Fireproof construction : for houses and other buildings of moderate cost (1911)
National Fire Proofing Company, Pittsburgh · Pittsburgh : National Fire Proofing Co. · leaf 84
on System Floor. The Johnson Floor has been used in spans up to 25 feet, with entirely satisfactory resultsin every way. It is constructed chiefly of Terra Cotta Hollow Tile Blocks, the standard fire-proofing material, which cannot be molecularly damaged by fire. This floor construction is the… … NAT10NAI.F1REPRGDF1NC•CO^^PANY• QHGANIZCU HM /^/lie/teJsame o^s //ofe /(fe use of^/fyo/B££/<>c^s
Hollow tiles · Building, Fireproof
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