Gusset to Beam Weld Strength
ratio = 3.95 / 8.78
= 0.45
PASS
Gusset to Beam Interface - Forces
shear V
= 84.85
[kips]
axial N
= 0.00
[kips]
moment M
= 42.07
[kip-ft]
Gusset to Beam Interface - Weld Length
Gusset-beam fillet weld length
Lw
=
= 32.108
[in]
Gusset to Beam Interface - Combined Weld Stress
Weld stress from axial force
fa
= N / Lw
= 0.000
[kip/in]
Weld stress from shear force
fv
= V / Lw
= 2.643
[kip/in]
Weld stress from moment force
fb
= 2.938
[kip/in]
Weld stress combined - max
fmax
= [ (fa - fb )2 + f2v ]0.5
= 3.952
[kip/in]
AISC 14th Eq 8-11
Weld resultant load angle
θ
= tan-1 [( fb - fa ) / fv ]
= 48.0
[°]
Fillet Weld Strength Calc
Fillet weld leg size
w
= 5⁄16
[in]
load angle θ
= 48.0
[°]
Electrode strength
FEXX
= 70.0
[ksi]
strength coeff C1
= 1.00
AISC 14th Table 8-3
Number of weld line
n
= 2 for double fillet
Load angle coefficient
C2
= ( 1 + 0.5 sin1.5 θ )
= 1.32
AISC 14th Page 8-9
Fillet weld shear strength
Rn-w
= 0.6 (C1 x 70 ksi) 0.707 w n C2
= 24.508
[kip/in]
AISC 14th Eq 8-1
Base metal - gusset plate
thickness t
= 0.375
[in]
tensile Fu
= 65.0
[ksi]
Base metal - gusset plate is in shear, shear rupture as per AISC 14th Eq J4-4 is checked
AISC 14th J2.4
Base metal shear rupture
Rn-b
= 0.6 Fu t
= 14.625
[kip/in]
AISC 14th Eq J4-4
Double fillet linear shear strength
Rn
= min ( Rn-w , Rn-b )
= 14.625
[kip/in]
AISC 14th Eq 9-2
Resistance factor-LRFD
φ
= 0.75
AISC 14th Eq 8-1
φ Rn
=
= 10.969
[kip/in]
When gusset plate is directly welded to beam or column, apply 1.25 ductility factor
to allow adequate force redistribution in the weld group
AISC 14th Page 13-11
Weld strength used for design after applying ductility factor
φ Rn
= φ Rn x ( 1/1.25 )
= 8.775
[kip/in]
ratio
= 0.45
> fmax
OK