Providing a full strength structural joints in critical hinge zones
Grout Sleeves offer a splicing solution for reinforcing bars, and achieve a full-strength structural connection in critical hinge zones. Suitable for use in seismic loading situations, Grout Sleeves are designed to exceed the ultimate strength of Reidbar so that they will always “break the bar”.
Hooked and bent bars have been the standard method for providing anchorage for reinforcing steel in concrete, where the standard bond length for straight deformed bars cannot be achieved. When hooked anchorages do not have the development length required by the code (200mm for a 12mm 500E bar) crushing of the concrete around the inner radius of the hook will occur. A hooked bar with insufficient anchorages can slip by more than 2mm at 60% of the yield strength of a 500E bar. This could result in 70mm of deflection at the top of a cantilever precast wall.
Using Grout Sleeves eliminates the need for any starter bars protruding from precast elements, that are liable to be damaged or bent during transportation, and provides ease of handling on site.
Reid provide design criteria, typical construction details and recommendations in their Reidbar Design Guide found in the resource section of the website.
- Develops full ultimate strength of the bar in ten bar diameters rather than forty bar diameters with duct or lapped slices.
- Can provide full cantilever moment connections at the base and top of precast columns and walls
- Used in critical stress zones
- Eliminates cover issues with lapped bars
- Removes the need for in-fill pours between precast elements
- Speeds up construction by reducing the requirement for poured insitu joints
- Grout sleeves are available in all bar sizes 12, 16, 20, 25 & 32.
Browns Rd Bridge – Case Study
View video – YouTube