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1. Precast Concrete Pier Foundation

The steps below show a typical concrete boardwalk construction process using precast concrete piers, supplied by PermaTrak. Depending on the soil conditions and layout of the project, PermaTrak's precast concrete piers can serve as a low-impact, cost-competitive foundation option. Piers consist of three stackable components: bases, risers, and caps. Excessive excavation of the project site is eliminated, providing owners with a boardwalk foundation suitable for minimal tree root disturbance.

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1. The PermaTrak system is manufactured by local precasters throughout the country. We own and maintain these steel production forms to ensure consistent quality control.

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2. The boardwalk's beginning and ending stations typically utilize our precast abutment piece, on a bed of granular stone or an unreinforced concrete "mud mat." Lift inserts allow for easy handling.

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3. The base component of our concrete pier foundation option spreads the load to the sub grade. Weighing around 100 lbs. each, bases can be maneuvered by hand into position.

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4. "Riser" components can be stacked for elevation changes, without any hardware required. Lifting inserts allow contractors to easily move these pieces around by hand (~80 lbs. each).

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5. "Cap" components transfer the load from the precast beams to the pier. The dimples on the top of the caps accept the spherical polyurethane pins. This pier is installed on a compacted granular base.

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6. Polyurethane "mushroom" pins connect the precast beams to the foundation elements. "Barrel" pins eliminate lateral movement while "H-Connectors" secure the boardwalk for floodplains/storm surge areas.

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7. Precast concrete beams span from cap to cap. Spherical mushroom-shaped pins fit into formed slots in the bottom of the beams. A 1/8'' rubber bearing pad strip is laid on the beams to eliminate any uneven bearing.

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8. Curved alignments are easily accomodated by adjusting the beam lengths of the inside and outside runs.

  

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9. Precast treads are easily maneuvered into place with small construction equipment such as a Bobcat with slings.

 

spud bar for treads

10. Spud bars allow laborers to adjust the treads' final position on the precast beams.

gap spacing

11. Tread installation continues while consistent 1/8'' joint spacing and boardwalk alignment is periodically checked for accuracy. 

 

tapered treads

12. Curved alignments are formed by use of tapered tread pieces.  

 

steel curb 

13. Steel curbs are a nice option for a low-lying boardwalk. We are able to work with a variety of bolt patterns to provide a clean, finished look.

 concrete curb

14. Concrete curbs are also popular choices as an add-on feature. Connecting hardware is hidden from view and curbs attach without any field drilling.

 timber post bracket

15. PermaTrak's steel brackets can be manufactured with a powder-coating, galvanized, or stainless steel finish. A 4'' x 4'' post upright fits into the bracket to allow for a variety of timber railing designs. Bolts are threaded through the boardwalk's tread gaps and connect to a bottom plate on the underside of the walking surface.

timber railing 

16. Railing options with the PermaTrak boardwalk system span a wide range. The least expensive material is typically a variation of timber: Cedar, Southern Yellow Pine, Redwood, etc.

 aluminum railing

17. Aluminum railings can also be supplied as part of a completely seamless, engineered and manufactured boardwalk system.

 steel railing

18. A custom, stainless steel railing is one of the more expensive options to complete a boardwalk project. Railing options are limited only by the creativity of the designer and end user. Although a one-sided railing may fall into the "overly-creative" category!

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