Show chas F porter the dealer in building specialties keith block is furnishing the corrugated corre gated bars and expanded metal w for the armored concrete work of the 1 DC I tribune commercial street press room on this plan of strengthening concrete so 0 25 to entirely do away with all steel bean beams and other supports for fire proof construe con construe strul 18 that tion marks an epoch in building practically revolutionary it is said that the w and cost is less than to use steel beams that the strength is much greater it claimed that a we weight ht that will crush steel s beams will not eff effect e ct the reinforced or a mored concrete |