Image
PRECAST & PRESTRESSED CONCRETE
Product overview
Bridge Planks are available in a number of depths and are usually detailed in 48” modules. Bridge plank structures are popular in low lying areas of Hawaii due to a combination of road elevation and flood clearance constraints. Voided slabs should be considered for deeper plank sections. The shear key is standardized for all depth sections based on AASHTO/PCI details and should be adopted if possible.
Categories
Key specifications
| Specification | Source detail | Design considerations |
|---|---|---|
| Nominal module | 48 in | Depth selected for the project |
| Standard depths tabulated | 10, 12, 14, 16, 18, 20, 22 and 24 in | 2 in increments |
| Shear key | Standardized AASHTO / PCI detail | Common detail across depths |
| Possible strand layout | Bottom row with subsequent rows at 2 in spacing | Final prestressing by project design |
Design & detailing notes
- The BP drawing provides section properties for each listed depth, including area, moment of inertia and unit weight.
- Voided planks should be considered for deeper sections.
- Bottom strand position is governed by cover, reinforcing and tolerance requirements.
- For non-standard widths, sections or alternate prestressing options, consult GPRM.
- Similar sections are also used for wharf deck units, as noted in the source drawing.
Source drawings
- BRIDGE PLANK.pdf: BP
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.
