Crane Standard EN 1300131+A2 Limits States and proof competence of steel structure is implemented in SDC Verifier. The standard is to be used together with EN130011 and EN130012:
EN 1300131 standard deals only with the limit state method. The allowable stress method is reliable in specific cases – for cranes where all masses act only unfavorable with linear relationship between load actions and load effects.
To account for the uncertainty of fatigue strength values and possible consequences of fatigue damage – fatigue strength specific resistance factor should be specified:
Accessibility for inspection  Failsafe detail  Non failsafe detail  

Without hazards for persons ^{b}  With hazards for persons  
Detail accessible without disassembly  1,0  1,05  1,15 
Detail accessible by disassembly  1,05  1,10  1,20 
Nonaccessible detail  N/A ^{a}  1,15  1,25 
Characteristic fatigue strength (fatigue strength at 2 million cycles) and slope constant have to be defined to calculate limit design stress range:
\(\Delta \sigma _{Rd} =\frac{\Delta \sigma _{c}}{\gamma _{mf} \times \sqrt[m]{s_{m}}}\)
Where
 Δσ_{c} — Is the characteristic fatigue strength (Annex D and Annex H of standard)
 m — Is the slope constant of the log Δσ – logN curve (Annex D and Annex H of EN13001 standard)
 ϒ_{mf} — Is the fatigue strength specific resistance factor (see table above)
 s_{m} — Is the stress history parameter
Characteristic fatigue strength
Fatigue Strength Parallel to the weld:
See how SDC Verifier calculates fatigue strength parallel to the weld
Detail No. 
Δσ_{c }Δṫ_{c}  Constructional detail  Requirements 

3.7  m = 3 
Normal stress in weld direction 
Special conditions:

180  Continuous weld, quality level B  
140  Continuous weld, quality level C  
80  Intermittent weld, quality level C 
Fatigue Strength Perpendicular to the weld for welded parts:
See how SDC Verifier calculates fatigue strength perpendicular to the weld
3.9  m = 3
45 

Basic conditions:
Special conditions:
\( \sigma _{w} = F/(2\times a\times l)\) 
71  Quality level B  Stress in the loaded plate at weld toe  
63  Quality level C 
Fatigue Strength Perpendicular to the weld for nonwelded parts:
3.28 
Continuous component to which parts are welded transversally 
Basic conditions:
Special conditions:


112  Double fillet weld, quality level B*  
100  Double fillet weld, quality level B  
90  Double fillet weld, quality level C  
80  Single fillet weld, quality level B, C  
80  Partial penetration Vweld on remaining backing, quality level B, C 
Fatigue Strength Shear direction to the welds:
See how SDC Verifier calculates fatigue strength in shear direction to the weld
Detail No. 
Δσ_{c }Δṫ_{c Nmm 2}  Constructional detail  Requirements 

3.34  m = 5 
Continuous groove weld, single or double fillet weld under uniform shear flow 
Basic conditions:
Special conditions:

112  With full penetration  
90  Partial penetration 
SDC Verifier defines all fatigue strength classification
For Direct use of stress history option SDC Verifier will calculate automatically stress history for slope constant 3 and 5 and use it to calculate limit design stress range. Alternatively, user can set manually class S for different directions (parallel, perpendicular to the weld).
SDC Verifier calculate cumulative damage based on PalmgrenMiner rule:
\(\sum ^{k}_{i=1}\frac{n_{i}}{N_{i}} \ =\ C\)
Where
 n_{i} is the number of cycles accumulated at stress S_{i}
 C is the fraction of life consumed by exposure to the cycles at the different stress levels