Illinois Society of Architects · Chicago · leaf 295
«9Cp£P°f gL Buiidi„g 8301 to 8457 Stewart Avenue m Michigan Boulevard Chicago, III.Telephone Stewart 870 Telephone Harrison 21 Established 1856 Incorporated 1898 A. BOLTERS SONS MANUFACTURERS AND BUILDERS OF STEEL AND IRON STRUCTURES Iron FoundersOrnamental Iron Work Main Office and Works: Ward… … o / <? j 4 s~ £ 7 a 9 /o // /e in.—a reduction of over 20 per cent. If themix were changed to 1:4% and other factorsthe same as in the first example, the strengthwould be 3,200 lb. per sq. in. We shouldhave to change the mix to as lean as 1:514in order to secure the same reduction instrength as…
Architecture · Building · Architects
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