Rothoblaas - Plates and Connectors Page 306
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NOTES: GENERAL PRINCIPLES: (1) The coefficient γ M0 corresponds to the partial coefficient for steel S355 sections strength and it should be taken according to the current regulations used for the calculation . For example, according to EN 1995-1-1 it is to be considered as 1,00 . • The design values on timber side can be obtained from the characteristic values as follows . The coefficients γ MT and kmod should be taken according to the current regulations used for the calculation . The coefficient γ MT is the relevant safety coefficient of timber . (2) The coefficient γ M0* corresponds to the partial coefficient for steels section strength not covered by EN 1993-1-1 . This should be taken according to the current regulations used for the calculation . In the absence of normative indications, it is recommended to use a value γ M0* = 1,10 . Rtimber,up,d = The SPIDER connector model in question is optimized for use with GL32h glulam columns . Materials of inferior characteristics may be used; in this case, the metal components of the connector will be oversized . Rtimber,down,d = (3) (4) (5) (6) The SPIDER connector model in question is optimized for use with LVL GL75 timber columns in accordance with ETA-14/0354 . Materials of inferior characteristics may be used; in this case, the metal components of the connector will be oversized . For safety reasons, the strength is calculated using a k steel coefficient valid for timber columns C24 . The same value can be used for GL24h, GL28h and GL32h columns . The strength is calculated using a k steel coefficient valid for GL32h timber columns . If other materials are used for columns, the strength must be calculated with reference to ETA-19/0700 . (7) The strength is calculated using a k steel coefficient valid for GL75 timber columns . If other materials are used for columns, the strength must be calculated with reference to ETA-19/0700 . (8) The compressive strength of the cylinder has been calculated for a panel height of 320 mm . In all other cases, the same value can be used for safety purposes . (9) (10) The connector is supplied without top plate . The steel column can be connected directly to the SPIDER connector through 4 M12 bolts . The top column must be equipped with a plate, dimensioned by the designer, suitable to transfer the load to the SPIDER connector . The bottom plate of the SPIDER connector is not dimensioned to spread the load on the lower steel column . This must be equipped with a plate, dimensioned by the designer, suitable to receive the load from the SPIDER connector . Rtimber,up,k kmod γMT Rtimber,down,k kmod γMT • The design values on steel side can be obtained from the characteristic values as follows . The coefficients γsteel should be taken according to the current regulations used for the calculation (see notes 1 and 2) . Rtp,d = Rtp,k γsteel Rlt,d = Rlt,k γsteel Rb,d = Rb,k γsteel Rbp,d = Rbp,k γsteel • The following expressions must be fulfilled for the verifications: Fco,up,d { min Rtimber,up,d ;Rtp,d ;Rlt,d Fco,up,d + ksus Fslab,d { min Rb,d ;Rbp,d Fco,up,d + Fslab,d } } ≤ 1,0 ≤ 1,0 ≤ 1,0 Rtimber,down,d • The checks on the column side refer to the compressive strength parallel to the fiber, at the SPIDER connector . Column instability must be verified separately . 306 | SPIDER | PANELS AND BUILDING JOINTS
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