Carpenter's Couch

Disclaimer: I'm not a trained or licensed carpenter, but I'm confident, that a skilled carpenter can build this in less than 15 min with a nail gun.

Weight limit: unknown (>170 kg)

Part list:
- Seat frame:
-- 1 m x 60 cm OSB 18 mm or greater
-- 2x 1 m 2x4 (front & back)
-- 2x 52,4 cm 2x4 (sides)
- Legs
-- 2x 63,1 cm 2x4 (front)
-- 2x 90 cm 2x4 (back)
- Armrest base:
-- 2x 60 cm 2x4 (2x4 cutout for back leg)
- Armrest top:
-- 2x 60 cm x 20 cm 2x4 (2x4 cutout for back leg)
- Cushion stop back:
-- 1x 1,076 m ~1x4 (top)
-- 1x ~1 m ~1x4 (bottom)

Seat top height from the bottom: 40 cm

History:
My partner wanted a small couch with a harder seat cushion than most commercially available ones. She created a rough 3D model of what she imagined, but that would have taken much more material than necessary. I created the much more reduced version you see here. The build took ~3 days for a beginner like me, when using screws (60x4 T20 Spax). Aside from the leg unevenness from cutting errors, the