PRECAST & PRESTRESSED CONCRETE
Product overview
The Dynacore (hollowcore) product line is manufactured in a standard 4ft width. Standard depths are 6”, 8” and 10”, which provide economical spans to 50ft. Dynacore is a machine manufactured product using an extruded process with zero slump, high strength concrete. Once release strengths are achieved, units are cut from the continuous extrusion to project required lengths. Mild steel reinforcing, plates and inserts are not utilized with this product.
The extrusion process produces a machine finished top surface that does not receive additional roughening. Per ACI 318, the design of hollowcore slabs for composite action is usually limited to a horizontal shear strength of 80 psi. Full scale testing has confirmed this surface meets these requirements.
Small penetrations can be easily accommodated with site drilling once product is set. Large penetrations need to be well coordinated and detailed accordingly.
Key specifications
| Section | Depth | Width |
|---|---|---|
| DC6 | 6 in deep | 4 ft nominal width |
| DC8 | 8 in deep | 4 ft nominal width |
| DC10 | 10 in deep | 4 ft nominal width |
Design & detailing notes
- Dynacore is an extruded product without mild steel reinforcing, cast-in embeds or plates.
- The section sheets show load/span curves for unshored construction, with allowable live load in addition to a 15 psf superimposed dead load.
- Section properties are shown for ungrouted sections. The sheets describe ignoring shear-key grout in span design and using the full nominal 4 ft section.
- The machine-finished top surface does not receive additional roughening. The source sheets describe a horizontal shear strength limit of 80 psi for composite action under the referenced ACI 318 provisions.
- The rip-width drawing provides nominal cut widths for framing layouts. Cast-in-place pour strips complete the framing, and very narrow ripped units can present camber and sweep issues; coordinate the layout with GPRM.
- DYNACORE PACKAGE.pdf: DC6, DC8, DC10
- DYNACORE RIP.pdf: DC1.0
This summary supports preliminary product selection. Refer to the complete source drawings and coordinate final dimensions, loads and reinforcing with GPRM and the project engineer. The supplied sheets do not show an issued or revised date.
