A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 273
eep, failed by buckling underan eccentric load of 885 pounds per square foot. 177. Setting.—Segmental arches are laid in the sameway as flat arches, with the exception that the centers aresuspended on hooks from the beams, and can be raised orlowered by nuts threaded on the lower end of the hook… … The pieces are made of dense fireclay tile, the upper part abeing semicircular, and cut, as at b, to rest on the beams;this cut-out is suf^cient to leave a -J-inch air space betweenthe beam and the flat under surface c, which extends to themiddle of the support, as at d, forming, with the air…
Architecture · Building
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