U-DRAIN

Introduction

U-Drain

SGC U-Drains allow for fast construction of open flow channels using high quality factory cast units with a minimum of wet concrete works. SGC U-Drains also come with or without Dry Weather Flow (DWF) channels. With ease of handling and installation of SGC U-Drains, construction progress will be less affected by adverse weather and thus reduce construction period and cost.


Design Consideration

  • SGC U-Drains are designed to the requirements of BS 8110:1997
  • SGC U-Drains concrete cover to reinforcement: 25 mm
  • SGC U-Drains are manufactured from high strength concrete with a 28 days characteristic strength of 30 MPa to 40 MPa.
  • SGC U-Drains come with 50mm diameter weep holes for drainage of the retained soil. This helps to prevent build up of hydrostatic pressures when combined with the butt jointed units. Hence, the relieved hydrostatic pressures are not taken into consideration in the design.
  • SGC U-Drains are designed for the two(2) standard surcharge loading conditions as shown below:

Handling

Handling

The weep holes provided in the SGC U-Drains units will be used as lifting holes for handling.

A spreader beam should be used when slinging the units to avoid crack in the leg.

Stacking

Stacking

SGC U-Drains should be stacked uniformly on level ground.

Laying & Jointing

Laying & Jointing

SGC U-Drains may be laid on sand bedding. However, in bad ground, it may be necessary to excavate deeper and place a layer of hard core before placing the sand bedding. SGC U-Drains are designed with plan butt joints in standard length of 1m. Where necessary, cement mortar is normally used to fill the gap between U-Drain units.


SGC U-DRAINS & U-DRAINS WITH DRY WEATHER FLOW
STANDARD SIZE SGC U-DRAINS SPECIFICATIONS

For standard size SGC U-DRAINS specifications, we have the following nominal sizes (mm):

  • 600x300
  • 600x450
  • 600x600
  • 750x300
  • 750x450
  • 750x600
  • 750x750
  • 900x300
  • 900x450
  • 900x600
  • 900x750
  • 900x900
  • 1200x300
  • 1200x450
  • 1200x600
  • 1200x750
  • 1200x900
  • 1200x1050
  • 1200x1200
  • 1500x600
  • 1500x900
  • 1500x1200
  • 1500x1500
  • 1800x600
  • 1800x900
  • 1800x1200
  • 1800x1500
  • 1800x1800