How is the Tension Flange Weld checked?

Tekla Connection Designer

Environment

British Standard

Example

Design Data
Flange width; Bb = 318.4 mm
Flange thickness; Tb = 37.7 mm
Web thickness; tb = 23 mm
Beam design strength; py = 345 N/mm2
Endplate width; Bp = 320 mm
Weld; s = 10 mm
Weld strength; pw = 220 N/mm2
Tension Force
Fftw_a = Bb x Tb x py = 4141.270 kN
For flush end plate - Total tension force in the top two bolt rows
For extended end plate - Total tension force in the top two bolt rows+ bolt rows in extension
tension force in row 1; R1 = 274.4 kN
tension force in row 2; R2 = 222.9 kN
Fftw_b = R1 + R2 = 497.300 kN
Tension Force; Fftw = min(Fftw_a, Fftw_b) = 497.300 kN
Tension Capacity
Pftw1 = 1.25 x ( 2 x Bb - tb + 2 x Tb ) x 0.7 x s x pw = 1326.710 kN
Pftw2 = 1.25 x ( 2 x Bb - 4 x s - tb ) x 0.7 x s x pw = 1104.565 kN
Tension Capacity; Pftw = if(Bp < Bb + 2 x s, Pftw2 ,Pftw1 ) = 1104.565 kN
Utilisation; Fftw / Pftw = 0.450