18 
BULLETIN 510, U. S. DEPARTMENT OF AGRICULTURE. 
Fig 14. — General view of a mill yard in Mississippi, show- 
ing concrete pile foundations and tramway footings. 
The ditch assists materially in draining the yard. No 
debris is allowed to accumulate. The stacks are high 
off the ground and amply ventilated beneath. The tram- 
way and pile foundation timbers would be improved by a 
preservative treatment with creosote. 
m i n d the advantage 
gained in preventing 
deterioration in the 
stored lumber itself, 
due to improved sani- 
tation. W h i 1 e this 
item is very difficult to 
estimate, the compam T 
believes it a very ap- 
preciable asset of its 
storage practice. 
The approved type 
of concrete foundation 
pier now in use by this 
company is of the form 
illustrated in figure 20, 
consisting of a base 
block 3 feet square, 
tapering upward and 
cast in position. Upon 
this base block is cast 
based on a consump- 
tion of 600,000 feet 
of timber a year at a 
value of $12 per 1,000 
feet b. m., is $7,200, 
or 12 cents per thou- 
sand of mill cut. The 
timber used consists 
of pine heart seconds 
having an average 
life of 5 to 6 years 
and a maximum life 
of 8 to 10 years for 
material not in con- 
tact with the ground : 
pile foundations and 
tramwav footings 
average 4 to 5 years. 
In addition to the 
direct saving in main- 
tenance charges, we 
must also keep in 
the top block, 2 feet 
square and also taper- 
Fig. 15. — A clean, sanitary 
foundations throughout a 
road track. 
PI05F 
retail yard, having concrete 
nd creosoted ties in the rail- 
