Verschillen voor "Commons Shapes Designation Standard"

Verschillen tussen versies 3 en 4

STATUS: DRAFT

This standard describes a universal way to describe a shape.

Intend

The intend is to offer a way to classify industry standard profiles, not limited to steel, based on shape only.

The reasons for using this standard can be:

Shapes are described not depending on manufacturing characteristics such as "warm rolling".
Shapes are described not depending on function characteristics such as "beam".
The names are better suited for use in automation applications.
Naming is based on visible appearance like "Square" and "Rounded".
By prefixing the name with a standard institute and use a trailing general used profile designation, a global unique designation is created that is better understood.

Naming

The name is one or a combination of characters.

The first character is the main shape. Examples: "T-profile" and "Rectangular"
Subsequent characters are only designated if not corresponding to the expected default shape and or add extra shape complexity. This works like a sieve. The longer the code, the more complexity.

First character, main shape

The first character determines the basic shape.

basic_profiles.svg

The first row contains abbreviations:

H	Hexagonal
C	Circular
S	Square
R	Rectangular

Following characters, additional shape characteristics

The sieve consist of characteristics that are additional to the main shape. So what is standard, what is expected is not specified. Deviations are marked wit a character. From top to bottom:

Standard, to be expected	Deviation	Char.	Examples	Remarks
Solid	Hollow	H	CH, RH	CH is a pipe.
1: Parallel thickness	Diverging thickness	D	ID, TD	This is typical for warm rolled and extruded products where internal radii change the thickness or when flanges end in a radius instead of ending straight.
2: Parallel thickness	Flange is a slope	S	IDS, UDS	Also typical for some warm rolled products.
Width does not equal height	Equal width and height and or equal legs	E	LE, TE, ZE	For Squares and Rectangles an E is not applicable. For Z-profiles only equality of legs is meant.
No extra flanges	Extra flanges	F	UF
Sharp edges	Round edges	R	LR, UR	Typical products with one or more bending radii.

The second row is more obvious, the letter represents the shape. O stands for omega.

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