Base tables anchor efficiency

by Stefan Junghannß
April 30, 2013
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The following tables provide summary information about the tested anchor strength and efficiency of various webbings combined with various anchors.

The values have been determined in good faith. The tests were done on different testing fascilities. For each case, the breaking strength was measured in Kilonewtons (kN), the break load efficiency refers to the ultimate strength of the webbing, tested by the webbing manufacturer. The values are subject to scatter and tolerances and are not absolute. The size of the scatter tolerance depends on the webbing anchor.

The banana style webbing anchors were tested with single wrap method. For webbings with a high danger of slipping a double wrap was done (see note 1).

Base table Polyester

The following table lists all known values of polyester slacklines with various webbing anchors.

Tabelle 1: Einspannereffizienz Polyester
Webbing anchorWhite Magic*Core
factory ultimate strength
32 kN / 100%
43 kN / 100%
Zilla 2 (36mm)
30,5 kN / 95%
38 kN / 89%
Ringlocker 3,25 to GP 30 kN / 94%
Zilla 1 (30mm)
28,6 kN / 89%
Lynx 2 (22mm)
27,5 kN / 86% 32 kN / 75%
sewn end loop
25 kN / 78%
Lockman (eff. 17mm) 24 kN / 75%
Lynx 1 (14 mm) 23,5 kN / 73%
Linelocker big+padded
22 kN / 69%
Overhand bend 4fach 2fachSchlauch 22 kN / 69%
Figure eight double 20 kN / 63%
Yosemite bowline double 17 kN / 53%
Chain link linelocker
15,5 kN / 48%
Munter hitch + securing knot 15,5 kN / 48%
single overhand bend
13 kN / 41%

*the strength of White Magic, Verve and Nova Magic are nearly identical

Base table Polyamid

The following table lists all known values of polyamid slacklines with various webbing anchors.

Tabelle 2: Einspannereffizienz Polyamid
Webbing anchorWaveT-WaveSonic
factory ultimate strength
21 kN / 100%
38 kN / 100%
31,5 kN / 100%
Lynx 2 (22mm) 36 kN / 95%

Base table High-Tech

The following table lists all known values of slacklines, made of high-tech materials like Dyneema or Vectran, with various webbing anchors.

Tabelle 3: Einspannereffizienz Dyneema/Vectran
Webbing anchorAeon
factory ultimate strength

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