Concrete Fastener Group Design - EC2 Part 4 Calculator

Fastener Configuration

Fastener Type:

	ID	x (mm)	y (mm)	d (mm)	h_ef (mm)	f_uk (MPa)	A_s (mm²)	d_head (mm)

Note: Area (A_s) is auto-calculated based on diameter. Override by entering value manually.

Concrete Properties

Input Method:

Concrete Strength Class:

f_ck (MPa):

Member Thickness (mm):

Cracked Concrete

Reinforced in Edge Region

k-factor: -

Cracked: k=10.5, Non-cracked: k=12.5 (reinforced) or 17.5 (unreinforced)

Edge Distances & Spacings

Edge Distances

c₁ (mm):

c₂ (mm):

c₃ (mm):

c₄ (mm):

Spacings

Auto-calculate from positions

Minimum Requirements (EC2):

• Edge distance: c ≥ max(c_min, 1.2h_ef)

• Spacing: s ≥ max(s_min, 3d)

Loading Conditions

Active Load Case:

Load Case	V_x (kN)	V_y (kN)	M_x (kNm)	M_y (kNm)	M_z (kNm)	N (kN)	Actions

Load Application Point (for all load cases)

Application Type:

Sign Convention:

• Positive V_x: → (right)

• Positive V_y: ↑ (up)

• Positive M_x: Bending about x-axis (tension on +y side)

• Positive M_y: Bending about y-axis (tension on +x side)

• Positive M_z: ⟲ (counter-clockwise torsion)

• Positive N: ↑ (tension)

Analysis Options

Loading Type:

Material Factors

Override

γ_Ms (Steel):

γ_Mc (Concrete):

Failure Modes to Check

Tension:

Steel Failure Concrete Cone Pull-out Splitting Blow-out

Shear:

Steel Failure Concrete Edge Pry-out

N-V Interaction

α_N (tension exponent):

β_V (shear exponent):

Interaction Formula:

(N_Ed/N_Rd)^α_N + (V_Ed/V_Rd)^β_V ≤ 1.0

Keyboard shortcut: Ctrl+Space

Geometry & Load Distribution

Force Scale:

Applied Forces Distributed Forces

Fasteners

Applied Forces

Distributed Forces

Analysis Results

Run analysis to see results