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The CASCADE Casing Spacer system replaces the old method of banding wooden skids to the carrier pipe with steel straps. Compare CASCADE's method with the obsolete one. In addition to the typical positioning design, CASCADE has also developed designs for:

  • Placing multiple carriers within one casing
  • Positioning thermally insulated pipe without damage to insulation
  • Centering small carriers within large casings
  • Positioning gravity sewer to on grade requirements

CASCADE features:

  • Low coefficient of friction - easy to push
  • Corrosion proof - eliminate backfill
  • Dielectric insulator - cathodic protection
  • Design flexibility - position carrier positively
  • Simple to use - trouble free insertion

CASCADE all stainless steel Casing Spacers are the state of the science system for inserting pipes within pipes. The old method of strapping on and greasing wooden skids is obsolete. Compare CASCADE's system with the antiquated wooden skids.

CASCADE All-Stainless Steel Casing Spacers Wooden Skids and Straps
Easily attached by a single person Require at least two sets of hands to attach
No special tools; no grease Cumbersome, time consuming, greasy. Notching and banding tools needed.
Slide into casing with minimum pushing force. Low coefficient of friction lets runners glide over rough spots insuring trouble free insertion. Hard to push. Catch on weld beads. Carrier rotates. Joints are destabilized. Binding can break straps or skids, making removal and reinsertion necessary.
Coefficient of Friction = .12 Coefficient of Friction = .85
Virtually corrosion proof. Dielectrically insulates carrier and holds securely without any backfill. Corrodes. Requires backfill to insure long-term stability.
No backfill. Lowers construction costs and allows for future access. CASBackfill of sand, gravel or grout is expensive and makes future access difficult or impossible.

CASING SPACERS - Specifications

Casing spacers shall be made from T-304 stainless steel of a minimum thickness of 14 gauge.  Each shelll section shall be a minimum of 12" wide and two piece design up to 54" diameter and three piece design up to 90", over 90" in diameter shall be a four piece design.  Each shell section shall have a reinforced bolt and receiver bar T-304 TIG welded to the shell.  Bolts shall be 5/8" - 11 x 6 1/2" lg. T-304, each bolt bar shall include three bolts, each bolt bar assembly shall allow a maximum of 1" adjustment to the circumference, to compensate for the tolerances in the RCP pipe.  The shell shall be lined with a ribbed PVC extrusion with a retaining section that overlaps the edges of the shell and prevents slippage.   Bearing surface (runners) shall be ultra high molecular weight polymer with high abrasion resistance and a low coefficient of friction.  The runners shall be attached to support structures (risers) at appropriate positions to properly support the carrier within the casing and to ease installation.  The runners shall be attached mechanically by punched riser section and bolt heads TIG welded for strength. Risers shall be made of T-304 stainless steel of a minimum 10 gauge.  All risers over 6" in height shall be reinforced.  Risers shall be MIG welded to the steel.  The height of the risers and runenrs combined with the bolt bars shall be sufficient to provide not less than three fourths inch between the bell and the outside diameter of the carrier pipe.  All welds and metal surfaces shal be chemically passivated.

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Last modified: July 27, 1999