# US 11,306,496 B2 · Method for attaching mounted parts to concrete or masonry

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- Number: US 11,306,496 B2
- Document ID: US11306496B2
- Status: Granted
- Kind: B2
- Application number: 16/472,080
- Filed: 2017-12-21
- Published: 2020-07-16
- Granted: 2022-04-19
- Earliest claimed: 2016-12-21
- Assignees: Ludwig Hettich Holding GmbH & Co. KG
- Applicants: Ludwig Hettich Holding GmbH & Co. KG
- Inventors: Ulrich Hettich
- Web page: https://patentgrep.com/patent/US11306496B2

## CPC

- E04G 23/0218: {Increasing or restoring the load-bearing capacity of building construction elements (E04G23/0203 and E04G23/0266 take precedence)}
- E04B 1/41: Connecting devices specially adapted for embedding in concrete or masonry ({joist hangers E04B1/2612; shear dowels E04B1/483;} spacers {other than masonry wall ties} for cavity walls E04B2/30, E04B2/44; connectors for reinforcing elements E04C5/16; fastening frames to the border of openings E06B1/56)
- E04C 5/10: Ducts
- E04G 21/185: {for anchoring elements or elements to be incorporated in the structure}
- E21D 21/0033: {having a jacket or outer tube}
- F16B 25/0026: {the material being a hard non-organic material, e.g. stone, concrete or drywall (F16B25/0031 takes precedence)}
- G06F 30/12: characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD
- E04G 2023/0262: {Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off}
- E04H 9/021: {Bearing, supporting or connecting constructions specially adapted for such buildings}
- F16B 5/0642: {the plates being arranged one on top of the other and in full close contact with each other}
- F16B 37/127: {and self-tapping}
- G06F 2119/14: Force analysis or force optimisation, e.g. static or dynamic forces
- E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
- E21D: SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K17/00; drilling or cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D)

## Abstract

A method is defined for attaching mounted parts on a mounting substrate formed of concrete or masonry, having a group of anchors wherein the following is true for the ratio VSd/NSd of the rated value for the transverse load VSd and of the rated value of the tensile load NSd of at least one anchor in the anchor group: VSd/NSd≥0.3, preferably VSd/NSd≥0.6 and particularly preferably VSd/NSd≥1.0, and wherein the characteristic resistances of these anchors to transverse loading VRk or to tensile loading NRk satisfy the following relationship: VRk/NRk≤1.1. The at least one anchor of the anchor group is inclined at an angle αAnker to the perpendicular to the surface of the mounting substrate in such a manner that the following is true: αAnker=k*¾*arc tan (VSd/NSd) for NSd>0, and αAnker=k*67.5° for NSd=0, where: 0.8≤k≤1.34, providing that αAnker≤75°.

## Claims

### Claim 1

A method for attaching mounted parts to a mounting substrate, having a surface, which is formed of concrete or masonry, using a group of anchors having anchor heads, said method comprising:
determining a rated value for VSd and NSd of a transverse load and tensile load respectively for each anchor within said group and a corresponding ratio VSd/NSd,
confirming that for each anchor within at least a subset of said anchors within said anchor group 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 a ratio of the 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,
mounting the anchors of said subset with their heads tilted in a direction of the corresponding rated value VSd of the transverse load by a respective 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, provided that αanchor≤75°, and
mounting further anchors of the group of anchors, if any perpendicular to the mounting substrate surface.

### Claim 2 (depends on 1)

The method according to claim 1, where the following applies 0.6<k<1.2.

### Claim 3 (depends on 1)

The method according to claim 1, where the following applies 0.85<k<1.34.

### Claim 4

A method for attaching mounted parts to a mounting substrate which is formed of concrete or masonry having a surface, using a group of anchors having anchor heads, said method comprising:
determining a rated value VSd and NSd of a transverse load and tensile load respectively for each anchor within said group and a corresponding ratio VSd/NSd, confirming that for each anchor within at least a subset of anchors within said anchor group 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 a ratio of the 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,
mounting the anchors of said subset with their heads tilted in a direction of the corresponding rated value VSd at a respective angle of inclination αanchor of between 35° and 55° to the normal to the surface of the mounting substrate, and mounting further anchors of the group of anchors, if present, perpendicular to the mounting substrate surface.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the characteristic resistances to transverse loading VRk or to tensile loading NRk, respectively for said perpendicularly mounted anchor, satisfy the following relationship:
VRk/NRk is less than or equal to 0.8.

### Claim 6 (depends on 1)

The method according to claim 1, wherein at least one anchor of said subset is guided through a bore in the mounted part, wherein the diameter of the bore exceeds the diameter of the anchor by less than 22%, in a section in which it is accommodated in the bore in the mounted state.

### Claim 7 (depends on 1)

The method according to claim 1, further including positioning of an anchor perpendicular to the surface of the mounting substrate and wherein said mounting substrate includes an edge and said anchors that are positioned at a respective angle of inclination to the normal to the surface of the mounting substrate are closer to said edge than said perpendicularly mounted anchor.

### Claim 8 (depends on 1)

The method according to claim 1, wherein said mounting substrate includes an edge and said mounted part comprises an elongate hole, wherein said method further includes positioning of an anchor in said elongate hole and perpendicular to the surface of the mounting substrate, and wherein said method comprising mounting an anchor positioned at a respective angle to the normal of the mounting substrate in a position that is further away from said edge than said perpendicularly mounted anchor in the elongate hole.

### Claim 9 (depends on 1)

The method according to claim 1, wherein a space is present between the mounted part and the mounting substrate, in which a material is located that is not pressure resistant, and for which the following applies: 1.2<k<1.34.

### Claim 10 (depends on 1)

The method according to claim 1, wherein said anchors positioned at a respective angle of inclination comprises a one-piece anchor having a leading end and trailing end, which comprises the following:
a load introduction region, which is arranged in the region of a leading end of the anchor, and which is suitable for introducing a load into the mounting substrate,
a shaft section,
a section or an element for securing the anchor to the mounted part in the region of a trailing end, and
a power drive for positioning the anchor.

### Claim 11 (depends on 1)

The method according to claim 1, wherein said anchors positioned at a respective angle of inclination comprises a two-piece system, which comprises an anchor sleeve and a clamping element,
wherein the anchor sleeve is suitable for introducing a load into the mounting substrate and has an internal thread, and
wherein the clamping element
has a shaft section including a leading end and trailing end, which, in the region of its leading end, has an external thread, by means of which it can be screwed into the internal thread of the anchor sleeve in order to transfer a load,
comprises a section or an element, for securing the shaft section of the clamping element to the mounted part in the region of a trailing end, and
has a power drive for screwing the clamping element into the anchor sleeve.

### Claim 12 (depends on 10)

The method according to claim 10, wherein said anchor heads comprise screw heads which form said power drive for screwing the clamping element into the anchor.

### Claim 13 (depends on 1)

The method according to claim 1, wherein said anchors positioned at a respective angle of inclination comprises a two-piece system, which comprises an anchor sleeve and a clamping element,
wherein the anchor sleeve is suitable for introducing a load into the mounting substrate, and
wherein the clamping element
has a shaft section including a leading end and trailing end, which, in the region of its leading end, has a stop element comprising a screw head or a screwed-on nut, against which the anchor sleeve can abut in order to transfer a load, and
comprises a section or an element for securing the shaft section of the clamping element to the mounted part in the region of a trailing end.

### Claim 14 (depends on 11)

The method according to claim 11, wherein a thread is provided on the trailing end of the anchor or of the clamping element, respectively, and the said element for securing the anchor or the clamping element, respectively, is formed by a nut, which can be screwed against the mounted part on the thread.

### Claim 15 (depends on 1)

The method according to claim 1, wherein said anchors positioned at a respective angle of inclination comprises a multi-piece system, which comprises the following:
a first anchor sleeve, which is suitable for introducing a load into the mounting substrate,
a second anchor sleeve, which is suitable for introducing a load into the mounted part, and
an elongate clamping element, which is suitable for being guided through the second anchor sleeve and for being inserted into the first anchor sleeve, or for being guided through the latter, and which is suitable for axially clamping the first and the second anchor sleeve in such a manner that the first and the second anchor sleeve generate opposed composite bond stresses in the mounting substrate or mounted part, respectively.

### Claim 16 (depends on 1)

The method of claim 1, wherein for the ratio VSd/NSd of the rated value of the transverse load VSd and the rated value of the tensile load NSd of at least one anchor in the anchor group the following applies: VSd/NSd>0.6.

### Claim 17 (depends on 16)

The method of claim 16, wherein for the ratio VSd/NSd of the rated value of the transverse load VSd and the rated value of the tensile load NSd of at least one anchor in the anchor group the following applies: VSd/NSd>1.0.

### Claim 18 (depends on 1)

The method according to claim 1, where the following applies: 0.8<k<1.34.

### Claim 19 (depends on 1)

The method according to claim 1, where the following applies: 0.6<k<1.15.

### Claim 20

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.

### Claim 21 (depends on 20)

The method according to claim 20, wherein the following applies 0.6<k<1.2.

### Claim 22 (depends on 20)

The method according to claim 20, wherein the following applies: 0.85<k<1.34.

### Claim 23 (depends on 20)

The method according to claim 20, wherein a characteristic resistance to transverse loading VRk or to tensile loading NRk, respectively, for said perpendicularly mounted anchor satisfy the following relationship:
VRk/NRk is less than or equal to 0.8.

### Claim 24 (depends on 20)

The method according to claim 20, wherein the at least one anchor is guided through a bore in the mounted part, wherein the diameter of the bore exceeds the diameter of the anchor by less than 22% in a section in which it is accommodated in the bore in the mounted state.

### Claim 25 (depends on 20)

The method according to claim 20, further including positioning of an anchor perpendicular to the surface of the mounting substrate and wherein said mounting substrate includes an edge and said anchors that are positioned at a respective angle of inclination to the normal to the surface of the mounting substrate are closer to said edge than said perpendicularly mounted anchor.

### Claim 26 (depends on 20)

The method according to claim 20, wherein said mounting substrate includes an edge and said mounted part comprises an elongate hole, wherein said method further includes positioning of an anchor in said elongate hole and perpendicular to the surface of the mounting substrate, and wherein said method comprising mounting an anchor positioned at a respective angle to the normal of the mounting substrate in a position that is further away from said edge than said perpendicularly mounted anchor in the elongate hole.

### Claim 27 (depends on 22)

The method according to claim 22, wherein a space is present between the mounted part and the mounting substrate, in which a material is located, which is not pressure-resistant, and for which the following applies: 1.1<k<1.34.

### Claim 28

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.