Canal bed shell

摘要: A canal bed shell for use in a manhole construction consisting at least partially of tubes and carrying liquid medium has U-shaped or V-shaped cross section. On one end the is continuation defined by tube portion which integrally formed with can be tightly connected tubes. The height as measured from bottom to upper boundary edge great internal diameter said passes over stepless manner into area shell. If required, arcuately bent provided side-channel crossings. In preferred form invention berm integral includes recessed shoulder receives vertical shaft element thereon.