Expansion Shell
ES
Quantity:
Expansion Shell
Yidao rock anchor expansion shell is used for fixing single-sided shuttering or similar structures in rock, concrete or comparable load-bearing ground. When installing the expansion shells, please consult the separate installation instructions available upon request.
Expansion shell many diameters available (various lengths), to fit for rock anchor bars diameter 15mm, 20mm, 24, 25mm etc.
Dimensions & mechanical properties
| Bar dia/mm | hole size/mm | shell length/mm | wedge length/mm | net weight/kg |
| M15 | 26 | 54 | 41 | 0.12 |
| M15 | 31 | 54 | 50 | 0.15 |
| M20 | 35 | 83 | 54 | 0.24 |
| M24 | 45 | 83 | 57 | 0.6 |
Key Features
- Expansion shell rock anchor hold in any rock strata which is sufficiently competent to provide an adequate anchorage. They are designed to anchor in soft ground or hard rock. In good strata, the anchorage exceeds the ultimate strength of the steel bolt. All expansion shells require a competent strata in the anchor zone. The suitability of the anchorage and the specific expansion shell to be used is best determined by physical load testing.
- Expansion shell feature parallel contact with the hole wall with sharp serrations on the outside leaves ensuring positive holding power.
- The expansion shell rock anchor assembly is securely held by a strong protective sleeve, to save installation time and prevent loss of parts while handling. The sleeve must be removed prior to installation.
- Corrosion protection may be provided by hot dip galvanizing or zinc plated.
Advantages
- Fast and simple installation in rock anchor
- Offering immediate support for rock anchor
- Dimensional diversity of the length of the expansion shell