further apart than 7 feet on colter. Where the ground is 

 net firm, plrce foundation blocjks or underpinning on 

 4 f Dot center under all outbids sills , on 6 i GOT confers 

 ur-ler all exterior sills and girts. V.'her? underpinning 

 on short centers are necessary, add sufficient material 

 to the lumber order list to provide for them. 



Foundr.tions should be either of 



(a). -6" x 6" heart cedr-r, redwood or Drjgl&o fir 

 underpinning, set upon suhstential flat stonoa of sut'j'icient 

 thickness to project at least 4 inches above the ground, 

 VLrod blocks should never n.- used for fobtinas under found- 

 ation posts . 



(b). If substantial stcnea are not available, a 

 masonry footing should be provided. Por masonry use only 

 hard stones, preferably flai; ones. All shoi\Ld be care- 

 fully imbedded on their broadest faces in mortar of 1 part 

 cement and 2 parts coarse, clean, sharp sand. Each layer 

 should be v/ell filled and flushed up on both sides and 

 firmly bondod together. Ihe tops should be made level 

 to receive the underpinning, oee Sable Ho. C-4. 



(c). Lurge stones of sufficient thickness to raise 

 the sill to & height of at least 12 inches above the 

 ground . 



(d). Blocks of masonry or concrete at least 12 

 inches high, 10 inches wide en top and 16 inches square 

 at the bottom. The top of concrete and masonry clocVs 

 should be made level to receive the sills. See Concrete 

 Section and ?able No. C-4. 



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 sometimes bo made is recognised r>s unavoid- 

 able. 



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