WHY USE IT?
In order to meet a designed clearance requirement that is unusual and cannot be provided with a ShaftSpacer wheel alone.
Hairpins are also used when the close spacing of the horizontal or spiral steel reinforcement prevents the ShaftSpacer wheel from being used as a standalone application.
Extension device used in tandem with the ShaftSpacer wheel in order to achieve eccentric spacing requirements and/or meet seismic design considerations.
- Bridge Foundations
- Building Foundations
- Retaining Wall Foundations
- Street Light Foundations
- High Mast Foundations
- Transmission Line Foundations
- Sub-station Foundations
- Tower Foundations
- Slurry Walls
- Saves time & money onsite
- Easy to install
- Lightweight, yet strong, durable
- Engineered with the contractor in mind
- Excellent guide system for placement of fabricated rebar cages into drilled or excavated shafts
- Economical with minimal installation costs
- Customizable to suit any project challenge.
- Insures the bar reinforcement is properly spaced and aligned within the confines of the drilled shaft or excavation.
- Provides quality assurance for the contractor and owner of the sub-contractor’s performance.
- Provides quality assurance for the engineer and owner of the contractor’s performance.
- Installs quickly and easily requiring only unskilled labor.
- Increases job profitability because skilled labor is released for more demanding tasks.
- Has low labor requirements resulting in project cost savings.
UNUSUAL DESIGN CLEARANCE
Example: the project specification and detail states 9 inch clearance. To achieve this clearance with a wheel alone, the wheel would need to have a diameter of approximately 18 inches. By using a Hairpin bar in conjunction with one of our standard model ShaftSpacer wheels, the 9 inch clearance can be achieved.
CLOSE SPACING OF HORIZONTAL STEEL
Example: the project specification and detail states 6 inch clearance, but the pitch of the spiral is 4 or 5 inches. Therefore, the ShaftSpacer wheel that is normally used for 6 inch clearance is too large and will not attach without interfering with the adjacent spiral bars. A Hairpin is then used to resolve the problem.
Guiding rebar cage into drilled shaft with Hairpin and ShaftSpacer system attached
*When combined with a ShaftSpacer wheel, cover will be increased by this amount. All models are powder coated.
Hairpin attached to rebar cage
Cagecaster tied to horizontal reinforcement hoops