A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 207, — Cores for Concrete Piles. (5ee ^.650.) FOUNDATIONS AND PIERS 6S3 driven at the age of thirty to forty days. The usual drop was 3 feet,but in some cases this was increased to 10 feet without injuring the pile. The designs drawn up in 1903 for the Pennsylvania Railroad Tunnel*under the Hudson River call for a shell of cast iron surrounded by con-crete and supported at intervals by steel screw piles filled with concrete. Sheet Piling. Poling boards of concr

- Image ID: 2AJ4TYB
A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 207, — Cores for Concrete Piles. (5ee ^.650.) FOUNDATIONS AND PIERS 6S3 driven at the age of thirty to forty days. The usual drop was 3 feet,but in some cases this was increased to 10 feet without injuring the pile. The designs drawn up in 1903 for the Pennsylvania Railroad Tunnel*under the Hudson River call for a shell of cast iron surrounded by con-crete and supported at intervals by steel screw piles filled with concrete. Sheet Piling. Poling boards of concr
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Image ID: 2AJ4TYB
A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 207, — Cores for Concrete Piles. (5ee ^.650.) FOUNDATIONS AND PIERS 6S3 driven at the age of thirty to forty days. The usual drop was 3 feet,but in some cases this was increased to 10 feet without injuring the pile. The designs drawn up in 1903 for the Pennsylvania Railroad Tunnel*under the Hudson River call for a shell of cast iron surrounded by con-crete and supported at intervals by steel screw piles filled with concrete. Sheet Piling. Poling boards of concretewere employed by Mr. Howard A. Carson,>ND _ Chief Engineer in the construction of theapproaches to the East Boston Tunnel.These are describedf as follows: SURFACE OF rag I.

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