EN 959:2007 – Mountaineering equipment — Rock anchors — Safety requirements and test methods
1 Scope
This European Standard specifies safety requirements and test methods for rock anchors for use in mountaineering including climbing.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated refer ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12275:1998, Mountaineering equipment — Connectors — Safety requirements and test methods
ISO 1920-3, Testing of concrete – Part 3: Making and curing test specimens
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
rock anchor
anchoring device intended for repeated use after installation, that is inserted into a drilled hole in the rock and held in place by gluing, or expansion forces, or positive locking, and with an attachment point for a connector (in accordance with 3.1 of EN 12275:1998)
3.2
body of the rock anchor
part of the rock anchor that will be installed in the rock
3.3
hanger
attachment point capable of being separated from the body of a rock anchor
3.4
installed length
distance from the rock surface to the furthest point of the body in mechanical contact with the rock or bonded to the rock, after installation
4 Safety requirements
4.1 Materials
All parts of a rock anchor shall be manufactured from the same material.
NOTE Depending on environmental factors, rock anchors are potentially liable to suffer from corrosion. Information on the choice of materials and the need for inspection and maintenance is given in Annex B.
4.2 Design
4.2.1 The overall thickness of the border of the eye shall be 3 mm. If the edges are bevelled, the remaining inner surface shall have a minimum width of 2 mm.
4.2.2 All corners that will be more than 12 mm from the rock surface shall be rounded to a radius R of a minimum 10 mm (see Figure 1).
4.2.3 All edges that can be handled after placement of the rock anchor in the rock shall be rounded to a radius R of minimum 0,2 mm or bevelled to a minimum of 0,2 mm × 45 ° (see Figure 2). This applies to inner and outer edges.
4.2.4 After inserting the rock anchor in the concrete block, the eye shall be wide enough to accommodate two pins, one with a diameter of (15 ± 0,1) mm for the lower part and one with a diameter of (11 ± 0,1) mm for the upper part (see Figure 1).
4.2.5 In case of expansion-type rock anchors the expansion shall not be dependent on contact with the bot- tom of the drilled hole.
EN 959:2007 – Mountaineering equipment — Rock anchors — Safety requirements and test methods