Commercial Boardwalk Railings - Design Information
Engineers and landscape architects have plenty of material options in designing a boardwalk's railing system, including:
- Steel (powder coated, galvanized or stainless)
Below are some important boardwalk railing design items to consider, regardless of the type of boardwalk material specified:
- Boardwalk railings are designed per Section 13 of the AASHTO LRFD Bridge Design Specifications. This live load consists of a uniform load of 50 plf and point load of 200 lbs applied per AASHTO.
- Per the International Building Code, a railing measuring a minimum 42 inches from boardwalk surface is required where the boardwalk surface to grade elevation exceeds 30 inches (See "Section 3.9.2 - Geometry" in Railings Section of AASHTO LRFD Bridge Design Specifications). This is also in accordance with AASHTO Guide for the Development of Bicycle Facilities.
- Otherwise, where the grade separation is less than 30 inches, curbs may be used as a “warning bumper” or “toe curb," although they are not required.
- Local code requirements for bicyclist applications determine whether the railing needs to be 42 inches or 54 inches tall.
PermaTrak Railing Connections
The PermaTrak system allows for a variety of railing options. Railings range from utilitarian timber or simple powder-coated steel to ornamental aesthetic railings.
Take a look below for more details on connecting different railing types to a PermaTrak concrete boardwalk.
1. Timber Railing Connection with Steel Bracket
The photos here show a top mounted steel bracket. PermaTrak supplies the bracket and would pre-form holes in the treads where needed so that the contractor does not have to drill in the field. The bracket can be powder coated as shown in the photos or galvanized. There is a minimal cost difference for the upgrade to galvanized steel brackets.
This type of connection is used for railing types #1-6 as shown below.
Typically, the railings are connected via a threaded bolted connection passing between the treads at the joint. Nut and plates are installed on the underside of the treads.
Boardwalk Railings - Estimated Pricing Graph
Railing Types Commonly Used with PermaTrak Boardwalk System
Below are some different railing types we have seen used in conjunction with the PermaTrak boardwalk system. While PermaTrak does not supply these railing and have not created any specifications, we have been involved in many boardwalk designs and have assembled a library of details and specifications from other designers. Contact us with your boardwalk railing questions, we're happy to help.
1. Basic Southern Yellow Pine timber boardwalk railing at Osprey Harbor Observation Deck near Sarasota, FL.
2. Timber picket style railing at White Oak Greenway in Cary, NC.
3. Timber railing with steel grab rail at Blackwater National Wildlife Refuge in Blackwater, MD. See Friends of Blackwater NWR for more information.
4. Aluminum railing with wire mesh panels at Spencer Creek in St. Peters, MO.
5. Composite railing at Piedmont Crossing Retirement Community in Thomasville, NC.
6. Composite railing at Live Oak Park observation deck - The Villages, FL.
7. Aluminum picket style railing by SpecRail at Beckett Park wetland boardwalks in West Chester, OH.
8. Galvanized steel railing on boardwalk at White Rock Creek Greenbelt Trail in Dallas, TX.
9. Brushed, marine grade aluminum upright posts with stainless steel cable strands at Van Wezel Performing Arts Center in Sarasota, FL.
10. Timber posts with stainless steel cable strand railing at Adams Park in Atlanta, GA
11. Galvanized steel posts with stainless steel tensioned cable strands at McMullen Greenway in Charlotte, NC
12. Stainless steel tensioned cable strand railing at Chincoteague National Wildlife Refuge (owned by US Fish and Wildlife) in VA.
PermaTrak Concrete Curbs
As mentioned above, on boardwalk applications where the walking surface is less than 30'' above grade, PermaTrak can supply a precast concrete curb, otherwise referred to as a "toe curb."