• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Laser Method of Laying Pipe - 14071_221
Figure  10-23.Handhole. - 14071_223

Engineering Aid 2 - Intermediate Structural engineering guide book
Page Navigation
  201    202    203    204    205  206  207    208    209    210    211  
measured to the elevation prescribed for the bottom of the duct, plus the thickness of the concrete encase- ment, if any. In an underground power system, the bottom of the manhole is usually about 2 feet below the  bottoms  of  the  incoming  and  outgoing  ducts. Power and communications manholes are often com- bined;  figure  10-22  shows  plan  and  section  views  of  a combination power and communications manhole. Conduit   and   cable   connections   to   buildings, street-lighting  systems,  traffic  light  systems,  and the  like,  are  low-voltage  secondary  lines.  Duct connections from main-line manholes run to small- subsurface  openings  called  handholes  on the sec- ondary line. The handhole contains connections for takeoff to the consumer outlet. Figure 10-23 shows plan  and  section  views  of  a  handhole. Construction Sheets Several construction situations have been men- tioned in which line and grade for construction are obtained from a line (or perhaps from two lines) of Figure 10-22.—Combination power and communication manhole. 10-22







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.