RHEINZINK® - Angled Standing Seam

Product Overview

In the realm of sheet metal technology, the angled standing seam is a relatively new development: it has only received mention in technical literature since the beginning of the 20th Century. For roofs with a pitch of at least 25°, it constitutes the norm. Compared to the double lock standing seam, seam closure of prefabricated sections is particularly easy, as the finished angled standing seam is created by only seaming one side. The angled standing seam is preferred in visible areas, where the pitch of metal roofing is higher, e.g. parapets, attics and mansard roofs; whether in traditional vertical, diagonal or horizontal application.  Although it appears wider than the double standing seam, the angled standing seam still offers prominent vitality and quite a slender effect to the structure of large surfaces.

Technology

          Description of system
  • Façade cladding
  • Cladding small surface areas (fascias, attics, etc.)
The angled standing seam is used in roof areas with a ≥ 25° pitch, in the façade area and for cladding small surface areas such as fascias, attics, parapets, etc. With its height of ca. 25 mm and a seam width of ca. 12 mm, roof and facade surfaces are clearly structured.

The angled standing seam is distinguished by its low material stress. In contrast to the double lock standing seam, only one side is closed - either by machine or by hand. Onsite, the angled standing seam is produced with the aid of a profiler.

Surface Quality

The patination process of RHEINZINK - material can take longer in the façade area. In the transition period, bright-rolled material with qualities more likened to thin sheet metal, tends to reflect light.

RHEINZINK-façade cladding should principally be carried out in RHEINZINK-"pre-weathered-pro blue-grey" or "graphite-grey"* surface qualities.

Furthermore, we recommend using sheet material in order to significantly reduce wave formation, which is specific to thin sheet metal.

Surface Protection

In order to protect the surface during manufacture and transport, and to provide protection against negative influences during the construction phase, we recommend covering the material in foil at the factory. The self-adhesive strippable film should be removed directly after installation at the end of each working day.

          Section width / Thickness of material
  • optimum section width 400 mm (coil width 470 mm)
  • material thickness = 0,8 mm
For facade cladding with angled standing seam, we recommend a section width of 400 mm. It is also advantageous to manufacture the sections from sheet material and to edge these on a folding press, in order to be able to significantly reduce the inevitable formation of waves on thin sheet steels.

Section lengths

The section length should be reduced to a maximum of 6.0 m, otherwise it is almost impossible to handle behind scaffolding. The optimum reduction of distortion is acheived with section lengths of 3.0. The sections are joined together with a single cross seam.

Fastening

As a rule, fastening is indirect with clips in the seam area or with continuous cleats in the folds at the end of the section (in isolated cases, individual fasteners are used here too).

The clips are divided into fixed and sliding clips. Just as for roofing, the number of clips per square meter depends on the prevailing wind suction strengths, the fasteners and the selected roof construction. Beyond that, section width and material thickness have a considerable influence on the number of clips.

Coil width/mm
Section width/mm*
Section width/mm**
Metal thickness/mm		 500
420
430
0.7		 570
490
500
0.7		 600
520
530
0.7		 670
590
600
0.7		 700
620
630
0.7		 800
720
730
0.8
Wind load in kN/m²            
- 0.3
- 0.6
- 0.9
- 1.2
- 1.5
- 1.8
- 2.1
- 2.4
- 2.7
- 3.0
- 3.3
- 3.6
- 3.9
- 4.2
- 4.5
- 4.8
- 5.1		 4/500
4/500
4/500
4/500
6/350
7/300
8/250
8/250
10/200
11/200
11/200
13/150
13/150
15/150
15/150
17/100
17/100 		4/500
4/500
4/500
4/500
6/350
7/300
8/250
8/250
10/200
11/200
11/200
13/150
13/150
15/150
15/150
17/100
17/100		 4/500
4/500
4/500
4/500
6/350
7/300
8/250
8/250
10/200
11/200
11/200
13/150
13/150
15/150
15/150
17/100
17/100		 4/500
4/500
4/500
4/500
6/300
7/300
9/250
9/250
10/200
11/150
11/150
13/150
 4/500
4/400
4/400
4/400
6/250
7/250
9/200
9/200
10/150		 4/400
4/400
4/400
4/400
6/250
7/250
9/200

Note: Establishing the clips and spacing of clips is based on an average section length of ca. 3 m.
* approx. section width when manufactured manually
** approx section width when manufactured by machine
Table: Minimum number of RHEINZINK-clips (per square meter)/max. distance between clips (mm) depending on wind load

Coil width/mm
Section width/mm*
Section width/mm**
Metal thickness/mm
Number of clipsl/m²		   500/570/600
420/490/520
430/500/530
0.7
n/s		 670
590
600
0.7
n/s		 700
620
630
0.7
n/s		 800
720
730
0.8
n/s
Building height in m Building area        
0 to ≤ 8.0 Corner
Edge
Centre		 7/300
4/500
4/500		 7/300
4/500
4/500		 7/250
4/400
4/500		 7/250
4/400
4/500
> 8.0 to ≤ 20.0 Corner
Edge
Centre
 10/200
6/350
4/500		 10/200
6/350
4/500		 10/150
6/300
4/400		  
> 20.0 bis ≤ 100 Corner
Edge
Centre
 13/150
8/250
4/500		 13/150
8/250
4/500		    

* approx. section width when manufactured manually
** approx. section width when manufactured by machine
Table: Lowest number n of RHEINZINK-clips in Germany. Establishing the number depends on the height of the building and the section width/metal gauge according to the design loads of DIN 1055, Part 4 and/or prEC 1; s = distance between clips in mm, n = lowest number of clips/m²

Fixed Clip Area

Fixed clips, which prevent the sections from slipping, should be installed on the upper 1 - 3 m of the facade, depending on height of building (total length of individual sections).

Fasteners

In Europe, flat-headed nails and roofing nails have become the suitable fasteners for clips.

Fastening RHEINZINK-sections depends primarily on the type and design of the substructure. The demands on the construction, beginning with wind loads as well as section width and thickness of metal, must be considered when selecting the fasteners.

Cross Seams

Cross seams are created for design purposes and to separate individual section lengths. In façade cladding with angled standing seam, the individual sections are joined together with a simple cross seam.

  RHEINZINK® - Angled Standing Seam
  • A vibrant, elegant structure even for large surfaces.
  • Feasible with tapered surfaces as well as concave and convex rounded surfaces.
  • Prominent optical structuring of the roof surface with a ca. 12 mm seam width.
  • Simple, efficient installation by closing just one seam
  • Rainproof lengthwise connection
  • Use of prefabricated panels or sections
  • Panel lengths up to 16.0 m are possible



  RHEINZINK® - Angled Standing Seam

In the realm of sheet metal technology, the angled standing seam is a relatively new development: it has only received mention in  technical literature since the beginning of the 20th Century.  For roofs with a pitch of at least 25°, it constitutes the norm.  Compared to the double lock standing seam, seam closure of prefabricated sections is particularly easy, as the finished angled standing seam is created by only seaming one side.  The angled standing seam is preferred in visible areas, where the pitch of metal roofing is higher, e.g. parapets, attics and mansard roofs; whether in traditional vertical, diagonal or horizontal application.  Although it appears wider than the double standing seam, the angled standing seam still offers prominent vitality and quite a slender effect to the structure of large surfaces.

* available on request