing Little Trailers on a Big Scale
The caster's wheels are indented so that they ride on the angle iron's web area. The Chickasha operation uses a dedicated bay system for manufacturing the ...
www.trailer-bodybuilders.com/mag/trucks_contract_manufactur... -

anvilfire Guru page : August 9 - 18, 2002
Co. of Rockford, Ill. It includes a notcher to cut a notch in an angle iron web; a bender that bends that notched angle iron, and a shear that mechanically ...
www.anvilfire.com/FAQs/archives/g082002b.htm

Treatise on iron ship building: its history and progress as ... - Google Books Result
by William Fairbairn - 1865 - Naval architecture - 313 pages
In wake of armour plates, spaces between frames to be filled in solid with teak, iron ceiling increased in thickness, and perpendicular angle-iron web ...
www.books.google.com/books?id=2u4OAAAAYAAJ...