Inclined Struts (GE and HE):

The inclined struts GE and HE are designed for a compressive force of 26,077 N.

The actual length of the member = 2.5/sec 26.56 = 2.8 m

Effective length = 0.85 × 2.8 =2.38 m

Select IS angle 65 × 65 × 6 mm @ 5.8 kg

Area = 7.44 cm², r_min = 1.26 cm

∴          Slenderness ratio, λ = 2380/12.6= 189

Corresponding, σ_ac = 30

Allowing 33% increase for wind effects σ_{ac (perm)} = 40 MPa

∴ Allowable axial compression = 40 × 744 = 29,760 N

> 26,077 N     ∴ OK.