VitraLab Steel Bearing Tool

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1. Action

ULS Shear Input

Applied ULS shear on one bolt (kN) Number of shear planes

Applied ULS shear per shear plane = applied ULS shear on one bolt / number of shear planes.

2. Material and bolt

Strength and Size

Bolt head type Countersink depth (mm) Bolt strength, f_ub (N/mm2) Steel strength, f_u (N/mm2) Thickness, t (mm) γ_M2 Bolt diameter, d (mm) Hole diameter, d₀ (mm)

3. Hole and geometry

Distances

Hole type Slotted-hole factor Slot width, d₀ (mm) Slot length, L (mm) Load Direction e1 parallel (mm) e2 perpendicular (mm) e3 slot axis to edge (mm) Clear c4, slot end to edge (mm)

Not code valid for this slotted-hole check. EN 1993-1-8 applies where the load is perpendicular to the longitudinal axis of the slotted hole.

4. Geometry Guide

e1/e2 Diagram

Basis: EN 1993-1-8 bearing resistance for a single bolt treated as an end/edge bolt.

e1 is measured parallel to the load direction. e2 is measured perpendicular to the load direction.

5. Result

Bearing Summary

Code basisEN 1993-1-8

Applied ULS shear per plane-

Effective t-

Effective d0-

Effective e1 / e2-

α_d-

f_ub/f_u-

α_b used-

k₁-

Hole factor-

Base F_b,Rd-

Final F_b,Rd-

Utilization-

Status-

Code applicability-

6. Code notes

Visible Limitations

This draft treats the checked bolt as a single end/edge bolt for facade-style one-bolt bearing checks.
For bolt groups, calculate the design shear action on the checked bolt separately and enter it here.
Oversized holes use 0.80 times the normal-hole bearing resistance.
Slotted holes use 0.60 times the normal-hole bearing resistance where the slot axis is perpendicular to load.
For slotted holes, this tool takes c4 as the clear distance to the slot end and calculates e4 = c4 + d0 / 2.
For countersunk bolts, bearing resistance is based on connected plate thickness minus half the countersink depth.
Net-section resistance, bolt shear resistance, tension interaction, and full connection behaviour may still require separate checks.

This calculation is provided for preliminary guidance only. VitraLab does not certify or approve the final design. All structural designs must be reviewed and approved by a qualified engineer before manufacture, installation, or use.

7. Report preview

Steel Report

VitraLab

Steel Single Bolt Bearing Check

Input Summary

Code basisEN 1993-1-8

Applied ULS shear on one bolt-

Number of shear planes-

Hole type-

Bolt head type-

Bolt diameter / effective hole-

Effective e1 / e2-

α_b used-

Result Summary

Base bearing resistance-

Hole factor-

Final bearing resistance-

Applied ULS shear per plane-

Utilization-

Preliminary guidance only. VitraLab does not certify or approve final design. Review by a qualified engineer is required before use.