What is the minimum exterior wall thickness for Masonry Pre-33 walls?

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Multiple Choice

What is the minimum exterior wall thickness for Masonry Pre-33 walls?

Explanation:
Masonry Pre-33 exterior walls are built to provide enough strength and fire resistance by using multiple brick wythes. A standard brick is about 3-5/8 inches wide, and with mortar joints each wythe contributes roughly a little over 4 inches in thickness. Three wythes add up to around 12 inches, and when you include the joints between wythes, you end up near 13 inches. That’s why the minimum exterior wall thickness for Masonry Pre-33 walls is about 13 inches. A thinner wall, such as 12 inches, wouldn’t meet the pre-1933 construction practice, while a thicker wall isn’t the minimum requirement.

Masonry Pre-33 exterior walls are built to provide enough strength and fire resistance by using multiple brick wythes. A standard brick is about 3-5/8 inches wide, and with mortar joints each wythe contributes roughly a little over 4 inches in thickness. Three wythes add up to around 12 inches, and when you include the joints between wythes, you end up near 13 inches. That’s why the minimum exterior wall thickness for Masonry Pre-33 walls is about 13 inches. A thinner wall, such as 12 inches, wouldn’t meet the pre-1933 construction practice, while a thicker wall isn’t the minimum requirement.

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