FOUNDATION. 



Do not place foundation blocks or underpinning 

 farther apart than 7 feet on center. Where snov/ loads are 

 excessive or the ground is not firm, place foundation 

 blocks or underpinning on 4 foot center under all outside 

 sills; on 6 foot centers on all exterior sills and girts. 

 Where underpinning on short centers are necessary, add 

 sufficient material to the lumber order list to provide 

 for them. 



Foundation blocks shall ordinarily be of large 

 stones of sufficient thickness to raise the sills at 

 least 6" above the ground. The sills should be pieced 

 directly on these stones. If stones of suitable sizes 

 are not available, concrete or masonry blocks shall be 

 provided. See Concrete Section of the Circular -- 

 Foundations. A dry wall should be set up between found- 

 ation blocks under all outside sills. If the building 

 site is not level fthd if to grade it level throughout 

 is impracticable, foundations shall be either of 



fa).- 6" x 6" heart cedar, redwood or Douglas fir 

 underpinning, set upon substantial flat stones of 

 sufficiert thickness to project at least 4 inches above 

 the ground. Woo j^ bloc kg should never be used for foot- 

 ings under foundation posts. 



(b).- If substantial stones are not available, a 

 masonry footing should be provided. For masonry 

 use only hard stones preferably flat ones. All should 

 be carefully imbedded on their broadest faces in mortar 

 of 1 part cement and 2 parts coarse, clean, sharp sand. 

 Each layer should be well filled ard flushed up on both 

 sides and firmly bonded together. The tops should be 

 made level to receive the underpinning. See Table 

 No. C-4. 



MATSRIAIS 



All structural materials should conform as close- 

 ly as possible to the specifications given in the builder's 

 list and lumber order list. That minor deviations must 

 sometimes be made is recognized as unavoidable. 



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