Steel angles are most commonly used as lintels installed over openings to support the brickwork above windows & doorways. Steel angles are often also used for a variety of fabricated items such as raking angles, shelf lintels (cast-in angles), brackets and cleats. For most applications galvanised steel angles suffice for use as lintels in Western Australia, however in very close proximity to the ocean or breaking surf the Building Code of Australia often requires an additional epoxy/painted treatment.
COMMON ANGLE LINTEL SIZES
Steel angle normally comes in sizes ranging from 25x25x3 EA up to 200x200x26 EA.
The most widely used angle lintel thickness is 8mm as it best suits the mortar joint between the bricks. 6mm & 10mm are also regularly used depending on the spans required by the door or window openings.
EQUAL ANGLE (EA)
Equal angles are equal in width and height; i.e. 75x75x8mm steel angles.
UNEQUAL ANGLE (UA)
Unequal angles have varied width and height; i.e. 125x75x8mm and 150x90x8mm steel angles.
ANGLE LINTEL SPAN CHART*
The following are typical lintel spans for a single storey tiled roof:
|LINTEL SIZE||MAXIMUM OPENING|
|75×8 FL||Up to 0.9m|
|75x75x6 EA||Up to 1.3m|
|75x75x8 EA||Up to 1.6m|
|100x75x8 UA||Up to 2.4m|
|100x100x8 EA||Up to 2.4m|
|125x75x8 UA||Up to 3.0m|
|150x90x8 UA||Up to 3.6m|
|150x100x10 UA||Up to 4.3m|
*Consult your engineer where construction is 2 storey or if there is greater than normal load over an opening.