Steam power plants, their design and construction . The Eboineeriug RECORa Figure 2.—Piping in Power House ;Lockwood, Greene & foundation work should be consulted. As to the bearing capacityof different soils, the New York Building Code states : Differentsoils, excluding mud, at the bottom of the footings shall be STEAM POWER PLANTS. 9 deemed to safely sustain the following loads to the superficialfoot, namely: Soft clay, one ton per square foot; ordinary clayand sand together, in layers, wet and springy, two tons per squarefoot; loam, clay or fine sand, firm and dry, three
Steam power plants, their design and construction . The Eboineeriug RECORa Figure 2.—Piping in Power House ;Lockwood, Greene & foundation work should be consulted. As to the bearing capacityof different soils, the New York Building Code states : Differentsoils, excluding mud, at the bottom of the footings shall be STEAM POWER PLANTS. 9 deemed to safely sustain the following loads to the superficialfoot, namely: Soft clay, one ton per square foot; ordinary clayand sand together, in layers, wet and springy, two tons per squarefoot; loam, clay or fine sand, firm and dry, three tons per squarefoot; very firm, coarse sand, stiff gravel or hard clay, four tonsper square Figure 3.—Section Main Steam Piping, Lincoln Wharf Station. If loose rock is found it should be removed, solid rock shouldbe dressed off in steps with vertical risers and horizontal treadsso that the pressure will be exerted everywhere in a vertical di-rection. Solid rock will stand almost any load that can be im-posed upon it. If soil of low bearing power is found, piling isusually resorted to. Piles may be of spruce or hemlock at least 5 10 STEAM POWER PLANTS. inches in diameter at the point and lo inches in diameter at thebutt for piles 20 feet or less in length, and 6 inches at the pointand 12 inches at the butt for piles over 20 feet in length. Thebearing power of piles not driven to rock or hardpan or similarfirm material may be calculated by the Wellington formula, inwhich the safe bearing power in tons is equal to twice the weightof the hammer in tons multiplied by the height of the fall in feetdivided by one plus the penetration of pile under the last blowin inches. From a
Size: 1272px × 1963px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1900, bookpublishernewyorkmcgraw
