Aisles

TB 43-0199

2 hours. If the building is unprotected, then no more than 27, 500 gallons of DS2 may be placed in this type of storage

and no pile may have more than 13, 750 gallons. For protected storage, the maximum amount of DS2 allowed is 55, 000

gallons and no pile may have more than 15, 000 gallons.

General warehouses. These are separate, detached buildings or areas separated from other types of

occupancies by a standard 4-hour fire wall. No more than 2, 750 gallons of DS2 may be located in this type of storage.

Liquid warehouses. A liquid warehouse is a separate, detached building or area separated from other types of

occupancies by a 4-hour fire wall and is specifically designed to store liquids. There are no restrictions as to the amount of

material that can be stored in these warehouses. However, the amount of material that can be placed in one pile is

restricted. In the case of unprotected storage, no more than 13, 750 gallons may be stored in any one pile. For protected

storage, no pile may have more than 15, 000 gallons.

4-4.3 Aisles. In DS2 depot or garrison storage areas, aisles between piles of DS2 containers shall be 4 feet wide so that

no container is more than 12 feet from an aisle. Main aisles shall be a minimum of 8 feet wide. Piles shall be at least 18

inches from any fire wall.

4-4.4 Lighting. Electrical wiring and lighting used in DS2 storage areas shall be that suitable for general use.

4-4.5 Ventilation. Ventilation is required only for DS2 storage rooms within buildings and should be provided by natural

means. Natural ventilation inlet and outlet openings shall be arranged to provide air movement across all portions of the

floor of the storage area. Exhaust air shall be discharged through a wall on one side of the room and within 12 inches of

the floor with one or more make-up inlets located on the opposite side of the room within 12 inches of the floor. Exhaust

from the room shall be directly to the exterior of the building without recirculation. While ventilation is not required in

attached buildings or warehouses, care must be taken to ensure that DS2 vapors are not concentrated in the storage area.

4-4.6 Floors. Floors in DS2 storage areas shall be liquid tight and constructed to contain liquids by recessing the floor 4

inches, installing a liquid-tight DS2 resistant sill a minimum of 4 inches high, or installing a grating trench which drains into

a collection area. For disposal of collected run-off waste, see paragraph 7-2.2.