FEATURES OF HUME U-DRAINS
  1. Hume U-Drains are available in both Standard sizes (for widths � 1800mm) and Super sizes (for widths between 2100 mm and 3600 mm).
  2. Hume U-Drains are availaible both with and without Dry Weather Flow (DWF) channels.
  3. Easily handled and laid, Hume U-Drains allow for fast construction of waterways/open flow channels using high quality factory cast units with a minimum of wet concrete works.
 
DESIGN CONSIDERATIONS:
  • Hume U-Drains are designed to the requirements of BS 8110:1985 with the following concrete cover to reinforcement:
    Standard size U-Drains: 25 mm cover
    Super size U-Drains : 30 mm cover
  • Hume U-Drains are made from high strength concrete with ct 28 day characteristic strength of 30 MPa - 40MPa.
  • Hume U-Drains are designed for the standard load conditions shown below :
 
 
  • For other loading conditions or U-Drain sizes not shown in the tables here, please contact our Technical Marketing Department for a special design.
  • 50 mm diameter weepholes are provided for drainage of the retained soil which, when combined with the butt jointed units, prevent the build up of hydrostatic pressures. As such, the design does not take into consideration hydrostatic pressures.
JOINTING
Hume U-Drains are supplied with plain butt joints in standard lengths of 1 metre. Where necessary, cement mortar is normally used to fill the gap between U-Drain units.

HANDLING
The weepholes provided in the U-Drains units double up as lifting holes for handling. A spreader beam should or handling. A spreader beam should be used when slinging the units to avoid crack in the legs. (See figure)

LAYING
For most installations, Hume 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.
 
STACKING
All U-Drains should preferably be stacked uniformly on level ground.
 
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HUME CONCRETE MARKETING SDN BHD (8411-T)
Level 2, Bangunan Pan Global,
No. 1A, Jalan Tandang,
P.O.Box 21, 46700
Petaling Jaya, Selangor.
Hot-line: (603) 7785 5282
Tel: (603) 7783 3068
Fax: (603) 7785 1823
E-mail: Adam Hussein (HIMB-PJ)