Steel Buildings in Europe

Part 5: Detailed Design of Trusses 5 - 35 1 z,Rd z,Ed yz b,y,Rd Ed   M M k N N 1 z,Rd z,Ed zz b,z,Rd Ed   M M k N N The interaction factors k yz and k zz are calculated according to Annex A of EN 1993-1-1, for a Class 4 section: cr,z Ed y mz yz 1 N N k C    where: cr,z Ed mz 0,79 0,21 0,36( 0,33) N N C       0,367 2,86 1,05      C mz = 0,628 0,8624 3373 1477 1 0,7952 3373 1 1477 1 1 cr,y Ed cr,y Ed y        N N N N y   0,819 4357 1 1477 0,628 0,8624 yz     k First interaction criterion (eq. 6.61) 0,926 1 34,97 0,819 2,86 1720 1477     OK cr,z Ed z mz zz 1 N k C N    where: C mz = 0,628 0,899 4357 1477 1 0,781 4357 1 1477 1 1 cr,z Ed cr,z Ed        N N N N z z  