Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 337
hree-sixteenth-inch square, cold-twisted steel. These rodsare embedded in the concrete, filling the spaces between the prisms, binding the mass,and forming an indestructible support. The prisms are two and nine-sixteenthsinches square on the surface, and have a scientifically formed pendant… … Fig. 9. SIDEWALK PRISMS, SECTIONAL VIEW The method of construction is the same for these lights as for the prisms. Thelights are two and three-quarters inches in diameter, having a concave under-surface,and so designed as to admit the maximum amount of light to the space below.(Fig. 10.) ai « -bit…
Building materials
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