Rothoblaas - Plates and Connectors Pagina 302
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STATIC VALUES | PUNCHING SHEAR AND TENSION STRESSES ON THE CONNECTOR Ft Fslab Ft PUNCHING SHEAR STRENGTH - VALUES VALID FOR ALL SPIDER MODELS tCLT with reinforcement Rslab,k without reinforcement ksus(2) ksus(2) Rslab,k [mm] [kN] 160 463 0,60 [kN] 419 0,70 180 545 0,60 494 0,70 200 627 0,60 568 0,70 220 709 0,60 642 0,70 240 791 0,60 717 0,70 280 791 0,60 717 0,70 616 0 .36 558 0 .46 160 + 160 (1) TENSILE STRENGTH - VALUES VALID FOR ALL SPIDER MODELS Upper/lower column screws Ft,k [kN] [pcs - ØxL] C24(3) GL24h(4) GL28h(5) GL32h(6) 4 VGS Ø11x250 4 VGS Ø11x400 34,60 37,32 40,38 41,54 56,20 60,65 65,64 67,49 NOTES: GENERAL PRINCIPLES: (1) The 160 + 160 configuration refers to installation with crossed CLT panels . (2) The k sus coefficient expresses the ratio between the load applied by the inclined screws by tension and the load discharged on the bottom plate by compression . • For tCLT panel thickness intermediate to those listed in the table, it is recommended to use the strength values provided for the lower thickness . (3) Values calculated according to ETA-11/0030 . A C24 solid timber column with ρ k = 350 kg/m3 has been considered in the calculation . (4) Values calculated according to ETA-11/0030 . A GL24h glulam column with ρ k = 385 kg/m3 has been considered in the calculation . (5) Values calculated according to ETA-11/0030 . A GL28h glulam column with ρ k = 425kg/m3 has been considered in the calculation . (6) Values calculated according to ETA-11/0030 . A GL32h glulam column with ρ k = 440kg/m3 has been considered in the calculation . • 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 . The γ M coefficient is the relevant safety coefficient on connections side . Rslab,d = Rt,d = Rslab,k kmod γM Rt,k kmod γM • The following expressions must be fulfilled for the verifications: Fslab,d ≤ 1,0 Rslab,d Ft,d ≤ 1,0 Rt,d • The punching shear strength of the floor (Fslab,d) includes the verification of all the SPIDER reinforcement components (reinforcement arms and screws) as well as the shear and rolling shear strength of the CLT panel in the area affected by the presence of the support . The Ultimate Limit State and the Service Limit State on the floor panels must be checked by the designer . 302 | SPIDER | PANELS AND BUILDING JOINTS
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