112 
Appendices 
rapolatethe stresses from FE calculations. When parametric equations, e. g. as developed by 
Efthymiou, are used, it is necessary to ensure that the geometric boundary conditions are pre 
cisely adhered to, an FE calculation should be preferred in cases of doubt. 
The above-stated notes for nodes of hollow sections shall apply similarly to other constructio 
nal details. 
The structural stress concepts can be used only for a seam which is welded on both sides. An 
application shall be made to the appointed inspector to use single-sided welds at nodes of 
hollow sections in an individual case and the procedure shall be agreed. Depending on the 
stress state and the possibility of carrying out non-destructive tests, consideration can also 
be given to using the structural stress concept for single-sided welds. 
Appendix 5-V Application notes for DIN EN 1993-1-10 - choice of steel grades 
5-V.1 Material standards and ordering 
The steels to be used shall always be ordered according to the steel grades listed in DIN EN 
1993-1-1 [5] Table 3.1 and corresponding material standards. 
If the steel grade selected in accordance with DIN 1993-1-10 [7] is outside the regulated 
range, for example when greater metal sheet thicknesses are used and/or at low service tem 
peratures, additional steel grades and the associated material standards shall be used. In this 
case, the use of steels in accordance with DIN EN 10225 [12] is permissible. Since the steels 
in accordance with DIN EN 10225 [12] are semi-finished products which are not part of the 
Building Rules List, the quality and test specifications of DIN EN 10025-1 ,-3,-4 for sheet steel 
and DIN EN 10210-1 for hot-formed hollow sections shall be used if they contain more strin 
gent requirements than DIN EN 10225. Steels of group 1 in accordance with DIN EN 10225 
are excluded from this. 
For all products which are predominantly stressed when not at rest, acceptance test certifica 
tes 3.2 in accordance with DIN EN 10204 [9] shall be available for each melt with the following 
additional information: 
• 15 element analysis (chemical composition) - concentration of C, Mn, Si, S, R Al, N, Cu, Cr, 
Nb, V, Ti, Mo, Ni, B 
• AR state not permissible under dynamic load 
• Marking of the authorised approval inspector 
A permanent stamp is not permissible in dynamically loaded components. 
5-V.2 Selection of steel grades paying due heed to fracture toughness 
The regulations according to [7] Section 2 may be applied when selecting steel grades in ac 
cordance with standards [8], [10] to [12]. 
The following design situations must be considered: 
E d i = E {A|T Ed ] „+“ IG k „+“ Q Ek } and E d2 = E {A[T Ed ] „+“ IG k „+“ A k } 
The leading action A represents the effect of the reference temperature T Ed . IG k is the sum of 
the permanent actions. QEk is the combined action from the ambient conditions, such as 
swell, wind and sea ice, with a cycle of 50 years. A k is the action from the planned docking 
impact of a supply ship.