8 BULLETIN 277, U. S. DEPARTMENT OF AGRICULTURE. 
Walls. —A blank wall of brick not less than 17 inches in thickness ! 
should separate each compartment. This wall should be parapeted 
above the roof at least 3 feet, and the parapets should be capped with 
durable coping. The wall and parapet should extend 3 feet beyond 
the frame end walls. Division walls forming a T instead of extending 
beyond the frame end walls would be a desirable improvement. 
Outside end. walls should be constructed of clapboards (weather 
boards) securely nailed to posts and studding, which render the wall 
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Fig. 1.—Closed cotton warehouse, compartments limited to 600 bales capacity—detached. 
spark proof and weatherproof. All woodwork exposed to the weather 
should be paimted or whitewashed. When the end of the warehouse, 
which is formed by the outer side walls of the end compartments, is 
exposed, this wall should be of brick at least 13 inches thick and 
coped in the same manner as the division walls. 
Floors.—Floors should be preferably of concrete, but may be of 
earth, brick, or some other incombustible material. (See discussion 
of floors on p. 32.) When the floor is elevated to the height of the 
car floor, with frame platforms extending across the ends of the com- 
partments, the division walls should be built from the ground to the 
!' The thickness of walls referred to in all of the standards are for one-story buildings. For thickness 
required in buildings of greater height, see table on p. 32. 
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