9 P E G I'F I C A T I N 3 



: V F '0 R : 

 OBSERVATION BO'OTfi 



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These specif ications are inte-nded to give sup& in- 

 structions as appear necessary in order that "the carpenter 

 in charge of the work may foTlow the general idea of the 

 plan and builder's material list. Variations due to differ 

 ent locations and accessibility to lumb-er markets have been 

 considered and estimates prepared 



It is understood that |the carpenter shall have the 

 right to exercise his judgment in making any necessary minor 

 changes during the progress of the building, but the general 

 plan should be followed unless permission to deviate from it 

 has first been secured from :the District Forester. 



FOUNDATION. 



Foundation footing should .preferably be either of rock 

 masonry or large flat rocks. If of masonry the stone should 

 be hard. The lower courses should be laid with large flat 

 rocks, all to be carefully bedded on their broadest faces 

 in mortar of one part Portland cement and two parts coarse, 

 sharp, clean sand, well screened and free from loam or silt. 

 Each layer should be well filled and flushed up on both sides 

 and firmly bonded together, and flat rocks should have at 

 least 2 sq. ft. of bearing surface. The tops of foundation 

 footing must be level and must project at least 4" above the 

 surface of the ground. Foundation blocks are to be placed 

 under each of the six corners. 



This type of building may be, exacted sometimes where 

 heavy winds constitute a factor of danger. In such cases 

 bolt the building to the Foundation. Foundation blocks in 

 such localities should always be large, or better still, if 

 possible set the building on solid rock. Figure No. 1 on 

 out Rec. No. 1 indicates. method of bolting sills to the foot- 

 ing, of the building. 





In addition to the above provisions of safety, the 

 building should be guyed with No. 9 wire from 4 corners. 



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