Verschillen voor "Commons Shapes Designation Standard"

Verschillen tussen versies 10 en 12 (omvat 2 versies)

STATUS: DRAFT

This standard defines a universal way to describe a shapes.

Inhoud

Intend
Naming
1. String of shape defining parameters
  1. First character, main shape
  2. Following characters, additional shape characteristics
2. String of geometry defining parameters
  1. Orientation

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", seeking a compromise between habitual naming, being practical and being complete enough to achieve global coverage.
By defining a shape, followed by parameters for geometry, a global unique designation is created.

Naming

A shape is defined by a concatenated string, consisting of two parts:

Shape defining parameters like R for Rectangular bar.
Geometry defining parameters 30*5 for width and height in mm.

Following this example, the designation is:

R30*5

String of shape defining parameters

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

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

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 with a character. From top to bottom:

Char.	Standard, to be expected	Deviation	Examples	Remarks
H	Solid	Hollow	CH, RH	CH is a pipe.
D	1: Parallel thickness	Diverging thickness	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.
S	2: Parallel thickness	Flange is a slope	IDS, UDS	Also typical for some warm rolled products.
E	Width does not equal height and or not equal legs	Equal width and height and or equal legs	LE, TE, ZE	For Squares and Rectangles an E is not applicable. For Z-profiles only equality of legs is meant.
F	No extra flanges	Extra flanges	UF
R	Sharp edges	Round edges	LR, UR	Typical products with one or more bending radii.
X or Y	Whole shape	Shape is cut over length	IDSX, UDY	X is horizontal cutting, Y is vertical, based on orientation in the table with examples and dimensions and as discussed under "orientation".
I	Metric dimensions in millimetres and angles in degrees	Imperial dimensions in inches	RHRI, IDI	If the last character of the shape defining string is I, then the parameters that follow are in inches.

String of geometry defining parameters

The following table shows the implementation of what is above.

dimensions_shapes.svg

Orientation

Shapes are positioned as illustrated. The series H, C, S and R as drawn. The letter series as written. So a H-beam (like HEB) is a variant of the family of I-shapes and is drawn as an I.

Abr.	Meaning
IP	Insertion Point (most logical snap point for CAD)
W	Width, a horizontal dimension.
H	Height, a vertical dimension.
T	Thickness of material.
R	Radius.
A	Angle in degrees

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