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. "While this 

 item is very difficult to 

 estimate, the company 

 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 



the top block, 2 feet ^"^- l-'>— a clean, sanitary 

 -, , . foundations throughout a 



square and also taper- i-oad track. 



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 

 tramway footings 

 average 4 to 5 j^ears. 



In addition to the 

 direct saving in main- 

 tenance charges, we 

 must also keep in 



PIC6P 



retail yard, having concrete 

 nd creosotcd ties in the rail- 



