BS EN 16758 pdf free download

BS EN 16758-2021 pdf free download.Curtain walling一Determination of the strength of shear connections – Test method and requirements.
Figure 9.d is showing the application of dead load (F1,) with half cruciform glass support (detailed view), with the positions of the displacement transducers.
It is also possible to evaluate the shear connection and the inflil support together by putting two additional displacement transducers (DT3 and DT4) under the setting block as shown in Figure 9.a, Figure 9.c. and Figure 9.d.
In the case of cruciforni infill (glass) support Figure 9.c, the displacement transducers DT 5 and DT 6 may be used to verify that the loading on the left wing has no relative influence on the right-wing deformation (asymmetric loads). The complete loading F1,,1 is transferred to the mullion and transom.
Where the glass supports are tested together with the shear connection, a dead load (F1,) should be applied to the glass support as in practice. To establish the serviceability limit state according to Annex A the deflection of the glass support should be limited to maximum 1mm measured between the two displacement transducers (DT4 and DT3).
The samples are built according to above figures, for which the following details apply:
— a=400mm1)a1=200mmanda2=200mm;
— b = 500 mm1);
— c, c4, d: dimensions of the actual loading points and typical of the construction;
Depending on the circumstances (project specifications or product’s details) sizes could be greater; see also EN 12488.
— e: the distance from the position of (a), the contact area between the internal infill gasket and the transom, and the vertical plane containing the centre of the gravity of the mull;
— g should be  50 mm in case of insulated glass’);
— S: sample restraints on the test rig (according to the respective loadings).
5.3 Loadings
5.3.1 Preloading
Prior to loading, a force of 100 N is applied, after which the displacement (DT) is reset.
5.3.2 Vertical loading
The load application device is designed in such a way that all the F1, forces shown in Figure 1 to Figure 9 are the same at ±5 %. The design static loading is specified as follows:
— minimum n = 5 connections are submitted to vertical loading until they break using a deformation speed of 2 to 5 mm/mm, the force/deformation curve is recorded;
— the design vertical load Fvdes at ULS is determined according the procedure described in Annex B.
5.3.3 Horizontal loading
5.3.3.1 General
The load application device is designed in such a way that all the Fh forces shown in Figure 1 to Figure 9 are the same at ±5 %.
Fh should be located on the transom as close as possible to the mullion which should not be more than ch < 50 mm. Depending on the actual geometry of the connection and difficulties in applying the different forces, one practical solution to have the same scheme of forces, is to apply a unique 2xFh force in the middle of the span of the transom(s), (b/2, see Figure 9).
5.3.3.2 Positive (pressure) loading
It is specified as follows:
— minimum n = 5 connections are submitted to horizontal positive loadings until they break, using a deformation speed of(2 to 5) mm/mm, the force/deformation curves are recorded;
— the design positive horizontal load Fhdes+ at ULS is determined according the procedure described in Annex B.
5.3.3.3 Negative (suction) loading
It is specified as follows:
— minimum n = 5 connections are submitted to horizontal negative loading until they break, using a deformation speed of (2 to 5) mm/mm, the force /deformation curve is recorded;
— the design negative horizontal load Fhdes. at ULS is determined according the procedure described in Annex B.BS EN 16758 pdf download.