FinishesFinishes
Perforation type, material, color: metal offers a wide range of possibilities and combinations to give free rein to your imagination.
Thanks to our extensive stock of materials, we can offer you our standard perforations and colors in a short time.
We can also meet a wide range of specific color and perforation requirements. Contact our sales department to discuss the feasibility of your metal ceilings, partitions and cladding.
Perforations
Perforations are made on coils or sheets before folding. They contribute to a panel’s acoustic and aesthetic properties.
Perforations can vary in size, shape, arrangement and spacing.
Together, these elements determine the percentage of open area compared with an unperforated sheet.
The coding of the type of perforation works as follows :
A letter designating the shape followed by a number for its dimensions
R > Trou rond
C > trou carré
LR > trou oblong
LC > trou rectangulaire
M > en quinconce à 90°
U > aligné disposé en carré
T > en quinconce à 60 °
Z > alterné (Z1 x Z2)
The percentage of empty space follows or precedes these different terms
Example : R1.5 M5.65 11%
- It is necessary to specify the orientation of certain shapes or layouts by means of a plan. Examples: diamond shapes
the orientation of holes in oblong shapes (vertical, horizontal, diagonal, aligned, crossed, herringbone…). - Each combination of this alpha-numeric coding corresponds to a formula for calculating the open area percentage.
- The choice of points between which the center-to-center distance is measured can vary from one supplier to another, so you have to rely on the percentage of empty space.
- When determining sheet dimensions and bending dimensions, it’s important to take into account the material stretch induced by this operation. Stretch is a function of thickness.
The percentage of empty space follows or precedes these different terms
Example : R1.5 M5.65 11%
Calculating the weight of an unperforated sheet : (Dimensions in mm)
Length x width x thickness x density = weight (kg)
| Exemple de densités arrondies (kg/dm3) : | ||
|---|---|---|
| Acier > 8 | Inox > 8 | Aluminium > 2.7 |
Calculating the weight of a perforated sheet as a whole :
Weight of unperforated sheet x (1 – coefficient) = weight (kg)
(The coefficient corresponds to the percentage of empty space divided by 100, e.g. 11% > 0.11)
Remarks :
Perforations do not necessarily cover the entire sheet, which affects the calculation.
Beyond these basic characteristics, the following parameters can vary production constraints and consequently cost :
- Metal (galvanized steel, electro-galvanized steel, stainless steel, aluminum)
- Whether the material is pre-painted or post-painted
- The addition of lubricant or plastic film to preserve the perforating tool
- Absence of surface damage (scratches, burrs)
- Flatness requirements
- The dimensions of the roll of material, in particular its width
- Accuracy of squareness (allowable margin)
- Dimensions of the perforated zone :
NP - Non perforé
PP - Pliage dans la perforation
BPL - Perforation longitudinale
AR4C - Perforation arrêtée 4 cotés
The know-how and experience of the Echame team guarantees the optimization and simplification of the choice of these parameters through a step-by-step consulting process.
2% R0,8 U
11% R1,5 M
16% R2,5 U
22% R1,5 M
25% Nuagée
Perforations on request
Some examples of perforations available on request, please consult us:
R0,8 U5 2%
R2,5 U11 4%
R11 U15 42,2%
R1,5 U5,65 5,5%
R2,5 U5,5 16%
R12 U20 28%
R1,5 U4 11%
…
R15 U25 28,3%
R1,5 M5,65 11%
R2,5 M5,5 32%
R1,5 M4,3 19%
…
R1,5 M4 22%
…
R1,5 T4,33 11%
R2 T4 22,7%
R10 T18 28%
C3 U11 10,1%
C10 U15 44,4%
C5,5 U8 47,3%
…
C8 U14,28 31,4%
…
LC21X1 EA23
LC53X3 EA8,05
LC61X4 EA10
LR67X3 EA13
LR14X2 EA6,5 23%
LR50X18 EA39
Tints
ECHAME works with pre-painted sheet metal from forges, or galvanized steel sheets that receive a post-painting treatment directly in the factory.
ECHAME is equipped with its own polyester powder coating line, enabling it to produce all colors according to the RAL color chart on a base of 30% gloss.
On our standard whites, light reflection indices have been tested to EN410.
Light reflection depends not only on the shade, but also on the perforation rate.
LIGHT REFLECTION (en %)
Suivant norme EN 410
PV : CSTB n° EMI 18-26077242-1
|
Non perforé |
Perforation 11% |
Perforation 16% |
Perforation 22% |
|
|
Prélaqué 137 |
78 |
70 |
65 |
63 |
|
RAL 9003 |
85 |
73 |
68 |
66 |
|
RAL 9010 |
86 |
76 |
71 |
71 |
|
RAL 9016 |
88 |
77 |
73 |
72 |
CLARTE (CIELAB) (en %)
Suivant norme NF EN ISO 11664-1
PV : CSTB n° EMI 18-26077242-1
|
Non perforé |
Perforation 11% |
Perforation 16% |
Perforation 22% |
|
|
Prélaqué 137 |
91 |
87 |
84 |
83 |
|
RAL 9003 |
94 |
89 |
86 |
85 |
|
RAL 9010 |
94 |
90 |
88 |
88 |
|
RAL 9016 |
95 |
90 |
88 |
88 |
Prepainted: White 137 (similar to RAL 9003)
White 137
Post-lacquered: Standard whites RAL 9003, 9016, 9010, black 9005
30% matte and textured
RAL 9003
RAL 9016
RAL 9010
RAL 9005
RAL 9006
Post-lacquered : All other RAL colors on request
RAL 1001
RAL 5002
RAL 3005
RAL 6005
RAL 7004
RAL 7035
Design and manufacture of ceilings, partitions and metal cladding for ceiling and partition builders.
40 years of know-how – French manufacturing – Reactivity and flexibility – Factory direct Haut de France