Excerpts from submittal requirements | Rack Flue Spaces-CFC 3208.03 – Requirements for flue space keepers within the rack storage are provided in CFC Table 3208.3 (attached). Single and double row racks shall be equipped with a transverse flue space. A mechanical means shall be provided to maintain the transverse flue space at the uprights (Attachment 7, Method 1). The device and its installation method shall be identified on the plan. Transverse flue spaces between uprights shall be marked with a 3 or 6 inch yellow strip on the load beam with words in red that read, “Keep Clear,” as indicated below. Durable vinyl tape, paint, or other methods as approved by OCFA may be used.