2006 IRC
So, I have a person who wants to place an all aluminum framed, non conditioned, sun room at grade. They want to cut through the existing concrete patio, 12" wide and pour a trench foundation to 42" below grade. It will be even/level with the existing patio at grade. But section 404.1.6 requires the foundation to be 6 inches higher than grade. The commentary for the code says this is for termite control as well as for minimizing the chance of decay.
Well its aluminum, so neither of those will affect the structure. A reduction is specifically called for if masonry exterior is being used. You can drop to 4 inches.
Common sense?
How about, where in the code does it allow for the 16 foot wide entry through the overhead garage door to be reduced to grade level?
So, I have a person who wants to place an all aluminum framed, non conditioned, sun room at grade. They want to cut through the existing concrete patio, 12" wide and pour a trench foundation to 42" below grade. It will be even/level with the existing patio at grade. But section 404.1.6 requires the foundation to be 6 inches higher than grade. The commentary for the code says this is for termite control as well as for minimizing the chance of decay.
Well its aluminum, so neither of those will affect the structure. A reduction is specifically called for if masonry exterior is being used. You can drop to 4 inches.
Common sense?
How about, where in the code does it allow for the 16 foot wide entry through the overhead garage door to be reduced to grade level?