LUMBERING IN" PINE REGION OF CALIFORNIA. 

 Table 7. — Cost of standard-gauge frame trestles. 



53 



Lengtli. 



Maximum 

 height. 



Feet, 



board 



measure. 



Total 

 cost. 



Cost 

 per 1,000. 



Cost 



per 



linear 



foot. 



Feet. 



Feet. 











620 



52 



105,000 



$2,800 



S26.66 



S4.52 



652 



28 



60,000 



1,565 



26.08 



2.40 



762 



8 



68,000 



1,704 



25.06 



■\23 



202 



32 



28,000 



743 



26. ' 



3.68 



140 



34 



19,000 



487 



2^ 



3.34 



23S 



31 



31,000 



724 



23.35 



3.04 



272 



- 41 



45,000 



1,030 



22.89 



3.77 



144 



54 



30,000 



713 



23.76 



4.95 



It thus appears that the cost of constructing sawed-timber trestles 

 in this region varies from $23 to $27 per 1,000 feet board measure? 

 depending upon the difficulties of construction, particularly the 

 amount of work necessary in excavatmg fomidations. A good av- 

 erage figure for trestle construction is $25 per 1,000. The cost per 

 finear foot may be roughly calculated as from $2.25 to $2.75 for 

 trestles with a maximum height of from 10 to 25 feet, from $2.75 to 

 $3.50 for a maxunum height of from 25 to 35 feet, from $3.50 to $4.50 

 for a maximum height of from 25 to 50 feet, and from $4.50 to $5 for 

 a maximum height of from 50 to 55 feet. 



Most of the ties used on loggmg railroads are sawed at the mill 

 and hauled back to the woods. The material is usually white fir or 

 defective cedar. Split cedar and hewed white fir are used in some 

 instances. The usual size on standard-gauge roads is 7 by 8 inches 

 by 8 feet. Some roads use with equal success ties 6 by 8 inches by 

 8 feet. The first size contains 37J feet board measure, and the 

 second 32 feet. The usual narrow-gauge tie is 6 by 8 inches by 6 

 feet. Sometimes, in order to cut three ties from a 16-foot timber, 

 the length is made 5J feet. The contents of a sawed narrow-gauge 

 tie is 24 feet board measure. 



The number of tics per mile varies with the size of the rail, the 

 weight of the locomotive, and the efficiency of the roadbed. Upon 

 permanent main-line logging roads the usual number is 16 per rail, or 

 2,816 per mile. Most main-line roads and spurs have 17 per rail, or 

 2,992 per mile. Some spurs have 18 per rail, or 3,168 per mile. The 

 volume in feet board measure of 2,992 sawed ties per mile is 111,600 

 for the larger standard-gauge ties, 95,700 for the smaller standard- 

 gaug(! siz(!, and 71,800 for narrow-gauge ties. At $12 per 1,000 the 

 cost per mile is, respectively, $1,339.20 for the first, $1,148.40 for the 

 second, and $861.60 for the third. Wliere suitable young timber is 

 available;, hewed sluiidurd-gaiigf! ties can sometimes Ix; delivt^nul at 

 the track for frcjrn 20 to 25 cents each. At 20 cents each, the cost is 

 approximately $600 per mile. 



