In the designation L 3-1/2 x 3-1/2 x 1/4, what does the letter L indicate?

In the designation L 3-1/2 x 3-1/2 x 1/4, what does the letter L indicate?

• A. The length of the member
• B. The material grade
• C. An L-shaped angle
• D. The thickness

Answer: (C)

Shape designations use the leading letter to identify the cross‑section’s geometry. The letter L specifically marks an L‑shaped angle, meaning two legs meet at a right angle. The remaining numbers give size: each leg is 3-1/2 inches long and the thickness is 1/4 inch. So the L denotes the L‑shaped angle form, not the length of the member or its material grade (the thickness is the last dimension).

Shape designations use the leading letter to identify the cross‑section’s geometry. The letter L specifically marks an L‑shaped angle, meaning two legs meet at a right angle. The remaining numbers give size: each leg is 3-1/2 inches long and the thickness is 1/4 inch. So the L denotes the L‑shaped angle form, not the length of the member or its material grade (the thickness is the last dimension).