Chest Riser for Adaptable System on Prone Adaptive Surfboard

This Jabali 5'4" wooden surfboard has been retrofitted with US fin boxes on the deck, allowing prone adaptive surfers to add and personalize various attachments. This setup makes it easier to test and use different attachment configurations.

This chest riser is the are the last of three attachments I designed for this system, with a focus on sustainable materials and creating an accessible design that is easily replicable and adaptable to the surfer’s needs.

You can find the other attachments and components on my profile.

This project was part of research on adaptive surfing conducted at the University of Ghent for my Master’s thesis. If you have any questions, feel free to contact me at charlie.debreuck@gmail.com.

Sustainable Materials Used

This piece was designed entirely using unused or waste materials:

1. Old wetsuit: Reused as durable, ocean-resistant fabric
2. Expanded cork insulation: A lightweight insert material, also suitable for use in water
3. Sewing machine: Used to assemble the components

I encourage you to also repurpose waste and unused materials in your own build to make the design more sustainable.

Everyone should determine the wedge dimensions based on their own preferences and needs. However, here are some recommended starting dimensions for reference.

Note:

During user testing, the riser felt too aggressive. A broader and more gradual slope may provide a more comfortable and functional experience.

Form the insert according to the dimensions you’ve determined. Make sure the shape fits your specific setup and provides the desired level of support or elevation.

Use the insert as a reference to cut out the fabric pieces, adding 1 cm of seam allowance on all sides.

Next, determine the length of the straps by measuring the distance between the fin boxes on your board.

1. Attach the triangular side panels to the bottom of the main fabric panel.
2. Sew the straps onto the appropriate positions.
3. Attach the front rectangular panel, incorporating a zipper to allow access for inserting or removing the wedge.
4. Close the cover by sewing the remaining edges together, enclosing the insert completely.

User Testing Update:

To improve grip during surf sessions, add a textured top surface. This can be done by gluing or sewing cork pieces or another water-resistant material onto the top panel to prevent slipping.

Turn the sewn cover inside out so that all seams are hidden on the inside.

Then, insert the cork wedge(s) through the zippered opening to complete the assembly.

Secure the chest riser to the board using sliding nuts inserted into the fin box system. Fasten it with M6 bolts and washers.