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Flat Corrugated Metal Sheaths

Flat corrugated profiles derived from specified round diameters. Use the transformation diagram to read round → flat equivalence.

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When flat is specified
0.40 / 0.45 mm
Thickness 0.40 / 0.45 mm · Flat 66/22–94/28
66/22–94/28
EN 523 / 524 Compliance
EN 523 / EN 524

Overview

Flat ducts are used where slab depth, tendon layout or congestion makes a round sheath impractical. Each published flat size is produced from a defined round diameter. The round origin remains the reference for coupler and process selection.

  1. 01

    Restricted structural depth

  2. 02

    Banded tendon layouts

  3. 03

    Coordination with congested reinforcement

Product photography placeholder — corrugated duct

Round to flat transformation

The flat profile is formed from the listed round diameter. Example: round Ø60/65 is produced as flat 72/21.

7 sizes

Steel Thickness Flat Dimension Produced From Round Diameter Type Weight kg/m Actions
0.40 / 0.45 66/22 48/53 Flat 0.614
0.40 / 0.45 68/22 50/55 Flat 0.636
0.40 / 0.45 78/22 55/60 Flat 0.722
0.40 / 0.45 72/21 60/65 Flat 0.844
0.40 / 0.45 83/24 60/65 Flat 0.754
0.40 / 0.45 88/29 65/70 Flat 0.798
0.40 / 0.45 94/28 70/75 Flat 0.868
Steel Thickness
0.40 / 0.45
Flat Dimension
66/22
Produced From Round Diameter
48/53
Type
Flat
Weight kg/m
0.614
Steel Thickness
0.40 / 0.45
Flat Dimension
68/22
Produced From Round Diameter
50/55
Type
Flat
Weight kg/m
0.636
Steel Thickness
0.40 / 0.45
Flat Dimension
78/22
Produced From Round Diameter
55/60
Type
Flat
Weight kg/m
0.722
Steel Thickness
0.40 / 0.45
Flat Dimension
72/21
Produced From Round Diameter
60/65
Type
Flat
Weight kg/m
0.844
Steel Thickness
0.40 / 0.45
Flat Dimension
83/24
Produced From Round Diameter
60/65
Type
Flat
Weight kg/m
0.754
Steel Thickness
0.40 / 0.45
Flat Dimension
88/29
Produced From Round Diameter
65/70
Type
Flat
Weight kg/m
0.798
Steel Thickness
0.40 / 0.45
Flat Dimension
94/28
Produced From Round Diameter
70/75
Type
Flat
Weight kg/m
0.868
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Downloads

Flat corrugated duct catalogue

Product Catalogs · EN / TR · [File size] · [Rev. / Date]

File not yet published

Flat duct technical data sheet

Technical Data Sheets · EN / TR · [File size] · [Rev. / Date]

File not yet published
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