Concrete Anchorage Length Calculator

S_Ed [kN] Design tension force φ_l [mm] Diameter of rebar to be anchored n_l Number of rebars to be anchored φ_t [mm] Diameter of transverse reinforcement n_l,orth Number of bars orthogonal to anchored bars along l_bd. ⚠️ Must be iterated manually!

f_ck [MPa] Characteristic concrete compressive strength γ_c Concrete material safety factor (standard: 1.5) α_cc Coefficient for concrete strength (standard: 0.85) f_yk [MPa] Characteristic yield strength of reinforcement γ_s Steel material safety factor (standard: 1.25) σ_sEd [MPa] Design stress in rebar. Auto-calculated from S_Ed, but can be overwritten. Accepts mathematical formulas.

c [mm] Concrete cover (top/bottom) c₁ [mm] Concrete cover at sides c/c φ_l [mm] Center-to-center distance of main rebars

Bond Condition Good Poor Good: η₁=1.0, Poor: η₁=0.7 Loading Type Tension Compression Anchorage in tension or compression Bar Type Straight bars Angle hooks or hooks Loops Affects c_d calculation and α₁ Bar Shape Straight Non-straight Straight or bent bar configuration Element Type Slab Beam Structural element type K 0.05 0.1 0 Coefficient for transverse reinforcement: 0.1=bar inside bend, 0.05=orth. reinf. outside bars, 0=bar outside orth. bars