What is the maximum grade/slope that the Fire Marshals Office will allow?
Standard CFMO-A1 and the County Ordinance Code limits the maximum grade for both driveways and access roads to 15 percent. However, on a case-by-case basis our office (with the concurrence of County Land Development Engineering for access roads) may permit up to a maximum 20 percent if no other method is practicable and if consistent with good engineering practices. In no case shall the portion exceeding 15 percent gradient be longer than 300 feet in length, unless there is at least 100 feet at 15 percent or less gradient between each 300 foot section. If your access road and/or driveway is in excess of 15 percent you will be required to provide fire sprinklers throughout your new structure. To view our Standards click on the Related Link below.
