Method for attaching mounted parts to concrete or masonry

A method for rating and carrying out an attachment of mounted parts to a mounting substrate, having a surface, which is formed of concrete or masonry, using a group of anchors, said method comprising:

• (1) determining a rated value VSd and NSd of the transverse load and tensile load and a corresponding ratio VSd/NSd respectively for each anchor within said group when mounted perpendicularly to the surface of said mounting substrate, confirming for each anchor within at least a subset of said anchors within said anchor group that the corresponding ratio VSd/NSd of the rated value of the transverse load VSd and the rated value of the tensile load NSd exceeds a value of 0.3 and that the ratio of a characteristic resistance to transverse loading VRk and to tensile loading NRk is less than 1.1, wherein each of the values VSd, NSd, VRk and NRk refer to an anchor when mounted perpendicular to the surface of the mounting substrate,
• (2) determining for each anchor having a head within said subset as to whether the rated value of the loading exceeds the rated value of the resistances of this anchor with respect to at least one failure mechanism, provided that this anchor is positioned with its head tilted in a direction of the corresponding rated value VSd at an angle of inclination αanchor to the normal to the surface of the mounting substrate, wherein:
• αanchor=k*¾*arc tan(VSd/NSd) for NSd>0, and
• αanchor=k*67.5° for NSd=0,
• where:
• 0.6<k<1.34
• and
• (3) if it is determined that said loading does not exceed the rated value of the resistances of this anchor with respect to said at least one failure mechanism, mounting said at least one anchor in the anchor group mounted at said angle of inclination αanchor.

A method for rating and carrying out an attachment of mounted parts to a mounting substrate, having a surface, using a group of anchors, said method comprising:

• (1) determining a rated value VSd and NSd of the transverse load and tensile load respectively for each anchor within said group when mounted perpendicularly to the surface of said mounting substrate, confirming for each anchor within at least a subset of said anchors within said anchor group that the corresponding ratio VSd/NSd of the rated value of the transverse load VSd and the rated value of the tensile load NSd exceeds a value of 0.8 and that the ratio of a characteristic resistance to transverse loading VRk and to tensile loading NRk is less than 1.1, wherein each of the values VSd, NSd, VRk and NRk refer to an anchor when mounted perpendicular to the surface of the mounting substrate,
• (2) determining for each anchor having a head within said subset as to whether the rated value of the loading exceeds the rated value of the resistances of this anchor with respect to at least one failure mechanism, provided that this anchor is positioned with its head tilted in the direction of the corresponding rated value VSd at an angle of inclination αanchor of between 35° and 55° to the normal to the surface of the mounting substrate, and
• (3) if it is determined that said loading does not exceed the rated value of the resistances of this anchor with respect to said at least one failure mechanism, mounting said at least one anchor in the anchor group mounted at said angle of inclination αanchor.