How do higher unit strength and greater wall thickness affect a masonry wall's load-carrying capacity?

How do higher unit strength and greater wall thickness affect a masonry wall's load-carrying capacity?

• A. Decrease load-carrying capacity.
• B. Increase thermal resistance but not strength.
• C. Increase load-carrying capacity and resistance to bending.
• D. Have no effect on structural performance.

Answer: (C)

Increasing unit strength and wall thickness directly boosts how much load a masonry wall can carry. Stronger units and mortar raise the strength of the masonry itself, so it can withstand higher compressive and shear stresses before failing. Greater thickness adds more material to the cross-section, increasing both the cross-sectional area and the moment of inertia, which makes the wall stiffer and better able to resist bending and deflection under loads. Put together, these factors raise the wall’s load-carrying capacity and its resistance to bending from vertical and lateral forces. It’s not just about thermal performance; the structural capacity clearly improves with stronger material and a thicker section.

Increasing unit strength and wall thickness directly boosts how much load a masonry wall can carry. Stronger units and mortar raise the strength of the masonry itself, so it can withstand higher compressive and shear stresses before failing. Greater thickness adds more material to the cross-section, increasing both the cross-sectional area and the moment of inertia, which makes the wall stiffer and better able to resist bending and deflection under loads. Put together, these factors raise the wall’s load-carrying capacity and its resistance to bending from vertical and lateral forces. It’s not just about thermal performance; the structural capacity clearly improves with stronger material and a thicker section.