140 BULLETIJSr 414, U, S. DEPAETMENT OP AGEICULTUEE. 



The estimated itemized cost of this eqtdpment of structures is as 

 follows : 



Lumber, 14,000 board feet, at $18 per M $252 



Roofing, 20-gauge galvanized iron, 2J-inch corrugations, 6,000 square feet, at 



Hi cents 690 



Ridge roll, bolts, nails, etc 20 



Canvas ciu-tains, 10-ounce duck, 500 yards, 29 inches wide, at 27 cents per 



yard 135 



Screens, 3,360 square feet, at 8 cents 270 



Labor 300 



16 by 20 foot wall tent, 12-ounce army duck 45 



Total 1, 712 



Reducing this estimate to a cost per cubic foot, the costs of the 

 principal items are as foUows: 



Lumber $0. 007 



Roofing 019 



Ridge roll, bolts, nails, etc 001 



Canvas curtains 003 



Screens 003 



Labor 008 



Tent 001 



Total cost per cubic foot 042 



While the above cost is only a httle more than two-thirds as great 

 as that of the portable buildings designed by the Office of Pubhc 

 Roads and Rural Engineering, it should be borne in mind that those 

 buildings are of a much higher type of construction and are suitable 

 for winter as well as summer use. Furthermore, the canvas used in 

 these buildings will have to be replaced every two years under 

 normal conditions, and the metal roofing also will depreciate much 

 more rapidly than any part of the portable buildings. For these 

 reasons, notwithstanding their lower initial cost and narrower field 

 of usefulness, it is beheved that buildings of this general type wiU 

 cost, in the long run, practically as much as the portable buildings 

 previously described. 



SHACKS. 



Shacks of rough lumber made weather tight with a covering of tar- 

 paper, similar to those used generally in free contracting camps, may 

 be economically used for temporary camp purposes in sections where 

 lumber is very cheap. Experience has shown that it does not pay 

 to attempt to move them with the camp, the cost of taking them 

 apart and the large proportion of lumber ruined being usually greater 

 than the cost of new lumber. 



Structures of this kind can be built for from 2^ to 3 cents per cubic 

 foot. 



