I have a question about traverse flue spaces. In NFPA 13 22.214.171.124.2.1 is " Nominal 6in traverse flue spaces between loads an at rack uprights shall be maintained in single-row, double-row and multiply-row racks"
Three person and three options. What solusion at rack upright is according to this sentence? Option 1, option 2 or option 3?
Thank you for your help