Sectional Sofa – Main Section Plans

This page contains the 3-D plans and cut sheets for building the main section of the sectional sofa.

Cut Sheet

Length (in)Count (#)
2 x 2.75 (2×6 ripped in half)852
2 x 4313
Back Section
2 x 2.75 (2×6 ripped in half)852
2 x 481.52
Bolts / Nuts & Washers1/2″ x 5″4
Pocket Screws1.75″ -> 2.5″8
Materials List for Main Sectional Frame

Start off by assembling the base –

  1. Build the outer frame using the 85″ and 31″ 2 x 2.75″ sections using a set square and some clamps to ensure that everything remains completely square
  2. Attach 2 of the 31″ 2x4s approx 3″ in from either side of the frame (these will be used for the sofa legs in the future – if you want to have the sofa legs closer to the edges then feel free to move them). These are attached along the bottom edge of the frame to provide rigidity and support.
  3. Attach the 3rd 31″ 2×4 section in the center of the base.

Next step is to assemble the back section as follows

  1. Build the outer frame using the 85″ and 17″ 2×2.75 sections from the cut list. Use a set square and clamps to ensure everything remains completely square
  2. Attach the two 81.5″ 2x4s to the top and bottom edges of the inside of the frame. These provide some additional rigidity to the frame as the webbing will actually cause the frame to bow without them (see the Instagram post!).
  3. Attach the two 10″ 2×4 pieces evenly spaced as shown in the sketch using pocket screws.

Assemble the frame

  • The design of the sofa is such that all of the individual pieces can be upholstered separately and then bolted together – this is to save on complicated upholstering work further down the line. (The only exception to this is the L-Shaped back section for the chaise)
  • On a flat surface clamp the back section up against the base making sure everything is properly aligned.
  • Using a 1/2″ drill bit, drill four 1/2″ holes along the back of the long back section and through the back edge of the base (these will be used for the bolts to hold things together)
  • Hammer the bolts through the holes until they are as flush with the framing material as possible (you can notch out a section using a bigger drill bit or a countersink bit to make this easier).
  • Add the washer and nut and bolt everything together.
  • Once you are comfortable that everything fits then disassemble the bolts and frame and get ready to add the webbing …