Overview
STRUCTURAL TECHNOLOGIES’ Lockable Dowels are utilized at temporary movement joints within post-tensioned concrete frames. Initially accommodating concrete shrinkage, these dowels are then secured using a mechanical plate and a precise application of epoxy resin.
Once locked, the dowels continue to transfer shear forces while effectively preventing further movement.
Advantages
A Lockable Dowel also provides many advantages over the site-assembled arrangement of carbon steel reinforcing bar, galvanized or plastic ducting, vent tubes and a non-specific grout, which is sometimes used by contractors.
Applications
Lockable Dowels can be used to replace pour strips at temporary movement joints in post-tensioned concrete frames. Standard systems are available for use at slab joints and retaining / core walls.
Slab-to-Slab
Slab-to-Wall
Products & Technical Data
ESDQ-L20 LOCKABLE DOWEL (SLAB-TO-SLAB)
The dowel component is manufactured from 30mm diameter stainless steel; one end features two fixed overlapping anchor discs and the other has a series of grooves to accept the Locking Plate. The cylindrical sleeve which accepts the dowel component is contained within a box-section to allow lateral, longitudinal and some rotational movement. Epoxy resin is poured into the L-shaped void former. This product has a design capacity of up to 71kN.
Edge Distance & Spacings
| ESDQ-L20 LOCKABLE DOWEL (SLAB-TO-SLAB) | ||||||||
| Slab Thickness | Design Strength Longitudinal Load | Vertical Design Strength (kip) for Various Design Joint Widths in 4000 psi Concrete | ||||||
| in. | kip | 1/4″ | 1/2″ | 3/4″ | 1″ | 1 1/4″ | 1 1/2″ | 2″ |
| 6.3 | 10.0 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| 6.5 | 10.0 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| 7.0 | 14.6 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 |
| 7.5 | 14.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| 8.0 | 18.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 |
| 8.6 | 22.5 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 10.8 |
| 9.0 | 22.5 | 13.0 | 13.0 | 13.0 | 12.8 | 12.2 | 11.8 | 10.8 |
| 10.0 | 22.5 | 14.0 | 14.0 | 14.0 | 14.0 | 13.6 | 13.0 | 12.4 |
| 11 & Above | 22.5 | 15.7 | 15.7 | 14.9 | 14.2 | 13.6 | 13.0 | 12.5 |
HLDQ-L30 LOCKABLE DOWELS (SLAB-TO-SLAB)
The HLDQ-L30 is a high load Lockable Dowel with a design capacity of up to 136kN.
Edge Distance & Spacings
| HLDQ-L30 LOCKABLE DOWELS (SLAB-TO-SLAB) | ||||||||
| Slab Thickness | Design Strength Longitudinal Load | Vertical Design Strength (kip) for Various Design Joint Widths in 4000 psi Concrete | ||||||
| in. | kip | 1/4″ | 1/2″ | 3/4″ | 1″ | 1 1/4″ | 1 1/2″ | 2″ |
| 9.50 & above | 22.5 | 30.6 | 30.6 | 30.6 | 30.6 | 30.6 | 30.6 | 30.6 |
ESDQ-L20W LOCKABLE DOWEL (SLAB-TO-WALL)
The dowel component is manufactured from 30mm diameter stainless steel, but is shorter than the ESDQ-L20 dowel. One end of the dowel is designed to fix into the stainless steel threaded anchor cast into the face of the concrete and the other end features a series of grooves to accept the Locking Plate. The sleeve component is the same as used in the ESDQ-L20.
Edge Distance & Spacings
| ESDQ-L20W LOCKABLE DOWEL (SLAB-TO-WALL) | ||||||||
| Slab Thickness | Design Strength Longitudinal Load | Vertical Design Strength (kip) for Various Design Joint Widths in 4000 psi Concrete | ||||||
| in. | kip | 1/4″ | 1/2″ | 3/4″ | 1″ | 1 1/4″ | 1 1/2″ | 2″ |
| 6.3 | 10.0 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| 6.5 | 10.0 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| 7.0 | 14.6 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 |
| 7.5 | 14.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| 8.0 | 18.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 |
| 8.6 | 18.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 10.8 |
| 9.0 | 18.0 | 13.0 | 13.0 | 13.0 | 12.8 | 12.2 | 11.8 | 10.8 |
| 10.0 | 18.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.6 | 13.0 | 12.4 |
| 11 & Above | 18.0 | 15.7 | 15.7 | 14.9 | 14.2 | 13.6 | 13.0 | 12.5 |
Post-Tensioning Engineering Support
STRUCTURAL TECHNOLOGIES’ post-tensioning specialists are committed to bringing innovation to complex projects. Our in-house design professionals have extensive experience in structural design and are active members of technical organizations such as the Post Tensioning Institute (PTI) and the American Concrete Institute (ACI).
Planning
Design
