Lateral Torsional Buckling Check (Eurocode 3)
Calculate your steel beam's design resistance to lateral torsional buckling with this EN 1993-1-1 compliant tool.
Load schema
Results
Max shear:
-
Max moment:
-
Max displacement:
-
Support reaction left:
-
Support reaction right:
-
Cross-section class
Required class:
-
Applied class:
-
Moment capacities
Effective design moment (MEd):
- kNm
Characteristic moment resistance (MRk):
- kNm
Moment buckling resistance (Mb,Rd):
- kNm
Utilized capacity (Mb,Rd/MRk):
- %
Design check
Unity check LTB:
-
Parameters explained
| Parameter name | Symbol | Unit | Info text |
|---|---|---|---|
| Length | L | mm | Total beam length. |
| Free standing load | - | - | A free standing load is a destabilizing load. Practically meaning that if the beam moves sideways then the load can move freely with it. This is only the case if the applied load offers no resistance to lateral movement, for example a free standing brick wall. It is 'No' in case the brick wall rests on a floor, because in this case the floor resists the sideway movement. |
| C1 factor | C1 | - | Moment distribution factor C1. Default value is 1, which is a safe value and it can be manually increased. |
| C2 factor | C2 | - | Moment distribution factor C2. Default value is 0.63, which is a safe value only for loads applied to the top. For loads applied to the bottom the conservative value is C2 = 0. |
| Lateral end supports | - | - | Describes the lateral restraint conditions at the beam's end supports. |
| Lateral restraints | - | - | Describes the lateral restraint conditions along the beam's length. |
| Partial factor for stability | γM1 | - | Partial factor for stability. |
| Design bending moment | MEd | kNm | Design bending moment. |
| Characteristic moment resistance | MRk | kNm | Characteristic moment resistance. |
| Moment buckling resistance | Mb,Rd | kNm | Moment buckling resistance. |
| Unity check | UC | The ratio of the design load to the lowest design buckling resistance. A value less than or equal to 1.0 indicates that the design is acceptable under the given load. |