EN 959-2018 pdf download.Mountaineering equipment – Rock anchors – Safety requirements and test methods.
4.2.5 In case of expansion-type rock anchors the expansion shall not be dependent on contact with the bottom of the drilled hole.
4.2.6 For glued-in rock anchors, the installed length shall be a minimum of 70 mm. For mechanical rock anchors, the installed length shall be at least five times the diameter of the drilled hole (in accordance with the manufacturer’s instructions).
NOTE For installation in rock softer rather than the concrete test block, a longer length can be necessary to achieve the required load-bearing capacity. Further information is given in Annxi).
4.2.7 If a belay rock anchor, as defined in 3Z. comprises two rock anchors permanently linked together each part of it shall withstand a load of 25 kN. All the components shall be made of the same material, if metallic.
4.2.8 If a rock anchor or a belay rock anchor is fitted with a rope attachment point, the rope attachment point shall have a minimum thickness of 9 mm. The material of the rope attachment point shall be the same as the rock anchor to which it is attached.
4.3 Load-bearing capacity
4.3.1 Axial load-bearing capacity
When tested in accordance with 5.3.2.2. the rock anchor shall withstand an axial load of 15 kN, without being pulled out of the concrete block or breaking.
Permanent deformation is permissible.
4.3.2 Radial load-bearing capacity
When tested in accordance with 5.3.2.3. the rock anchor shall withstand a radial load of 25 kN, without being pulled out of the concrete block or breaking.
Permanent deformation is permissible.
4.3.3 Belay rock anchor linking elements
Belay rock anchor linking elements shall be tested in accordance with 5.3.2.4. and withstand a load of 25 kN.
5 Test methods
5.1 Check of materials
The manufacturer shall provide evidence that the requirements of 4.lare met.
5.2 Concrete block
The concrete block shall have minimum dimensions of 200 mm x 200 mm x 200 mm and a compressive
strength of(50 ± 10) N/mm2.
The maximum grain size of the aggregate shall not exceed 16 mm.
The compressive strength of the concrete block shall be verified on three test samples produced as specified in Iso 1920-3.
NOTE All concrete testing centres produce these types of concrete blocks to order.
5.3 Procedure
5.3.1 Examination of design
Ensure by visual examination and check the dimensions that the specifications in accordance with £ZJ. to are met.
5.3.2 Determination of load-bearing capacity
5.3.2.1 Install the rock anchor into a concrete block in accordance with the information supplied by the manufacturer.
5.3.2.2 Attach the concrete block to a tensile testing machine using clamps at a distance a installed length I + 5 % away from the axis of the rock anchor (see Figwze). Apply an axial load to the rock anchor using a pin with a diameter of(10 ± 0,1) mm in the eye at a rate of(35 ± 15) mm/min,.
5.3.2.3 Install a new rock anchor into a new concrete block in accordance with 5.3.2.1. Attach the concrete block to the tensile testing machine using a support, and a clamp at a distance a installed length I + 5 % away from the axis of the rock anchor (see Figur.eA). Apply a radial load to the rock anchor using a pin with a diameter of (10 ± 0,1) mm in the eye at a rate of (35 ± 15) mm/mm, increasing the load to (8 ± 0,25) kN then reducing the load to less than 0,5 kN. Apply this loading a total of ten times within 10 mm. Again apply a load, increasing it until failure or until the rock anchor is pulled out of the concrete block.
5.3.2.4 The linking element and the rope attachment point shall be tested using two pins of (10 ± 0,1) mm inserted in the eyes of the rock anchors. Apply a tensile load of 25 kN at a rate of (35 ± 15) mm/mm and check that the requirements of 43 are met. Permanent deformation is permitted.
6 Marking
The attachment point of rock anchors shall be marked clearly, indelibly and durably. The markings a) to d) shall be visible when the rock anchor is installed. The marking shall include at least the following:
a) name or logo of the manufacturer;
b) batch or serial number;
c) anchor class (see Table 1), surrounded by a circle;
d) the model identifier (If several models are marketed by the manufacturer).
e) graphical symbol which advises the user to read the information supplied by the manufacturer in accordance with Figure 5:EN 959-2018 pdf download.
EN 959-2018 pdf download
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