1 OFA Dear Colleague letter on Rescinding guidance concerning waiver and expenditure authority under section 1115 of the Social Security Act Published: August 30, 2017. The U.S. Department of Health and Human Services (HHS) is committed to helping low-income families transition from welfare to work.
We added a front porch to our house that is 36 feet long and 8 feet 3 inches wide. One thing that I think people tend to overlook - but what some posters have stated - is how much useable space is taken up by porch posts/columns and railings.
Add that to the 102.2 inches (101.2 plus 14.75 = 115.95 or 116 inches). Your rafters will need to be at least 116 inches long. Porch Home / Build a Porch / Roofing Materials Comparison. If your rise and run (or slope) is 4/12, multiply the square footage above (504) by 1.06.1496 x 1.06 = 534.24 square feet. You did it-the area of your porch roof would be 534.24 square feet.dd that to the 102.2 inches (101.2 plus 14.75 = 115.95 or 116 inches). Your rafters will need to be at least 116 inches long. Porch Home / Build a Porch / Roofing Materials Comparison. If your rise and run (or slope) is 4/12, multiply the square footage above (504) by 1.06.