The current steelwork standards (DIN 18800-1 [55] and/or DIN EN 1993-1-1 [56]) with the new partial safety factor have only been reflected in KTA rules [14] for steel structures to a limited extent to date: so KTA status report KTA-GS-78 [51] advises relating steelwork load cases H, HZ, HS1, HS2 and HS3, and requirement categories A1, A2 and A3 (cf. Table 6.4).

How steelwork structures are designed depends on which KTA rule is to be used for the structure in question: so verifications may be required either by the global safety concept or the partial safety concept.

Fundamentally, the design procedures in DIN 18800-1 may be used (Table 6.5). Stability verifications must also be considered here, such that either with beam structures the limits of slenderness must be observed in all cross-sections, or with plates and shell structures buckling safety must be verified to DIN 18800-3 [57] or DIN 18800-4 [58].

The plastic-plastic design procedure, as shown in Table 6.5, reflects the plastic hinge analysis as a simplified method. More precise design procedures, such as using non­linear calculation methods reflecting realistic steel material laws, may also be used. When using plastic cross-section or system reserves, the design criteria in Table 6.5 must be observed.