Rothoblaas - Plates and Connectors Página 281
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STATIC VALUES CLT (5) ∑d0(6) = Rv,k kser [kN] [kN/mm] 40 [mm] 34.37 45 [mm] 37.81 49 [mm] 40.57 50 [mm] 41.26 55 [mm] 44,70 59 [mm] 47.46 60 [mm] 48.15 65 [mm] 51.59 69 [mm] 54.35 cross grain veneer (7) d0,a d0,b 17,50 d0,a d0,b d0,c 52.72 24,00 LVL softwood parallel grain veneer (8) 70.97 cross grain veneer (9) 125.71 48 .67 LVL hardwood parallel grain veneer (10) glulam (11) 116.59 68.13 25 .67 ∑d0 = d0,a + d0,b + d0,c NOTES: GENERAL PRINCIPLES: (1) • Characteristic values are consistent with EN 1995-1-1 and in accordance with ETA-19/0167 . The recommended tolerance of ±0 .5 mm is to be considered as indicative . A grooving with insufficient hslot can make it difficult to insert the connector; a grooving with excessive hslot can decrease the initial stiffness of the connection . Before cutting the first batch of panels, it is advisable to make test grooves in order to verify the quality of the grooves made by the specific machine used to cut the panels . (2) The gap between the panels must be taken into account when calculating the connector strength; refer to ETA-19/0167 for the calculation . The gap between panels may contain a filling material . (3) The connector can be installed in any position within the panel thickness . (4) For CLT e LVL with cross grain veneer, in case of installation with a1 < 480 mm or a3,t < 480 mm, the strength is reduced with a ka1 coefficient, as provided by ETA-19/0167 . ka1 = 1 - 0,001 (5) 480 - min a1 ; a3,t Values calculated according to ETA-19/0167 and valid in Service Class 1 according to EN 1995-1-1 . The following parameters were considered in the calculation: fc,0k = 24 MPa, ρ k =350 kg/m3 , tgap= 0 mm, a1 ≥ 480 mm, a3,t ≥ 480 mm . (6) The parameter ∑d 0 corresponds to the cumulative thickness of the layers parallel to Fv, inside the thickness B of the connector (see image) . (7) Values calculated according to ETA-19/0167 . The following parameters were considered in the calculation: fc,0k = 26 MPa, ρ k = 480 kg/m3 , tgap = 0 mm, a1 ≥ 480 mm, a3,t ≥ 480 mm . (8) Values calculated according to ETA-19/0167 . The following parameters were considered in the calculation: fc,0k =35 MPa, ρ k = 480kg/m3 , tgap = 0mm . (9) Values calculated according to ETA-19/0167 . The following parameters were considered in the calculation: fc,0k = 62 MPa, ρ k = 730 kg/m3 , tgap = 0 mm, a1 ≥ 480 mm, a3,t ≥ 480 mm . (10) Values calculated according to ETA-19/0167 . The following parameters were considered in the calculation: fc,0k = 57,5 MPa, ρ k = 730 kg/m3 , tgap = 0 mm . (11) Values calculated according to ETA-19/0167 and valid in Service Class 1 according to EN 1995-1-1 . The following parameters were considered in the calculation: fc,0k = 24 MPa, ρ k = 385 kg/m3 , tgap = 0 mm . • The design values are obtained from the characteristic values as follows: The coefficients γ M and kmod should be taken according to the current regulations used for the calculation . Rd = Rk kmod γM Dimensioning and verification of the timber elements must be carried out separately . • Resistance values for the fastening system are valid for the calculation examples shown in the table . For different calculation methods, the MyProject software is available free of charge (www .rothoblaas .com) . • The connector can be used for connections between glulam, CLT and LVL elements or similar glued elements . • The contact surface between the panels can be flat or "male-female" shaped, see the image in the INSTALLATION section . • A minimum of two connectors must be used within one connection . • The connectors must be inserted with the same pull-through depth (te) into both elements to be fastened . • The two inclined screws are optional and have no influence on the strength and stiffness calculation . PANELS AND BUILDING JOINTS | SLOT | 281
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