Welded bookshelf from square tubing

Finished product

The shelf as it stands now.

Cutting the steel pieces

I cut the square tubing using angle grinder and cleaned off the mill scale from the ends, where it’s going to be welded, using flap disc.

Welding the pieces together

I held the pieces together while welding using magnets.

Welding square tubing.

Both sides welded.

Drilling holes for the rivnuts.

Rivnuts.

Inserting rivnuts with a special rivnut tool.

I decided to add one cross piece at the bottom of the shelf, to meke it more sturdy.

Finished!