How many 2x4 needed to frame 240 square feet?

To frame a space of 240 square feet, you'll need to calculate the perimeter and the amount of framing required. Assuming standard wall height and no Windows or doors, you can estimate that you will need approximately 1 linear foot of 2x4 for every square foot of wall area. This means you would need about 240 linear feet of 2x4. Since a standard 2x4 is 8 feet long, you would require around 30 pieces of 2x4 (240 ÷ 8 = 30).