sufficient thickness to project at least 4 inches 

 above the ground. Wood blocks^ should never "be 

 used for footings unaer foundation "Posts. 



(b) If substantial stones are not available, 

 provide a masonry or 'concrete footing. 3Tor 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 

 and flushed up on both sides and firmly bonded to- 

 gether. The tops should be made level to receive 

 the underpinning. See Table No, C~4. 



(c) large stones of sufficient thickness to 

 raise the sill to a height of at least 12 inches 

 above the ground. 



(d) Blocks of masonry or concrete at least 



12 inches high, 10 inches wide on top and 16 inches 

 square at the bottom. The top of concrete and mason- 

 ry blocks should be made level to receive the sills. 

 See Concrete Section, and Table No. C-4. 



(e) If wr.ter and sev/er pipes are to be placed 

 under a building, foundation blocks or underpinning 

 must be at least E4 inches high, 



MATERIALS. 



All structural materials should conform 

 as closely as possible to the specifications given 

 in the builder's list and lumber order list. That 

 minor deviations must some times be made is recog- 

 nized as unavoidable, 



SILLS. 



Should preferably be of cedar or redwood. 

 Douglas fir may be used as a second choice. 



Set rectangular sills with narrow edge up. 



Sills at corner should be halved togethere 

 When two or more pieces are necessary to form the 

 total length of sill a splice should be made on the 

 foundation supports, as indicated on the plan. (See 

 Cut No. B. M. - 9.) 



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