1

Silent

RinO® Silent ORSO® DURA® CRet® RiBA® ARBO®

Groundbreaking innovation in structure-borne sound and impact noise insulation

Extended and tested Silent product range

More performance. More value.

2

Silent – the tested product range that sets new standards in acoustics

We live in a loud world. Noise makes people ill, wears on their nerves, spoils their concentration. The need for greater peace and quiet in our private and professional lives is a legitimate aspiration. With it come higher expectations on noise insulation in buildings. The Aschwanden range of inno-vative Silent products already allows this factor to be taken into account when planning concrete structures.

3

Silent

Scientifically verified and tested at the EMPA and the Fraunhofer Institute IBPIn structural engineering, the demands on noise insula­tion are increasing steadily – on one hand through legis­lation and codes, and on the other hand from owners and principals themselves. In response, our innovative and qualitatively superior load transmission elements are being consistently optimised. Consequently, in close collaboration with institutes of the University of Applied Sciences and Arts Northwestern Switzerland FHNW and the Hochschule für Technik Rapperswil HSR, noise insulating Silent variants of our CRET shear load connec­tors, ARBO shear load elements, RIBA anchors and NELL supports have been developed. These products are the result of extensive studies of building acoustics. The acoustical properties of these new Silent elements have been analysed in over 50 test series.

In the course of testing, a variety of insulation materials were investigated at a wide range of excitation frequencies to determine their vibration and structure­borne noise damping properties – with particular regard to extended service life of the materials used. Subsequently, the acoustical properties of the elements were verified at the EMPA / Fraunhofer Institute IBP. The resulting product­specific impact noise reduction factors (Lw) are based on measurements made in realistic testing conditions. The significantly improved impact noise reduction of the Silent elements is equivalent to an audibility that is sev­eral times lower.

Outstanding qualityIn addition to their superb structural properties, the new Silent load transmission elements exhibit enhanced noise reduction characteristics. Outstanding features are the use of new, select­grade materials (PUR) and their com­pletely innovative design. As a result, they allow straight­forward and acoustically efficient insulation of structural elements.

Our quality assurance system covers materials testing, design and technical documentation of the individual products, including conformance with codes and protec­tion provisions. In production, our quality management is based on a tightly woven network of controls incorpo­rating seamless monitoring of both raw materials and semi­finished products, as well as the manufacturing processes themselves.

Customer benefits at a glance– Excellent structural and acoustically

enhanced properties – Significant impact sound reduction (Lw)– Several times lower audibility – EMPA / Fraunhofer Institute IBP tested– No arbitrary selection of data– Extensive scientific, building acoustics studies– Sound reduction quantified in one­third

octave bands– Experimental verification of strength and deflection

capacity of the acoustic elements– Minimum outlay for planning and construction work

4

Silent – optimal products for every application

CRET Silent-984, -985, -986, (-980, -981)Heavy­duty sound damping shear load connectors

CRET Silent-945 APG Sound damping shear load connectors

CRET Silent-960, -970Heavy­duty sound damping shear load connectors

ARBO Silent-700Sound damping shear load elements

NELL Silent-Isolmat Noise insulation supports

NELL SilentSound damping deformation supports

RIBA Silent-915, -917, (-912, -914) Sound damping tensile and compression anchors

5

Silent

CRET Silent shear load connectorsMovement joints prevent uncontrolled crack formation and resulting damage such as leakage and corrosion. CRET Silent connectors not only facilitate shear load transmission and deflection compatibility between adja­ cent building elements, but also the acoustic isolation of building and/or structural elements such as stairways, landings, balconies, pathways etc.

ARBO Silent shear load elementsExhibit excellent impact sound reduction and optimal thermal insulation properties. ARBO Silent shear load elements facilitate the transmission of normal and shear loads between reinforced concrete building compo­nents that are separated by sound damping joints of 60 to 200 mm width.

RIBA Silent tensile and compression anchorsFree­standing structures such as self­supporting access balconies need horizontal stabilisation. RIBA Silent anchors not only allow normal load transmission in movement joints, but also the acoustic decoupling of impact sound bridges that are created in static load­bearing joints.

NELL Silent stairway supportsThese new sound damping deformation supports with PUR and PE joint foam inlays are designed to support prefabricated stairs and reduce impact sound trans­mission between landings.

NELL Silent-Isolmat noise insulation supportNoise insulation supports for placement under structural and non­structural walls. Strips of permanently elastic and polyurethane bonded rubber granulate. Supplied in rolls.

Page Product Application

4 Silent Ideal, all­round product for any application

6 Silent Increased needs of modern society

8 Silent Production overview

10 CRET Silent-945 APG Connectors for uniaxial Sound damping shear load transmission shear load connectors with sound damping effect,

height adjustable

12 CRET Silent-960, -960P Connectors for uniaxial Sound damping heavy­duty shear load transmission and shear load connectors sound damping of cast

in­situ or prefabricated building elements

14 CRET Silent-970, -970P Connectors for uniaxial Sound damping heavy­duty shear load transmission and shear load connectors sound damping of cast

in­situ or prefabricated building elements

16 CRET Silent-984, -985, -986, Connectors for uniaxial (980, -981) shear load transmission and Sound damping heavy­duty sound damping of cast shear load connectors in­situ or prefabricated building elements

18 ARBO Silent-700 High­quality sound and Sound damping thermally insulating reinforce­ shear load elements ment elements for the support

of reinforced concrete elements that are separated by wide thermal insulation joints

20 RIBA Silent-915, -917, Sound damping elements for (-912, -914) the uniaxial transmission of Sound damping tension tension and compression forces, and compression anchors e.g. in parapets, double­walls

22 NELL Silent Deformation supports with Sound damping elevated sound damping for deformation supports the transmission of normal load, e.g. in prefabricated staircases

24 NELL Silent-Isolmat Sound damping supports Sound damping supports for structural and non­structural

walls

26 Impact noise principles Principles of the measurement and evaluation process for Silent products

28 Silent installation Installation configuration for impact noise elements

34 Aschwanden product range and services

Contents

6

Silent – increased needs of modern society

Original German text by Prof. Dr. Ing. Urs Bopp SIA/VDI and Prof. Dr. sc. math. Marcel Steiner, School of Engineering at the University of Applied Sciences and Arts Northwestern Switzerland FHNW

Thanks to ongoing advances in technology, there are a steadily increasing number of products on offer that reduce noise emission levels. At the same time, however, people are exposed to a greater diversity of sources of noise. Moreover, our modern society longs for peace and quiet. Consequently, inhabitants – owning or renting property – are ever less willing to simply accept the in trusion of noise, and are demanding better levels of protection against noise. Building owners and principals are relaying this demand to planners.

This greater need for quiet, including the more stringent requirements of building codes, is leading increasingly to improved insulation against external noise. However, with lower external noise levels comes a heightened perception of unwelcome internal noise. For this reason, not only the transmission of airborne noise from one internal room to another, but also the transmission of structure­borne and impact noise is of considerable significance.

Impact noise is generated by people walking, whereby the floor is deformed locally. Sound waves are created that propagate through the building structure and cause other structural elements to oscillate. These oscillations radiate sound waves that are audible as impact noise (see illustration of sound propagation in buildings).

Laying carpets can significantly reduce impact noise at its source. In contemporary interior design, however, carpets are not fashionable – far more popular are parquet, tiled and natural stone floors. Here, the vibration decoupling of building elements is extremely important. It allows the propagation of structure­borne and impact noise to be reduced and – depending on the acoustic quality of the isolation – the radiated structure­borne noise to be significantly lowered or even eliminated completely.

In addition to the selection of high quality products, the professional installation and application of these products are crucial. Unlike other physical processes such as heat transmission, even the smallest structure­borne sound bridge can significantly reduce the impact noise insulation effect, or at worst, cancel it entirely. This is because even a modest amount of energy is sufficient to acoustically excite building elements. There is no need for extensive transmission points; the existence of a small, rigid bridge is enough to trigger the effect.

To avoid creating structure­borne sound bridges during construction work, installation instructions are available for every type of Silent element.

7

SilentSilent

Sound propagation in buildings

Internal noise

Impact sound

External noise

8

CRET Silent for cast in-situ concrete

Type Joint gap Load (FRd) Lw Impact sound reduction Standard Special* [mm] [kN] [dB]

CRET Silent-960 20 – 60 30.9 – 24.4 22 ●

CRET Silent-970 20 – 60 26.1 – 19.9 28 ●

CRET Silent-984 10 – 60 25.5 – 15.6 30 ●

CRET Silent-985 10 – 60 55.6 – 37.5 30 ●

CRET Silent-986 10 – 60 79.7 – 60.0 23 ●

CRET Silent-980 10 – 60 22.0 –16.0 39 ●

CRET Silent-981 10 – 60 30.0 39 ●

* Special products: made to order

Production overview

CRET Silent for prefabrications

Type Joint gap Load (FRd) Lw Impact sound reduction Standard [mm] [kN] [dB]

CRET Silent-960 P 20 – 60 30.9 – 24.4 22 ●

CRET Silent-970 P 20 – 60 26.1 – 19.9 28 ●

CRET Silent-945 APG 10 – 50 22.0 – 16.5 35 ●

RIBA Silent

Type Max. Load under Load area under Load area under Lw Impact Standard Special* joint gap tension compression (ele­ compression (ele­ sound (FRd) ment restrained ment restrained reduction in transverse not in transverse direction) (FRd) direction (FRd) [mm] [kN] [kN] [kN] [dB]

RIBA Silent-915 40 – 200 23.1 25.0 – 23.2 25.0 – 22.5 33 ●

RIBA Silent-917 40 – 200 62.8 62.8 62.8 – 57.9 33 ●

RIBA Silent-912 40 – 200 21.8 21.8 21.8 – 9.7 39 ●

RIBA Silent-914 40 – 200 21.8 21.8 21.8 – 17.3 39 ●

* Special products: made to order

ARBO Silent

Type Joint gap Lw Impact sound reduction Standard [mm] [dB]

CRET Silent-960 P 60 –160 16 ●

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Silent

NELL Silent

Type Standard Load (FRd) Lw Impact sound reduction Standard support length [mm] [kN] [dB]

NELL Silent-Z 2.18 1250 25.2 39 ●

NELL Silent-Z 3.27 1250 37.8 39 ●

NELL Silent-Z 4.36 1250 50.4 39 ●

NELL Silent-L 2.18 1250 25.2 39 ●

NELL Silent-L 3.27 1250 37.8 39 ●

NELL Silent-L 4.36 1250 50.4 39 ●

NELL Silent-F 2.18 1250 25.2 39 ●

NELL Silent-F 3.27 1250 37.8 39 ●

NELL Silent-F 4.36 1250 50.4 39 ●

NELL Silent-W 2000 Designed 39 ● as spacer

Customised models made to order. See specific product documentation for details, or check our website www.aschwanden.com.

NELL Silent-Isolmat

Type Load Support width Support width Support width Support width Lw Impact Standard 125 mm 150 mm 175 mm 200 mm sound reduction [N/mm2] Fadm [kN/m1] Fadm [kN/m1] Fadm [kN/m1] Fadm [kN/m1] [dB]

NELL Silent-Isolmat 0.250 31.25 37.50 43.75 50.00 28 ●

0.375 46.88 56.25 65.63 75.00 28 ●

0.500 62.50 75.00 87.50 100.00 28 ●

10

Lw = 35 dB

Sound damping shear load connector

CRET Silent-945 APG

FunctionUniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of pre­fabricated building elements such as stairways, landings, balconies, access pathways etc.

The thread is height adjustable over a range of approxi­mately 0 to 12 mm. This allows adjustment of prefabricated elements.

From the EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for CRET Silent­945 APG connectors:

Sleeve Dowel APG

11

AlleMasse in mm

Revidiert:

F.J .Asc h w and en AG

C H -32 50 Ly ss

Tel. 0 32 /3 87 9 5 95

Fax . 032 /3 87 9 5 99

Mst:

Gez:Datum: 08.1 2.20 09

1:10B e m ess ung s r ege ln

TEC BJMU

h

h

aRaD

ff

e

F

hmin = 160 mme = f + f

aD,min = 350 mm aR, min = aD, min

2

Measurement results of impact sound reduction (one-third octave bands)The results of the EMPA measurements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the configuration with the CRET Silent­945 APG connector, based on a rigid landing.

Impact sound reduction CRET Silent­945 APG

System diagram

Load tableConcrete C20/25 Joint v [mm] Load FRd [kN]

e 50 mm 3.2 22.0

e 50 mm 2.0 16.5

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

3150

0

60

50

40

10

30

20

13.2 13.6

22.824.6

28.9

20.1 20.9

34.5

35.1

35.8

31.7

36.9

35.0

39.9

37.5

40.7

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Validity of strength figures according to GTC

12

CRET Silent­960 CRET Silent­960P

Lw = 22 dB

CRET Silent­960 for cast in­situ building elements

CRET Silent­960P for prefabricated building elements

▼F e = f + f

f fe

CRET Silent­960P

CRET Silent­960

Heavy-duty shear load connectors with sound insulation

CRET Silent-960, -960P

FunctionUniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in­situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc.

From the EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for CRET Silent­960 and ­960P connectors:

Concrete C20/25 Joint ( f e) FRd [kN]

Joint ( f 45 mm) FRd [kN]

e 20 mm 30.9 e 45 mm 26.6

e 25 mm 29.9 e 50 mm 25.9

e 30 mm 29.1 e 55 mm 25.1

e 35 mm 28.2 e 60 mm 24.4

e 40 mm 27.4

Load table

Standard dowel length: 420 mmFRd = Design value

of dowel strength

Validity of strength figures according to GTC

13

aR, min =aD, min

2

aR aD

h

In slabs, distance to edge aR and distance between con­nectors aD should not fall below the following minimum values:

aD, min for slabs without shear reinforcement

Minimal structural element dimensionsWith centric installation of the dowel, minimum slab thickness is 180 mm.

Distance between connectors

Concrete C20/25 Joint

Slab h [mm] 180

200

220

240

260

aD, min minimum distance between connectors [mm]

e 20 mm 300 280 260 240 220

e 40 mm 270 250 230 210 200

e 60 mm 240 220 200 190 180

Impact sound reduction CRET Silent­960

­10

50

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

40

30

0

20

10

3150

7.9

–4.1

19.8

–6.3

1.3

7.89.8

2.9

12.6

10.5 10.7

12.6 12.6 19.0

23.2

14.4

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Measurement results of impact sound reduction (one-third octave bands)The results of the EMPA measurements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the configuration with CRET Silent­960 and ­960P elements, based on a rigid landing.

14

CRET Silent­970 CRET Silent­970P

Lw = 28 dB

▼F e = f + f

f fe

CRET Silent­970 for cast in­situ building elements

CRET Silent­970P for prefabricated building elements

CRET Silent­970P

CRET Silent­970

Heavy-duty shear load connectors with sound insulation

CRET Silent-970, -970P

FunctionUniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in­situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc.

From the EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for CRET Silent­970 and ­970P connectors:

Concrete C20/25 Joint ( f e) FRd [kN]

Joint ( f 45 mm) FRd [kN]

e 20 mm 26.1 e 45 mm 22.0

e 25 mm 25.2 e 50 mm 21.3

e 30 mm 24.3 e 55 mm 20.6

e 35 mm 23.5 e 60 mm 19.9

e 40 mm 22.7

Load table

Standard dowel length: 420 mmFRd = Design value of dowel

strength

Validity of strength figures according to GTC

15

aR, min =aD, min

2

h

aR aD

Minimal structural element dimensionsWith centric installation of the dowel, minimum slab thickness is 180 mm.

Measurement results of impact sound reduction (one-third octave bands)The results of the EMPA measurements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the configuration with CRET Silent­970 and ­970P elements, based on a rigid landing.

Impact sound reduction CRET Silent­970

Distance between connectors

In slabs, distance to edge aR and distance between con­nectors aD should not fall below the following minimum values:

aD, min for slabs without shear reinforcement

Concrete C20/25 Joint

Slab h [mm] 180

200

220

240

260

aD, min minimum distance between connectors [mm]

e 20 mm 260 230 220 200 190

e 40 mm 220 200 190 180 180

e 60 mm 200 180 180 180 180

­10

50

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

40

30

0

20

10

3150

8.6

2.3

21.2

–3.2

2.8

17.7

16.412.3

19.222.0

20.2 20.1

22.2

24.2

26.122.6

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

16

CRET Silent­984 Lw = 30 dBCRET Silent­985 Lw = 30 dBCRET Silent­986 Lw = 23 dB

CRET Silent­980 CRET Silent­981CRET Silent­984 CRET Silent­985 CRET Silent­986

CRET Silent­980 Lw = 39 dBCRET Silent­981 Lw = 39 dB

h

F

f fee = f + f aD aR

Heavy-duty shear load connectors with sound insulation

CRET Silent-984, -985, -986, (-980, -981)

FunctionUniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in­situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc.

From the Fraunhofer Institute IBP / EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for CRET Silent connectors:

System diagram

17

Measurement results of impact sound reduction (one-third octave bands)The results of the Fraunhofer Institute IBP / EMPA meas­urements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the configuration with CRET Silent­984, ­985, ­986, (­980, ­981) elements, based on a rigid landing.

Impact sound reduction CRET Silent­984, ­985, ­986, (­980, ­981)

Load table

CRET Silent­980, ­981

CRET Silent­984, ­985CRET Silent­986

0

­10

60

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

50

40

10

30

20

3150

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Type e FRd [mm] [kN]

CRET Silent-984-10 10 25.5

CRET Silent-984-20 20 25.5

CRET Silent-984-30 30 22.3

CRET Silent-984-40 40 19.5

CRET Silent-984-50 50 17.4

CRET Silent-984-60 60 15.6

CRET Silent-985-10 10 55.6

CRET Silent-985-20 20 55.6

CRET Silent-985-30 30 53.6

CRET Silent-985-40 40 46.9

CRET Silent-985-50 50 41.7

CRET Silent-985-60 60 37.5

CRET Silent-986-10 10 79.7

CRET Silent-986-20 20 79.7

CRET Silent-986-30 30 79.7

CRET Silent-986-40 40 75.0

CRET Silent-986-50 50 66.7

CRET Silent-986-60 60 60.0

Type e FRd [mm] [kN]

CRET Silent-980-10* 10 22.0

CRET Silent-980-20* 20 22.0

CRET Silent-980-30* 30 22.0

CRET Silent-980-40* 40 20.2

CRET Silent-980-50* 50 17.9

CRET Silent-980-60* 60 16.0

CRET Silent-981-10* 10 30.0

CRET Silent-981-20* 20 30.0

CRET Silent-981-30* 30 30.0

CRET Silent-981-40* 40 30.0

CRET Silent-981-50* 50 30.0

CRET Silent-981-60* 60 30.0

The individual one­third octave band results are shown in the product documentation CRET Silent­984, ­985, ­986, (­980, ­981) available in German and French.

* Special products: made to order

Validity of strength figures according to GTC

e

v

Q Q

H

18

Lw = 16 dB

ARBO Silent­700

Fire protectionThe 30 mm concrete underside covering meets the requirements of fire resistance class R90 to SIA 262. A mineral wool thermal insulation panel is inserted in the underside of the insulation element for the fire protection range up to 750°C.

Behaviour under loadARBO Silent­700 series elements transfer normal and shear loads between reinforced concrete building components that are separated by insulation gaps of 60 to 160 mm width.

Sound and thermally insulating shear load element

ARBO Silent-700

FunctionHigh­quality sound and thermally insulating console element for the support of reinforced concrete com­ponents that are separated by wide thermal insulation joints.

From the EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for ARBO Silent­700 console elements:

n (Tensile or compression)

Rint = 0.35 m2 · K / W Tint = +20°C

Rint = 0.25 m2 · K / W Tint = +20°C

Rext = 0.04 m2 · K / W Text = –10°C

e [mm] a [mm]

(a, e) = + · exp (– 0.003360 · e)132.69 (e + 20.09)2

59.44 a0.96

[W/(m·K)]

21

2

3

2

1 1

3 3

­10

50

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

40

30

0

20

1031

5013.4

17.1

8.86.8

9.8

5.5

17.9

13.6

15.6

16.6

19.3

14.4

15.1

15.6

23.5

11.4

e [mm]

[W

/(m

·K)]

0.10

0.15

0.20

0.30

0.05

060 80 100 120 140 160 180 200

0.251

2

3

4

56

7

a = 250 m

a = 350 m

a = 500 m

a = 750 m

1

2

3

4

a = 1000 m

a = 1500 m

a = 2000 m5

6

7

19

Measurement results of impact sound reduction (one-third octave bands)The results of the EMPA measurements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the con figuration with ARBO Silent­700 console elements, based on a rigid landing.

Length related thermal transmission coefficient of ARBO Silent-700 elements – data sheetNumerical values for can either be read off the two tables, or – within the illustrated ranges of a and e – calculated using the formula.

Continuous slab ARBO Silent­700 with centreline distance a = 450 mm

Results of thermal transmissionThe illustrations show the significantly more favour ­ able surface temperatures of the ARBO Silent element. Also discernible is the critical zone on the inner edge (slab underside), whereby in the case of the ARBO Silent element, this can be localised, but the deviations are in a magnitude of only 0.1°C.

Formula for calculating thermal transmission

Impact sound reduction ARBO Silent­700 Curves for identical distance between centrelines (a)

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

20

Bolted tension and compression anchors with sound insulation

RIBA Silent-915, -917, (-912, -914)

FunctionUniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced anchorage of building elements such as parapets, double walls, stabilisation of free­standing balconies and access pathways etc.

From the Fraunhofer Institute IBP / EMPA measurements for evaluation of impact sound reduction Lw compared to a rigid landing, the following value was derived for RIBA Silent:

Model A Model B Model C

RIBA Silent­915 Lw = 33 dB RIBA Silent­917 Lw = 33 dB

Box

RIBA Silent­912 Lw = 39 dB RIBA Silent­914 Lw = 39 dB

RIBA Silent­912, ­914

RIBA Silent­915RIBA Silent­917

21

Impact sound reduction RIBA Silent­915, ­917, (­912, ­914)

Measurement results of impact sound reduction (one-third octave bands)The results of the Fraunhof IBP / EMPA measurements are shown in the graph below as one­third octave values for impact sound reduction L = Ln,r,0 – Ln,r of the configu­ration with RIBA Silent elements, based on a rigid landing.

0

­10

60

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

50

40

10

30

20

3150

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Load table

Type Tensile and Max. Tensile force Compression force Compression force compression Joint gap (FRd) (Building element (Building element anchors restrained in not restrained in the transverse the transverse direction (FRd) direction) (FRd) [mm] [mm] [kN] [kN] [kN]

RIBA Silent-915-10 10 40 23.1 23.2 23.2

RIBA Silent-915-12 12 80 23.1 25.0 25.0 12 120 23.1 25.0 22.5

RIBA Silent-915-14 14 160 23.1 25.0 25.0

RIBA Silent-915-16 16 200 23.1 25.0 25.0

RIBA Silent-917-16 16 40 62.8 62.8 62.8 16 80 62.8 62.8 62.8 16 120 62.8 62.8 57.9

RIBA Silent-917-20 20 160 62.8 62.8 62.8 20 200 62.8 62.8 62.4

RIBA Silent-912-12* 12 40 21.8 21.8 21.8 12 80 21.8 21.8 21.8 12 120 21.8 21.8 21.8 12 160 21.8 21.8 14.3 12 200 21.8 21.8 9.7

RIBA Silent-914-14* 14 40 21.8 21.8 21.8 14 80 21.8 21.8 21.8 14 120 21.8 21.8 21.8 14 160 21.8 21.8 21.8 14 200 21.8 21.8 17.3

Validity of strength figures according to GTC * Special products: made to order

The individual one­third octave band results are shown in the product documentation RIBA Silent­915, ­917, (­912, ­914) available in German and French.

22

NELL Silent­Z NELL Silent­L NELL Silent­F NELL Silent­W

Lw = 39 dB

Stairway support with sound insulation

NELL Silent

FunctionTransmission of normal forces; sound reduced effect. Typical applications: sound insulating support of prefabri­cated stairs.

From the results of the EMPA measurements for the evaluated impact sound reduction Lw, the following value was derived for CRET Silent­980, based on a rigid landing:

As the materials used for the NELL Silent stairway supports are the same as those of the CRET Silent­980 shear load connectors, the same impact sound reduction Lw = 39 dB can be assumed, particularly as the insula­tion elements of the stairway supports are not enclosed in sleeves in the way that the shear load dowels are.

23

D

DD = 10 mm

D

B

L

C

C

A

B

L

AD

E

E = 150 mm

E

D

DD = 10 mm

D

B

L

C

C

A

B

L

AD

E

E = 150 mm

E

D

DD = 10 mm

D

L

B

L

AD

C

C

A

B

E

E = 150 mm

E

Impact sound reduction CRET Silent­980

Measurement results of impact sound reduction (one-third octave bands)Results of EMPA measurements: impact sound reduction of a CRET Silent­980 shear load connector, comparable with a NELL Silent stairway support.

Load table

Model Standard support length [mm]

Permissible load Fadm [kN]

Load FRd [kN]

Deflection v [mm]

NELL Silent­Z 2.18 1250 18.0 25.2 1.6

NELL Silent­L 2.18 1250 18.0 25.2 1.6

NELL Silent­F 2.18 1250 18.0 25.2 1.6

NELL Silent­W 2000 Load: structural spacer

Model Standard support length [mm]

Permissible load Fadm [kN]

Load FRd [kN]

Deflection v [mm]

NELL Silent­Z 3.27 1250 27.0 37.8 1.6

NELL Silent­L 3.27 1250 27.0 37.8 1.6

NELL Silent­F 3.27 1250 27.0 37.8 1.6

NELL Silent­W 2000 Load: structural spacer

Model Standard support length [mm]

Permissible load Fadm [kN]

Load FRd [kN]

Deflection v [mm]

NELL Silent­Z 4.36 1250 36.0 50.4 1.6

NELL Silent­L 4.36 1250 36.0 50.4 1.6

NELL Silent­F 4.36 1250 36.0 50.4 1.6

NELL Silent­W 2000 Load: structural spacer

0

60

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

50

40

10

30

20

3150

13.5

18.924.0

20.2

28.8

22.3

28.1

27.9 28.2

30.0

24.4

31.1

43.3

50.4

45.1

50.8

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Validity of strength figures according to GTC

24

NELL Silent­Isolmat

NELL Silent­Isolmat

Noise insulation support

NELL Silent-Isolmat

FunctionNELL Silent­Isolmat is a noise insulation support placed under structural and non­structural walls, made of per­manently elastic, polyurethane­bonded rubber granulate with adequate ageing properties, temperature resistant between ­20°C and +80°C, water resistant. The evaluated impact sound reduction is comparable to that of the CRET Silent­970 shear load connector, i.e.:

Using structure­borne sound and vibration measure­ments undertaken in the laboratory of the FHNW, insula­tion properties were determined for NELL Silent­Isolmat noise insulation supports that are similar to the insulation material used in the CRET Silent­970 shear load con­nectors. For this reason, comparable sound reduction levels may be assumed.

Lw = 28 dB

25

Thickness h = 5 mm: Load [N/mm2]

Support widths: 125 mm Fadm [kN/m1]

150 mm Fadm [kN/m1]

175 mm Fadm [kN/m1]

200 mm Fadm [kN/m1]

Deflection (short­term value): % in von h mm

0.250 31.25 37.50 43.75 50.00 16% 0.80

0.375 46.88 56.25 65.63 75.00 20% 1.00

0.500 62.50 75.00 87.50 100.00 24% 1.20

Measurement results of impact sound reduction (one-third octave bands)The impact sound reduction levels achieved with NELL Silent­Isolmat are comparable with those shown in the graphic for CRET Silent­970.

Impact sound reduction CRET Silent­970

­10

50

100

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

40

30

0

20

10

3150

8.6

2.3

21.2

–3.2

2.8

17.7

16.4 12.3

19.222.0

20.2 20.1

22.224.2

26.122.6

One­third octave frequency [Hz]

Impa

ct s

ound

red

uctio

n

L [d

B]

Validity of strength figures according to GTC

26

Realistic tests at the Fraunhofer Institute for Buildings Physics IBP and the EMPAThe test rig concept allows original Silent elements to be tested realistically in the installed condition. The test chamber is isolated from the rest of the building so that bypass paths can be excluded. This test set­up comes very close to a true installed situation.

The concrete slab in the transmission chamber is excited using a standard tapping machine. The reference instal­lation is a rigidly built in landing slab.

EMPA Reports on Findings:CRET Silent­945 APG Nr. 454317CRET Silent­960, ­970 Nr. 149285/2 CRET Silent­980, ­981 Nr. 446465ARBO Silent­700 Nr. 172809 RIBA Silent­912 Nr. 446465

Fraunhofer Institute IBP Reports on Findings: CRET Silent­985 P­BA 9/2014 CRET Silent­986 P­BA 11/2014 RIBA Silent­915 P­BA 12/2014 RIBA Silent­917 P­BA 13/2014

Measurement and evaluation procedureFor testing purposes at the EMPA / Fraunhofer Institute IBP, a measurement procedure based on the standard for ceiling constructions (SN EN ISO 140­8:1997 (SIA 181.008) or DIN EN ISO 10140) was used because currently, there is no international test procedure for landing or stair sup­ports. This standards regulate impact sound measure­ment, for example with floating floor treatment.

One­third octave band measurements were conducted in the reception area for:(a) Impact sound pressure level Ln,r,0 of the structure with

a rigid slab (= reference measurement).(b) The corresponding value Ln,r of the slab connected

by a Silent series product (= measurement with sound damping measure).

The sound damping effect in the individual one­third octave bands is given by the resultant difference:

Evaluated impact sound reduction LwFor simplified characterisation of sound insulating ele­ ments a single value is often required rather than the impact sound reduction of all 16 one­third octave bands.

Because there is currently no international test procedure for landing and stairway supports, this single figure for the Silent elements has been stated in the form of an evaluated impact sound reduction Lw to EN ISO 717­2. This procedure can be readily applied to the case under review. It has also be confirmed by other investigations (E. Taskan, et al. Proposal for a Mathematical Model for Predicting Impact Sound Transmission in Decoupled Solid Stairways. Symposium documents, DAGA 2010, Berlin).

According to EN ISO 717­2 the impact sound Ln,r, or Ln,r,0 curve plotted from the above measurements in the 100 Hz to 3150 Hz frequency bandwidth is compared against a reference curve (see Evaluated Normal Impact Sound Pressure Level). The reference curve is vertically offset in increments of 1 dB until the sum of the differences between the impact sound pressure level and the refer­ence curve in the one­third octaves in which the impact sound pressure levels are higher than the reference curve is less than 32 dB. The level value of the offset reference curve at 500 Hz is then equivalent to the evaluated stand­ard impact sound level Ln,r,w or Ln,r,0,w of the reference measurement.

The evaluated impact sound reduction is then given by:

Measurement and evaluation procedure for Silent products

L = Ln,r,0 - Ln,r

Lw = Ln,r,O,w – Ln,r,w

27

Silent

50

60

7010

0

125

160

250

400

500

200

315

630

800

1000

1250

1600

2000

2500

40

30

0

20

10

3150

One­third octave frequency [Hz]

Eval

uate

d st

anda

rd im

pact

sou

nd le

vel L

n,r [

dB]

Measured impact sound level Ln,r

Reference curve

Offset reference curve

Evaluated standard impact sound level

Evaluated standard impact sound level

Acoustic chamber (acoustically isolated from main building)

Acoustic insulation

Transmission chamber

Elastic support

Tapping machineLoad

Measurement configuration at the EMPA / Fraunhofer Institute IBP

28

CRET Silent-984, -985, -986, (-980, -981)

Installation of impact sound elements

1. Nail CRET sleeve to the shuttering.

3. Insert the CRET dowel.

2. Remove shuttering and nails, apply max. 100 kg/m3

mineral wool filler material.

4. Mask the dowel plate and filler material joints.

29

CRET Silent-960, -970

Silent

1. Nail CRET sleeve to the shuttering.

3. Insert the CRET dowel.

2. Remove shuttering and nails, apply max. 100 kg/m3

mineral wool filler material.

4. Mask the dowel plate and filler material joints.

30

CRET Silent-945 APG

Installation of impact sound elements

1. Nail CRET sleeve to the shuttering.

3. Mask the dowel plate and filler material joints. No need for masking if precast concrete elements are used.

2. Remove shuttering and nails, apply max. 100 kg/m3 mineral wool filler material, insert the CRET dowel.

4. Install the precast element and use the dowel plate for fine adjustment.

31

RIBA Silent-915, -917, (-912, -914)

Silent

1. Nail RIBA sleeve to the shuttering.

3. Screw in the anchor.

2. Remove shuttering and nails, apply max. 100 kg/m3

mineral wool filler material.

4. Mask the anchor and filler material joints.

32

ARBO Silent-700

Installation of impact sound elements

1. Place the ARBO Silent element on the shuttering.

3. Cast the first slab and mask it against the second casting phase.

2. Join up insulation material max. 100 kg/m3 mineral wool and mask it against the first casting phase.

4. Cast the second slab.

33

34

Punching shear and shear reinforcement for significantly enhanced design strength in areas subject to punching shear and shear conditions.

Steel shear heads system for assimilating shear and flexural load in slab support zones.

Shear load connectors for the design of high­quality shear load transmission and anchorage of movement joints.

CRet®

Cantilever slab connectors with excellent thermal insulation of thermally isolated concrete slabs.

ARBO®

Aschwanden product range and services

Anchors made of stainless steel provide optimal safety in the transmission of tensile and compression forces between two separate reinforced concrete elements; also for anchoring balustrades, piles etc.

RiBA®

Sound damping elements available from four proven product lines: CRET Silent shear load elements, ARBO Silent cantilever slab elements, RIBA Silent tensile and compression anchors, and NELL Silent supports.

Silent

DURA® DURA®

35

ORSO-V Steel / Concrete composite columns and ORSO-B concrete columns meeting the highest static and aesthetic requirements.

ORSO®

Movement and deformation supports for linear and localised support conditions.

nell®

Exo Externally fitted, prestressed steel shear head for retroactive enhancement of punching shear strength in existing slabs.

RinO®

Carbo-S Prestressed carbon fibre reinforced straps for retroactive enhancement of punching shear strength in existing slabs.

RinO®

Flex Carbon fibre reinforced laminate for retroactive enhancement of flexural strength in existing slabs.

Engineering Services Our engineers will help you with static tasks and support you in generating customised solutions using proven static design tools. They are thoroughly familiar with our technical products and services, and will be glad to assist you with your specific design situations. Our design programs are based on current SIA codes, greatly simplifying the use of Aschwanden engineering product range.

RinO®

3.2014 Copyright © by F.J. Aschwanden AG CH­3250 Lyss Switzerland Phone 032 387 95 95 Fax 032 387 95 99 E­Mail info@aschwanden.com www.aschwanden.com

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Remarks on this documentAs a result of updated standards and ongoing development of our product range, Aschwanden documentation is subject to change without notice. The currently valid version of this printed document can be found on our website.

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