Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 84
zfc:z^5^.=- ^JE … Fig. 6. DUPLEX I BEAM BOXFor 20 I Beam Fig. 7. DUPLEX POST CAP The Caps are made of mild steel i thick for Caps up to 12x12 Posts. For larger sizes heavier plates are used.The Caps adapt themselves to every possible construction and we carry a complete stock- SIZES ANDPRICES.…
Building materials
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