A single-story frame has two bays. The left bay is $6 \text{ m}$ wide, and the right bay is $8 \text{ m}$ wide. The height is $4 \text{ m}$. A lateral wind load of $30 \text{ kN}$ is applied at the roof level (top left joint). Analyze the frame using the Portal Method to find the base shears and column moments.

A two-story frame has one $6 \text{ m}$ wide bay. The first story is $5 \text{ m}$ high, the second is $4 \text{ m}$ high. A lateral load of $20 \text{ kN}$ acts at the roof, and $40 \text{ kN}$ acts at the 2nd floor. Find the column shears in both stories.

A three-story frame has three bays (all $5 \text{ m}$ wide). All stories are $4 \text{ m}$ high. Lateral loads are $10 \text{ kN}$ (roof), $20 \text{ kN}$ (3rd floor), and $20 \text{ kN}$ (2nd floor). Find the shears in the 1st-story columns.

Let's use the exact same frame from Portal Method Example 1 (Left bay $6 \text{ m}$, right bay $8 \text{ m}$, height $4 \text{ m}$, $30 \text{ kN}$ roof load). Assuming all columns have the same cross-sectional area $A$. Analyze it using the Cantilever Method.

Use the same single-story, two-bay frame ($6 \text{ m}$, $8 \text{ m}$ bays, $4 \text{ m}$ high, $30 \text{ kN}$ load), but now the interior column is a W12x50 (Area = $2A$), and the two exterior columns are W10x33 (Area = $A$). Find the column axial forces.