64 
Indian Forest Records. 
[VOL. IX 
and mud, wood, or brick — the essential point being that the walls 
protect the timber from wind aiid sun and do not extend way to the 
roof or to the ground. An opening 1^ — 2^ feet wide should be left 
above and below the w^alls to permit sufficient circulation of air 
through the lumber piles. 
In a Class II shed the side walls must be removable for loading 
and unloading. Walls consisting of a series of swinging or sliding 
doors (w’ood or thatch) provide a good permanent type of construc- 
tion ; but more temporary and cheap construction may be used 
effectively, as for example, by closing the sides, except the space 
under the roof and above the ground, with boards standing on end 
side by side on a support below and secured in a slot or collar above. 
This arrangement involves no great initial expense as the boards ai-e 
available from those of less valuable species to be seasoned. Any 
or all of the boards may be easily removed for loading and unloading 
if no permanent fastenings are used ; and, as the condition of the 
lumber requires, planks may be removed at intervals to allow a 
freer circulation of air through the shed. 
Another type of shed, Class III, which may be used for woods of 
medium refractoriness or for refractory woods in a damp climate, 
combines the features of Class I and Class II sheds. Such a shed 
is virtually a half section of a Class I sTied, i.e., one side is permanently 
closed except under the roof and above the ground, and the other is 
open for loading and unloading with a sufficiently overhanging roof 
to protect the ends of the lumber piles from the elements. This type 
of shed should be open to the north, unless otherwise shaded, so that 
the exposed side will be in the shade. In extreme southern latitudes 
where the sun will shine on a north exposure during the hottest part 
of the dry weather, this type of shed should not be used unless it 
can be shaded artificially on the open side. 
The roof in any type of shed may be of any construction which is 
weather proof, i.e., thatch, tile, wood, or iron. The essential feature 
of the roof construction is that it should overhang the sides of the 
shed at least three feet so as to protect the space left for ventilation 
between the roof and side walls. Thatch construction involves a fire 
hazard that warrants serious consideration when used in the vicinity 
of sawmills. Uninsulated iron roofs exposed to the sun increase the 
temperature within the sheds and make the lumber more liable to 
crack. 
The ends of the sheds should be tightly closed except for the 
doors in sheds having the central drive- way. 
Within the seasoning sheds the lumber should be piled horizontally 
on suitable foundations and with proper crossers as detailed further 
on in this note. The piles should be raised from the ground sufficiently 
to permit a circulation of air under the piles. 
(b) Capacity . — The capacity of a shed 100' long, 36' wide, and 
14' high at the sides is from 200 — 275 tons of 1" boards. The division 
[ 210 ,] 
