A practical guide to designing and building underground conduits for reliable telephone service, with step-by-step procedures and real-world details.
This edition compiles the design, construction, and operation of underground conduits for telephone exchanges. It covers the full process from initial trenching and duct installation to testing, rodding, and ensuring water tightness, with practical examples, specifications, and material lists.
Readers will gain concrete guidance on setting up conduits, assembling mandrels and rodding equipment, handling bonds and contracts, and calculating costs and maintenance over the life of a system.
- Concrete and brick manholes, duct materials, and installation details.
- Rodding procedures, mandrel design, and procedures to clear ducts.
- Testing, water-tightness requirements, and methods of preventing leaks.
- Bills of material, costs, and annual charges for depreciation and maintenance.
Ideal for engineers, contractors, and students studying early telephony infrastructure and its practical construction challenges.