This is a code review for a classification change from F-1 to H-3. Although this references mostly Ohio Building Code the numbers should correspond directly to IBC and your local code. Bottom line is, there's a lot more to it. I believe that Scott Moore of @DalkitaConstruction may have just joined the forum. Scott consults on these matters and hopefully he will chime in on this thread. Without knowing what you are adjacent to, it is not possible to comment further.
Preliminary Code Review to Convert Existing Malt House F-1/S-1 to H-3
Use Group H-3 - Distillery and spirit storage
Table 307.1(1) – Spirits at 50% alcohol or less is a 1C flammable liquid and requires an H-3 use group when the MAQ of 120 gal x 2 = 240 gal is in use or storage is exceeded.
OBC 414 – Hazardous Materials
414.1.3 – Report required to be submitted to AHJ describing max quantities and types of hazardous materials to be in-use or stored
414.3 Ventilation – Mechanical ventilation required. 1 CFM/SF continuous in areas or spaces where flammable vapors may be emitted due to processing, use, handling or storage. Make up air likely required.
414.5.1 – Explosion control is not required per OBC Table 414.5.1 – 1C not listed.
414.5.2 – Standby power may be required for the continuous ventilation. This would be exempt if the 1C flammable liquid is stored in containers not exceeding 6.5 gal.
IFC 2704.2.1 – Spill control needed if storage is in individual vessels of more than 55 gals. The barrels are smaller than 55 gal so no spill control needed.
IFC 2704.2.2 – Secondary containment is not required.
OBC – 415 Detailed requirements for H Groups
415.3 – Fire Alarm monitoring of sprinkler riser. Existing, complies.
415.4 – Automatic sprinkler. Design should be review for the change of use/occupancy.
415.5.1 – Emergency alarm. Local manual alarm outside of egress from a storage area is required.
415.6 – Greater than 25% of the perimeter wall is exterior wall, Complies.
415.6.1 – Group H minimum fire separation distance.
OBC Table 602 – Exterior wall fire-resistance rating based on fire separation distance. 26’ separation distance to the east and west property lines requires a 1 HR exterior wall rating for an H use group.
OBC CH 5 – Building area. Existing building area is 13,246SF is less than Table 506.2 14,000SF for a IIB, H-3. Complies without open perimeter or sprinkler area increases.
OBC 706 – Fire walls. A 2 HR rated fire wall exists between the 5B (combustible) B-use office and the 2B (non-combustible) F-1/S-1 to separate building construction type. Table 706.4 requires a 3 HR rated fire wall for an H-3 use group.