280mm W Strap

General Features

• W Strap is commonly used when additional support is required in conjunction with rock bolts. These steel straps are pulled into the rock surface by the bolts and tend to conform to major irregularities in the rock.
• W Straps provide a large surface confinement to any loose rock that may form between installed rock bolts.
• W straps have a range of supply options:
  1. Multi-hole on 300mm centres or ‘set holes’ to suit individual applications. Note that 44mm hole diameter is standard. Other hole diameters are available by negotiation.
  2. Elongated holes, 85x35mm, can be provided either in set locations in conjunction with round holes or fully multi-holed.
  3. Transverse elongated holes, 85x35mm, can be supplied in conjunction with items 1 & 2 by negotiation. "Service Line" slots, 28x8mm, can be supplied through one set of the W Straps vee’s.
  4. These service line slots can be provided either in a multi-hole configuration or in set locations to suit individual needs. Refer to Section E for the range of brackets available to suit the service line slots. Domed or high angled deflection plates can be supplied welded to individual holes along the W strap as required.
     Steel mesh sheets can be supplied welded to the underside of these W Straps.
• Corrosion protection may be provided by hot dip galvanizing (refer to Section G)

Installation Guide Lines

• Refer to DSI Arnall "Practical Guide to Rock Bolting" for installation practices.

Standard Lengths & Packaging

• Standard W Strap lengths range from 600 to 8000mm in 300mm increments.
• W Straps are packed in bundles.
• Non-standard requirements are available by negotiation.

Notes

• Only DSI rock bolt components should be used in order to obtain full performance of the bolt system.
• DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.