Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 189
Fig. 151. PLAN In Boston the usual soil encountered is a stiff blue or yellowclay, 15 feet or more thick and underlaid with a boulder clay ofvarying depth, but generally of from 15 to 75 feet. Under theseconditions footings for isolated columns are very commonly madeby offsetting the masonry until… … a ao « u V o <B S3 o O so o o au a) O cfl d Q S <: S3 o -^ J 5 _ :3 :^ ^ M c3 ^ Q < o <Hto ®.aw *^ iJ CO I ^ ft to *& o ^ O CO• <D ja oH 15 a 3 WD ♦:> c ft a_o c3 ■aa 3o (U S3 . - -3 <D > c3 ^u a 03
Architecture · Building · Carpentry
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