What This Steel Screw Pull-out Calculator Helps Check
The steel screw pull-out calculator supports focused review of pull-out resistance where a screw is loaded in withdrawal from a steel supporting sheet or member. It is intended for quick engineering checks where screw geometry, thread engagement, supporting thickness, and material strength need to be assessed before carrying the result into a wider connection design.
Typical Inputs
Common inputs include the applied pull-out force, screw diameter, thread pitch, supporting sheet thickness, steel material strength, number of screws, and the relevant partial factor used by the design basis.
EN 1993 Steel Connection Context
Steel screw pull-out checks are normally reviewed as part of an EN 1993 connection workflow. The result should be considered alongside screw shear, screw tension, bearing, spacing, edge distance, local sheet behaviour, and any combined-action checks required by the project.
Thread Pitch and Supporting Sheet Thickness
Pull-out resistance is sensitive to thread pitch, screw diameter, engagement, and supporting sheet thickness. The selected values should match the actual fastener and supporting steel detail.
Result Review
The engineering tool reports resistance, utilization, and pass/fail status so the steel screw pull-out check can be reviewed clearly. The output is for preliminary engineering review and should not replace a full connection design by a qualified engineer.
Steel and Aluminium Difference
Screw pull-out in steel and screw pull-out in aluminium may look similar as a connection check, but the design basis is different. Steel pull-out is reviewed with EN 1993 assumptions, while aluminium pull-out is reviewed with EN 1999 assumptions.
Frequently Asked Questions
What is screw pull-out in steel?
Screw pull-out in steel checks whether the supporting steel sheet or member has enough resistance against a screw being pulled out under tensile withdrawal force.
What inputs are usually needed for steel screw pull-out resistance?
Typical inputs include applied pull-out force, screw diameter, thread pitch, supporting sheet thickness, steel material strength, number of screws, and the relevant partial factor.
Is screw pull-out the same as screw tension?
No. Screw tension checks the tensile resistance of the screw itself, while screw pull-out checks the resistance of the supporting steel around the engaged thread.
Is steel screw pull-out checked the same way as aluminium screw pull-out?
No. The resistance mechanism is similar, but steel checks and aluminium checks use different material assumptions and code direction.