PermaTrak on Timber Pile Foundation
In applications through a wetland or over water, timber piles may be the most cost-effective foundation option.
Our PermaTrak system is easily installed on a timber pile foundation, as is common with timber or composite boardwalk construction. Once a pile is driven to the specified depth a precast concrete cap is secured to each pile with a lag bolt, setting the template for the rest of the boardwalk construction process.
1. The PermaTrak concrete boardwalk system is manufactured by local precasters throughout the country. We own and maintain these steel production forms to ensure consistent quality control.
2. The boardwalk's beginning and ending stations typically utilize our precast abutment piece, on an unreinforced concrete leveling pad. Lift inserts allow for easy handling.
3. Caps are secured to timber piles, setting the template for the rest of the boardwalk. Cap components transfer the load from the PermaTrak boardwalk components to the timber piles.
4. Caps are aligned and measured for correct spacing per the installation drawings. A lag bolt is drilled through the center precast hole down into the pile for a secure connection.
5. A non-shrink grout fills the pile-cap connection for long-term durability. The dimples on the top of the caps accept spherical polyurethane pins.
6. Spherical, polyurethane "mushroom" pins connect the precast beams to the foundation elements.
7. Reinforced, precast concrete beams span from cap to cap. The spherical "mushroom" pins fit into formed slots in the bottom of the beams (hidden in picture).
8. A 1/8'' rubber bearing pad strip is laid on the beams to eliminate any potential uneven bearing.
9. Curved alignments are easily accomodated by adjusting the beam lengths of the inside and outside runs.
10. Precast treads are easily maneuvered into place with small construction equipment. Spud bars or crow bars used from underneath the boardwalk allow installers to adjust the treads' final position on the precast beams without damaging the finished walking surface.
11. Tread installation continues while consistent 1/8'' joint spacing and boardwalk alignment is checked for accuracy.
12. Curved alignments are formed by use of tapered boardwalk tread components. See our Engineering Layouts page for more information on horizontal alignment and minimum radii.
13. Precast concrete curbs (supplied by PermaTrak) are also popular choices as an add-on feature. Connecting hardware is hidden from view and curbs attach without any field drilling.
14. PermaTrak's steel brackets are manufactured with a galvanized steel finish. A 4'' x 4'' timber post fits into the bracket to allow for a variety of timber railing designs. Bolts connect to a bottom plate on the underside of the walking surface.
15. Railing options with the PermaTrak boardwalk system span a wide range. This timber railing has a steel grab rail to meet ADA requirements. See Railings for pricing and design information.
16. Aluminum railings can also be supplied as a cost-efficient boardwalk railing. See "What Types of Railings Does PermaTrak Offer?" for more information.
17. A stainless steel railing with cable strands offers a transparent look, but is one of the more expensive options to complete a boardwalk project.