As the saying goes, “I am glad you asked that question.” The short
answer is “Yes,” there is a designated minimum air space in
Many years ago when I was still in school, I had to fight for good grades
like everyone else. The problem in my math classes was not just getting
the answers correct, but providing the necessary proof for the answers. The teachers did not seem to appreciate my knowledge (or maybe it was my explanation) that if I gave them my proof, I would have to shoot them. I could see their displeasure by the drop in my grade. They finally wore down my resistance, and I decided to see reality and provide the proof with my answers.
To find the entire answer, we go to Chapter 12 of TMS 402-13. The
actual name is Building Code Requirements for Masonry Structures,
but you will find I use “TMS 402-13” or the “Code” because it is shorter.
Read the entire article: Painter's Corner ~ February 2017