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Resistance of the net section of diagonal

The design ultimate resistance of the net section is given by :

with

A_net	the net area of the diagonal element See also chapter ""Determination of Anet""
fu	the ultimate tensile strength of the diagonal element
N_u,Rd	the design ultimate resistance
γ_M2	the partial safety factor for resistance of net section

In the case of unsymmetrical connected diagonals (such as angles by one leg), the eccentricity of the fasteners in end connections shall be taken into account.

Angle diagonal with 1 bolt

with

e₂	the edge distance
fu	the ultimate tensile strength of the diagonal element
N_u,Rd	the design ultimate resistance
γ_M2	the partial safety factor for resistance of net section
t	the material thickness
d₀	the bore hole

Angle diagonal with 2 bolts on 1 line

with

Anet	the net area of the diagonal element : for unequal-leg angle connected by its smaller leg, Anet should be taken as equal to the net section area of an equivalent equal-leg angle of leg size to that of the smaller leg.
fu	the ultimate tensile strength of the diagonal element
N_u,Rd	the design ultimate resistance
γ_M2	the partial safety factor for resistance of net section
β₂	reduction factor (see table)
d₀	the bore hole

Pitch p₁	<= 2.5 d₀	>5.0 d₀
2 bolts : β₂	0.4	0.7
3 bolts or more : β₃	0.5	0.7

Angle diagonal with 3 bolts on 1 line

with

A_net	the net area of the diagonal element : for unequal-leg angle connected by its smaller leg, Anet should be taken as equal to the net section area of an equivalent equal-leg angle of leg size to that of the smaller leg.
f_u	the ultimate tensile strength of the diagonal element
N_u,Rd	the design ultimate resistance
γ_M2	the partial safety factor for resistance of net section
β₃	reduction factor (see table in chapter ""Resistance of the net section of diagonal"")
d₀	the bore hole

Angle diagonal with Double Leg connection

with

f_u	the ultimate tensile strength of the diagonal element
A	the area of the diagonal element
A_net	the net area of the diagonal element
γ_M2	the partial safety factor for resistance of net section
N_u,Rd	the design ultimate resistance
t	the material thickness
d₀	the bore hole

Other sections and configurations

See Ref.[31] pp.4.9

with

A₁	the net area of the connected flange See also chapter ""Determination of Anet""
A₂	the area of the free flanges / webs
fu	the ultimate tensile strength of the diagonal element
N_u,Rd	the design ultimate resistance
γ_M2	the partial safety factor for resistance of net section

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