Blaw-Knox Company (Pittsburgh, Pa.) · Blaw-Knox Co. · leaf 15
CO uO E I C 3 .a T3C .2 o u „ ss 8U x: ^ - &fl C u — o o CQ s bfi Fifteen BLAWFORMS FOR LIGHT WALLS AND FOUNDATIONS … Fig. 12. Blaw Light Wall Forms on circular caisson construction forPittsburgh Spring Steel Company. Pihl and Miller, contractors
Building materials · Concrete · Formwork
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