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Prestressed concrete poles
In the past decades, prestressed concrete poles have become popular and have replaced the traditional poles made of timber, steel or reinforced concrete. The earliest prestressed concrete poles were designed in 1933 by Freyssinet.
On a per pound basis, steel pipe is stronger in bending and is less likely to buckle in axial compression.
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Pressure balance method vs. compressed air method in pipe jacking Pressure balance method generally requires the use of mechanically operated tunnel-boring machine at its cutti
Estimation of Discharge: The estimation of discharge of a stream is necessary for determining the waterway, clearance and foundation details. Discharge is estimated from :
Q. Explain about Catch Sidings? Normally all catch sidings except those which are sanded shall be kept alive. On sanded catch siding, the rails shall be kept clear of sand for
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Q. What do you mean by Depth of Scour? The maximum scour depth in a stream can be ascertained when ever possible by actual sounding at or near the site proposed for the bridge
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