192 BULLETIN 111, U. S. DEPARTMENT OF AGEICULTURE. 



The following is the cost of several pile-bent trestles built in log- 

 ging camps of the region during the past few years : 



Case 1. — The labor cost of a pile-bent trestle 1.800 feet long and 

 averaging 5 feet in height amounted to $900, or $0.50 per linear foot. 

 The bents consisted of three piles ; the caps and stringers were hewn 

 hemlock timber. 



Case 2. — The cost of building a three-pile-bent trestle 160 feet in 

 length and averaging about 20 feet in height amounted to $464, or 

 $2.90 j)er linear foot, the cost being made up as follows : 



Excavating $106 



Labor, including surveying to the amount -of $40.75 265 



Rent of machinery 60 



Finishing (including laying of steel) 33 



Total 464 



This amount includes the cost of yarding the material to the site. 

 It does not include the cost of timber or iron used. The caps and 

 stringers were made of hewn timbers. 



Case 3. — The cost of building a pile-bent trestle 1,200 feet in 

 length and averaging about 10 feet in height amounted to $5,428.31, 

 or $4.52 per linear foot, the cost being made up as follows : 



Stringers, caps, and iron $1, 450. 81 



490 piles (25 feet in length) at 7 cents per foot 857. 50 



Towing piling . ' 70. 00 



Lumber, 14,000 feet, at $8 per thousand 112.00 



Labor 2, 938. 00 



Total 5, 428. 31 



Case 4. — The cost of a pilo-bcnt trestle 135 feet in length and 

 ayeraging about 28 feet in height was $5.20 per linear foot. This 

 includes the cost of yarding the material to the site and building the 

 trestle, also a rental of $5 per day on the equipment. It does not in- 

 clude the value of the timber, sawed or otherwise. 



The bents consisted of four piles, the trestle being 47 feet at the 

 highest 23oint. Hemlock piling, hewn hemlock caps, and sawed 

 bracings were used. There were three sets of bracing, made of 3 

 by 8 inch and 3 b}' 10 inch material. 



Case 5. — The cost of building a pile-bent trestle 160 feet in length 

 and averaging about 20 feet in height was $2.50 per linear foot. This 

 includes the cost of yarding the material to the site and building the 

 trestle, also a rental of $5 per day on the equipment. The bents 

 consist of three piles, the highest point on the trestle from the ground 

 being 20 feet. Rough hemlock timber was used for piling, caps, and 

 stringers. 



Case 6. — The cost of a pile-bent trestle 160 feet in length and hav- 

 ing an average height of 8 feet was $2.40 per linear foot. This 



