How to Make a Rhomba Concrete Bench

This bench, designed by Fu-Tung Cheng, is easy to make in either fiber-reinforced or traditional wet-cast concrete.  The end pieces support a wooden seating section which can be made from a range of wood species.  The concrete end pieces are formed with melamine-coated particle board which is also readily available from our local lumber supplier.  If you’re careful when de-molding, you should be able to reuse the form for many castings.

One: Forming

Use quality materials when building this form to insure the form can be used for multiple castings. This form was used for over twenty castings.

Two: Casting

We prefer to hand place the fiber reinforced concrete mixture onto horizontal surfaces and allow a few minutes for the recently placed…

Three: Demolding

Carefully dismantle the form by removing all the drywall screws before extracting the concrete casting and take precautions to assure the….

Four: Finishing

For our Rhomba Bench we decided to use cedar 2 x 4’s that were available at our local lumber yard and relatively affordable.