Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 199
aving the other two-thirds of that material.The Unit Girder Frame can be used in any span up to 75 feet. Our leading architects and engineers are now convinced that, by the use of thisessentially modern material, the cost of an edifice may be reduced from fifteen tothirty per cent, below the cost…
Building materials
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