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Bolted Splice Design Calculator

Design bolted splice connections for I/H sections per EN 1993-1-8 §3. Bolt shear resistance, bearing, net-section tension, block tearing, and splice plate checks — all with clause references.

Member Section
Bolt Configuration
Splice Plate
Applied Loads
Results
79.72%
PASS ✓
Governing check: Bolt shear resistance — EN 1993-1-8 §3.6.1 Eq 3.4
Results — EN 1993-1-8 §3
Bolt shear F_v,Rd 376.32 kN
α_v=0.6 · f_ub=800 MPa · A_eff=245 mm² / γ_M2=1.25
Bolt bearing F_b,Rd 453.33 kN
α_b=0.5556 · k₁=2.5 · d₀=24 mm
Net section N_u,Rd 558.14 kN
0.9 · A_net · f_u / γ_M2 (plate: 200×10 mm)
Block tearing — shear V_eff,Rd 743.14 kN
EN 1993-1-8 §3.10.2 Eq 3.9
Block tearing — tension N_eff,Rd 743.14 kN
EN 1993-1-8 §3.10.2 Eq 3.10
Gross yielding N_pl,Rd 710 kN
A_gross · f_y / γ_M0
All Checks
Check Clause Resistance (kN) Demand (kN) η Result
Bolt shear resistance EN 1993-1-8 §3.6.1 Eq 3.4 376.32 kN 300 kN 79.7% ✓ PASS
Bolt bearing resistance EN 1993-1-8 §3.6.1 Eq 3.6 453.33 kN 300 kN 66.2% ✓ PASS
Net section tension (splice plate) EN 1993-1-8 §3.4.2 + EN 1993-1-1 §6.2.3 558.14 kN 300 kN 53.8% ✓ PASS
Block tearing — shear mode EN 1993-1-8 §3.10.2 Eq 3.9 743.14 kN 0 kN 0% ✓ PASS
Block tearing — tension mode EN 1993-1-8 §3.10.2 Eq 3.10 743.14 kN 300 kN 40.4% ✓ PASS
Gross section yielding (splice plate) EN 1993-1-1 §6.2.3 710 kN 300 kN 42.3% ✓ PASS
Splice plate compression EN 1993-1-1 §6.3.1 710 kN 300 kN 0% ✓ PASS
Related Tools
→ Bolt Capacity — EN
→ Column Baseplate — EN
→ Endplate Moment Connection — EN
→ Fillet Weld Sizing — EN
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Frequently Asked Questions
What is EN 1993-1-8 Section 3 for bolted splices?
EN 1993-1-8 §3 covers the design of bolted connections in tension and compression members. It addresses bolt shear resistance (§3.6.1 Eq 3.4), bearing resistance (§3.6.1 Eq 3.6), net section tension (§3.4.2), and block tearing (§3.10.2 Eq 3.9/3.10).
How do I calculate bolt shear resistance for a splice?
Per Eq 3.4: F_v,Rd = α_v · f_ub · A / γ_M2. For double shear, multiply by 2. Use thread area A_s if the shear plane passes through the threaded portion, or gross area A if through the shank.
What is block tearing in a bolted connection?
Block tearing (§3.10.2) occurs when a group of bolts tears out of a plate along a combined shear/tension path. The resistance is the sum of the net tension fracture on the outstanding leg plus the shear yield along the perimeter.
How does hole type affect bearing resistance?
Larger holes reduce the net section and increase bearing stress. Normal clearance holes add 2 mm to the nominal diameter, oversized +4 mm, slotted +6 mm width. Use the effective hole diameter d₀ in the α_b and k₁ formulas.
When does a splice need moment design?
When the splice is at a point of significant bending (column splices, crane beams, frames). The flange plates carry tension/compression from M/z, the web plate carries shear. Eccentricities in the bolt group also produce secondary moments.
What national annex factors does this calculator support?
Currently EN 1993-1-8 (γ_M2=1.25), Dutch NL (γ_M2=1.25), and German DE (γ_M2=1.10). The NA also affects some edge-distance and spacing limits per the respective Annexes.