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Grootte: 3582
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Grootte: 5346
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| Verwijderingen worden op deze manier gemarkeerd. | Toevoegingen worden op deze manier gemarkeerd. |
| Regel 6: | Regel 6: |
= Summary = This standard describes a way to specify basic shapes of sections, together with their dimensions. A code is build with blocks. {{{ [Shape block][Details block][Units block][Geometry block]}}} * Shape block: This is one charater for the main shape * Abbreviations: H Hexagonal, C Circular, S Square, R Rectangular or... * Letters of letter shapes sections: I, U, L, T, O, Z (O is omega shape). * Details block: Zero or more characters constraining the shape. They are only added if required. Order is alphanumerical. * H Hollow sections * E Equal width and height and or equal legs * R Round edges * F Flanges extra * D Diverging thickness, no straight endings and all parallel width at corners * S Flange has a slope * X or Y Section is cut over x- or y-axis * Units block: Zero or one character, zero for metric in mm and "I" for imperial in inches. * Geometry block: All dimensions needed to constrain a section * The logical order is: First Width and height, then thickness in same order, radii and angles. * Angles can be degrees or ratios like "7/50". * Dimensions are nominal. * The list separator is an asterisks "*" |
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| Regel 14: | Regel 40: |
| * Shapes are described not depending on material characteristics such as "steel". | |
| Regel 48: | Regel 75: |
| ||'''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. || ||'''R''' ||Sharp edges ||Round edges ||LR, UR ||Typical products with one or more bending radii. || ||'''F''' ||No extra flanges ||Extra flanges ||UF || || |
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| Regel 50: | Regel 80: |
| ||'''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. || |
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| Regel 54: | Regel 81: |
| ||'''I''' ||Metric dimensions in millimetres ||Imperial dimensions in inches ||RHRI, IDI ||If the last character of the shape defining string is I, then the parameter that follow are in inches and or degrees. || | ||'''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. || |
| Regel 61: | Regel 88: |
| Next line | === 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|| |
STATUS: DRAFT
This standard defines a universal way to describe a shapes.
Inhoud
Summary
This standard describes a way to specify basic shapes of sections, together with their dimensions.
A code is build with blocks.
[Shape block][Details block][Units block][Geometry block]
- Shape block: This is one charater for the main shape
- Abbreviations: H Hexagonal, C Circular, S Square, R Rectangular or...
- Letters of letter shapes sections: I, U, L, T, O, Z (O is omega shape).
- Details block: Zero or more characters constraining the shape. They are only added if required. Order is alphanumerical.
- H Hollow sections
- E Equal width and height and or equal legs
- R Round edges
- F Flanges extra
- D Diverging thickness, no straight endings and all parallel width at corners
- S Flange has a slope
- X or Y Section is cut over x- or y-axis
- Units block: Zero or one character, zero for metric in mm and "I" for imperial in inches.
- Geometry block: All dimensions needed to constrain a section
- The logical order is: First Width and height, then thickness in same order, radii and angles.
- Angles can be degrees or ratios like "7/50".
- Dimensions are nominal.
- The list separator is an asterisks "*"
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".
- Shapes are described not depending on material characteristics such as "steel".
- 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.
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. |
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. |
R |
Sharp edges |
Round edges |
LR, UR |
Typical products with one or more bending radii. |
F |
No extra flanges |
Extra flanges |
UF |
|
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. |
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.
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 |