A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
How Portland contractor lays steel water main
Laying of approximately 4 1/2 mi of 36-in. diam 3/8-in. thick welded steel water main in 8-ft cut in various streets of Portland, Ore, was performed with new type of pavement breaker operating on triphammer principle; this procedure made possible high speed excavation; welded joints were tested with aid of compressed air so that imperfections were disclosed by leakage of air. (see also Western Construction News v 21 n 6 June 1946 p 90-2)
How Portland contractor lays steel water main
Laying of approximately 4 1/2 mi of 36-in. diam 3/8-in. thick welded steel water main in 8-ft cut in various streets of Portland, Ore, was performed with new type of pavement breaker operating on triphammer principle; this procedure made possible high speed excavation; welded joints were tested with aid of compressed air so that imperfections were disclosed by leakage of air. (see also Western Construction News v 21 n 6 June 1946 p 90-2)
How Portland contractor lays steel water main
Pac Bldr Engr
1946
3 pages
Article (Journal)
English
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How Portland contractor lays steel water main
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