Screw calculator
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The calculator enables the verification of single and multiple screw connections based on DIN EN 1993-1-8 (Eurocode 3). All necessary data such as screw size, strength class, screw arrangement, arrangement of the holes, etc. In addition, the partial safety factors are set according to the recommendations of the Eurocode with γ M2 = 1.25 and γ M0 = 1.00. The calculated forces are used to verify the individual screw with regard to shearing, tensile failure, Embedment, punching, combination of shear / embedment / tensile failure and block failure based on Eurocode 3. |
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Format:
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| Name | Formula symbol | Value | Unit |
|---|---|---|---|
| Screw size | d | [mm] | |
| Strength class | - | [-] | |
| Type of screw head | - | ||
| Screw arrangement | - | ||
| Note | Single-tier connections for supported connections only | ||
| Arrangement of the holes according to table 3.6 | |||
| Preload permitted according to table 3.2 | - | - | [-] |
| Hole diameter | d0 | - | [mm] |
| Corner dimension | e | - | [mm] |
| Key-width | s | - | [mm] |
| Component thickness (if several then the smallest) | t(tp) | [mm] | |
| Mean value from width across corners and width across flats | dm | - | [mm] |
| Stress cross-section | As | - | [mm2] |
| Tensile strength base material | fu | [MPa] | |
| Tensile strength screw | fub | - | [MPa] |
| Yield strength screw | fyb | - | [MPa] |
| Screw forces | |||
| Axial force including a safety factor of 1.5 | Ft,Ed | [N] | |
| Shear force including safety factor 1.5 | Fv,Ed | [N] | |
| Safety factors | |||
| Partial safety factor for the resistance of cross-sections | ϒM0 | 1 | [-] |
| Resilience of screws | ϒM2 | 1.25 | [-] |
| Sliding strength in the ultimate limit state (Category C) | ϒM3,ser | 1.1 | [-] |
| Sliding strength in the serviceability limit state (Category B) | ϒM3 | 1.25 | [-] |
| Category A shear / embedment connection | |||
| Edge distance in the direction of force | e1 | [mm] | |
| Edge distance transverse to the direction of force | e2 | [mm] | |
| Distance between holes in the direction of force | p1 | [mm] | |
| Distance between holes transverse to the direction of force | p2 | [mm] | |
| Shear force coefficient | av | - | [-] |
| Coefficient | ks | - | [-] |
| Embodiment coefficient 1 | ab | - | [-] |
| Embodiment coefficient 2 | k1 | - | [-] |
| Permissible shear force | Fv,Rd | - | [N] |
| Permissible embedment force | Fb,Rd | - | [N] |
| Proof | |||
| Degree of utilization of the embedment | - | - | [%] |
| Shear force utilization rate | - | - | [%] |
| - | |||
| Category D and E tensile connection | |||
| Reduction coefficient for tension | k2 | - | [-] |
| Permissible tensile force | Ft,Rd | - | [N] |
| Permissible punching shear force | Bp,Rd | - | [N] |
| Proof | |||
| Degree of utilization of axial force | - | - | [%] |
| Punching utilization rate | - | - | [%] |
| - | |||
| Combination of shear / embedment and tension | |||
| Combined degree of utilization | - | - | [%] |
| - | |||
KONSCHA Simulation GmbH assumes no liability for the correctness, completeness, functionality and topicality of the collection of formulas, calculation programs or their results. The use of the content of the website is at the user's own risk. Liability claims are fundamentally excluded.
We are grateful for any information about any errors or improvements.
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