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Build It | Modern Platform Bench

This Old House general contractor Tom Silva and Kevin O’Connor use strips of hardwood decking to create a slatted bench inspired by an iconic mid-century furniture design. Get the full plans and instructions to build your own George Nelson-inspired modern slatted bench.

Given the popularity of mid-century modern furniture, Tom Silva sensed a great Build It opportunity when his son showed him a reissue of the George Nelson platform bench. Tom saw that the clean lines of the elegant 1946 design were achieved with straightforward woodworking techniques: the bench top’s half-lapped strips would be easy work for a table saw and router. The legs’ trapezoidal shape might pose more of a challenge, but loose-tenon joinery could take care of that.

Instead of the birch used in the original, Tom chose to make the bench out of ipe decking, a dense hardwood that’s prized for its rich hue, knot-free surface, and durability. Its sawdust can irritate nasal passages, so he and Kevin O’Connor hooked up their tools to vacuums when sanding and cutting it.

It took them 4 hours to assemble this bench, with $100 in materials. Not a bad investment for a reproduction piece that normally retails for around $1,000.

How the Bench is Made

Spring 2021, Build it, Modern Platform Bench, overview illustration Peter Sucheski

Steps for Building a Modern Platform Bench

1. Prepare the slats

Spring 2021, Build it, Modern Platform Bench, step 1 Anthony Tieuli
  • Using a table saw, rip the decking in half, to about 13⁄4 inches wide.
  • For the legs, rip the stock down to 21⁄8 inches wide.
  • Sand the sharp corners made by the saw.

2. Cut the leg pieces

Spring 2021, Build it, Modern Platform Bench, step 2 Anthony Tieuli
  • Mark the length of each leg piece, then use a miter saw to miter the ends of all eight leg pieces. (See “How It’s Made,” above, for the angle of each cut.)
  • Fit the ends tightly together and draw two parallel pencil lines 1 3⁄4 inches apart across each joint.

3. Make the mortises

Spring 2021, Build it, Modern Platform Bench, step 3 Anthony Tieuli
  • Set the angle of a Domino joiner fence to match the miter angle of a leg piece.
  • Line up the joiner with one pencil line and plunge its bit into the leg’s end grain. Do the same at the neighboring line.
  • Repeat on the ends of every leg piece, until you have a total of 16 mortises.

4. Assemble the legs

Spring 2021, Build it, Modern Platform Bench, step 4 Anthony Tieuli
  • Squeeze glue into the mortises on both sides of a leg joint; insert the tenons into the mortises on one side.
  • Spread glue over the end grain on both leg pieces, and push them together. Do the same on all eight leg pieces.

5. Clamp the leg assemblies

Spring 2021, Build it, Modern Platform Bench, step 5 Anthony Tieuli
  • Tighten two bar clamps on the top and bottom of each leg assembly, and leave them in place for at least 30 minutes.
  • Check that all the joints are aligned, and wipe up any glue that squeezes out with a damp rag.

6. Rout the slats

Spring 2021, Build it, Modern Platform Bench, step 6 Anthony Tieuli
  • Build a sled for the router to gang-cut the 3⁄4-inch-wide dadoes in the slats.
  • Clamp the long slats together between a pair of long 2x3s set on edge; place the sled on top of them and clamp it down, too. Make three or four shallow passes until the notches are 7/8 inch deep.
  • Shift the position of the sled and rout the three remaining sets of dadoes in the same way.
  • After each set is done, fit a scrap crosspiece in the freshly cut dadoes to keep the slats from shifting.

7. Notch the crosspieces

Spring 2021, Build it, Modern Platform Bench, step 7 Anthony Tieuli
  • Clamp together and rout dadoes in the four crosspieces, using the method in Step 6. Each piece will end up with 10 notches.
  • When you’re done routing, unclamp them and sand both faces of each piece, as shown.

8. Assemble the top

Spring 2021, Build it, Modern Platform Bench, step 8 Anthony Tieuli
  • Squeeze a dab of wood glue into the bottom of the notches in all the slats and crosspieces.
  • Fit the downward-pointing notches of the first slat into the first row of upward-pointing notches in the crosspieces.
  • Tap the slat into place with a rubber mallet. Repeat with the remaining slats.
  • Wipe up any glue that squeezes out.

9. Fasten the top’s joints

Spring 2021, Build it, Modern Platform Bench, step 9 Anthony Tieuli
  • Use a countersink bit to drill into the center of each stringer where it laps a crosspiece. Then drive a deck screw into each pilot hole.
  • Wipe away any drips.

10. Trim the slat ends

Spring 2021, Build it, Modern Platform Bench, step 10 Anthony Tieuli
  • Cut the projecting ends of the slats flush with the crosspieces. This can be done with a track saw or a Japanese flush-cut handsaw.
  • Smooth the end pieces with 100- and 180-grit sandpaper.

11. Attach the leg bases

Spring 2021, Build it, Modern Platform Bench, step 11 Anthony Tieuli
  • Locate them so they’re equidistant from the sides of the bench and 8 inches from the ends.
  • Use a large rafter square to set one base perpendicular to the bench top’s edge. Drill four pilot holes through the base and into the slats, as shown.
  • Drive a screw into each hole. Repeat with the other leg base.

12. Mount the legs

Spring 2021, Build it, Modern Platform Bench, step 12 Anthony Tieuli
  • Center each leg on its base; drill four pilot holes into the leg’s top piece.
  • Drive screws into the pilot holes. The bench is now ready to be finished and to take its place in your home.


Tom and Kevin built the bench out of ipe deck boards, which can be found at any home center. Tom liked the idea of ipe for the bench so it could be used for either an indoor or outdoor application.

To cut all the boards to the proper dimensions and assemble the bench, Tom used a variety of tools, including a Domino Joiner, a Kapex KS120 sliding compound miter saw, a TS 55 circular saw, which are all manufactured by Festool, and an Industrial Table Saw from SawStop.

Tom and Kevin secured everything together using GRK #8 1-1/2” multi-purpose screws from GRK Fasteners and some wood glue from Gorilla Glue.

All of the other tools and materials Tom and Kevin used to build the bench can be found at home centers.