Rothoblaas - Plates and Connectors Page 288
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PREDIMENSIONING ABACUS The abacus can be used for an initial selection of the connector to be used in each position and for each floor . In the abacus, each column refers to a different area of influence Ai of the column in question, while each row refers to a different level, the levels are numbered starting from the roof floor and going downwards . By crossing influence area and level, it is possible to determine the most suitable connector for each level . The calculation is performed with reference to a design load on the floor at the Ultimate Limit State of 8,0 kN/m2 with average load duration class (kmod=0,8) . The final selection and structural verification must be carried out in accordance with the tables shown on the following pages . Dimensioning and verification of the timber elements must be carried out separately . The colours of the various cells make it possible to determine the most suitable material for the construction of the column on which the SPIDER or PILLAR connector will be placed . In any case, a more refined calculation, as well as the choice of a different column type, can be performed in accordance with the tables on the following pages . Glulam column LVL hardwood column Steel column EXAMPLE With reference to the 5-storey building shown in the drawing and to the column highlighted, an area of influence of about 40 m2 is assumed . First of all, the connectors and columns to be used are the following: Floor Floor Floor Floor 1 2 3 4 1 SPI60S connector on glulam column SPI80S connector on glulam column SPI80M connector on glulam column Ai 2 Ai 3 Ai 4 Ai 5 SPI80L connector on glulam column Ai Floor 5 SPI100S connector on LVL hardwood column Ai L1 2 L1 L2 2 L2 Diagram of floor areas of influence . 288 | SPIDER AND PILLAR CONNECTORS | PANELS AND BUILDING JOINTS
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