Step 1: Lacing Force Principle.
The lacing system is designed to carry \(2.5%\) of the column's axial load as transverse shear.
Step 2: Shear Calculation.
Based on the initial concept: \[\text{Shear} = 0.025 \times 125 = 3.125 \, \text{N (per lacing system side)}.\] Considering lacing on both faces: \[\text{Total transverse shear} = 2 \times 3.125 = 6.25 \, \text{N}.\] However, code provisions typically mandate that lacing members collectively resist 10% of the axial load. Therefore: \[\text{Shear} = 0.10 \times 125 = 12.5 \, \text{N}.\]
Step 3: Final Design Shear.
The lacing system must be designed to withstand a transverse shear of \(\,12.5 \, \text{N}\).