RHEINZINK® - Angled Standing Seam

Product Overview

RHEINZINK® - Seam technology A vibrant, elegant structure even for large surfaces. Feasable 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.

Technology

System Description Roof covering from a pitch of 25° Façade cladding Small surface cladding (fascias, attics, etc.) The angled standing seam is used in roof areas with pitches over 25°, in façade areas and in cladding small surfaces such as fascias, attics, parapets etc. Its height of ca. 25 mm and seam width of ca.12 mm, allows roof and facade surfaces to be divided in an aesthetically pleasing manner. The angled standing seam is particularly notable for its low material stress. Contrary to the double lock standing seam, only one seam is closed here - either manually or by machine. The angled standing seam is produced using profilers (length ≤ 16.0 m), or folding presses (length ≤ 6.0 m). Tapered areas as well as concave and convex rounded surfaces can be clad with the angled standing seam.

The angled standing seam is used in roof areas with pitches over 25°, in façade areas and in cladding small surfaces such as fascias, attics, parapets etc. Its height of ca. 25 mm and seam width of ca.12mm, allows roof and facade surfaces to be divided in an aesthetically pleasing manner.

The angled standing seam is particularly notable for its low material stress. Contrary to the double lock standing seam, only one seam is closed here - either manually or by machine. The angled standing seam is produced using profilers (length ≤ 16.0 m), or folding presses (length ≤ 6.0m).

Tapered areas as well as concave and convex rounded surfaces can be clad with the angled standing seam.

						Section Width / Material Thickness Section widths of 400 – 600 mm Material thickness 0.7 mm / 0.8 mm The section width of ca. 530 mm (coil width 600 mm) is the international standard for angled standing seam roofs, with a material thickness of 0.7 mm. However, practical building experience indicates that, in exceptional cases, it is necessary to reduce the section width and increase material thickness. This can counteract possible deflections from high winds.
						Section Lengths Customary section length is up to 10.00 m In special cases up to 16.00 m The general standard maximum section length is 10.00 m. In special cases, section lengths of up to 16.00 m can be installed. In this case, fastening and connection details of the sections must be adapted to increased length. If the max. possible section length is insufficient, individual lengths may be connected with cross-joints.

Fixing

• Indirect via clips in the seam area
• Indirect via continuous cleats in the bends at the end of the section or panel

Fastening is always indirect: fasteners are attached in the seam area, or seam strips in the edges at section ends (although in some cases, individual fasteners are used there as well).

Three kind of fasteners are used: fixed clips, sliding clips and long sliding clips. The number of clips per sqm depends on wind suction forces, fasteners and roof construction. Above and beyond that, section width and material thickness also impact significantly on the number of clips required.

Table: minimum number of RHEINZINK® clips (per m²)/max. distance between clips (mm) depending on wind loads

Note: The dimension of the clip and the distance between the clips is based on an average section length of ca. 3m.

* ca. section width when hand finished
** ca. section width when machine finished

						Fixed Clip Area Roof surface fixed clip area is between 1.0 m and 3.0 m. In order to prevent the sections from slipping, a fixed clip area is allocated on the roof surface, depending on roof pitch. Depending on section length, the portion with the fixed fasteners can be between 1 and 3 m long, but not more than a quarter of the section length.

Fasteners

• Mainly flat headed nails or roofing felt nails.

In Europe, flat headed nails, roofing felt nails and/or spiral nails have become accepted fasteners.

Fixing RHEINZINK® - roofing depends primarily on the type and design of the substructure. Construction requirements must take into account snowfall and wind loads, as well as section width and material thickness, when selecting fasteners.

Table: medium static extraction values (in Newtons) of standard fasteners for RHEINZINK® seamed roofs and façades, depending on the substructure.

Cross-Joints Single cross-seam from a roof pitch of ≥ 25°. To separate excessively long section lengths and for design reasons, cross-joints can be formed.  The development of cross-joints depends on roof pitch.

Simple cross-seam

• The simple cross-seam can be used as a cross-joint for roof pitches of ≥ 25°.