Before installing, prepare SketchUp to accept the legacy V120 code.
.rbz fails):
If you are a structural detailer or a civil engineer using SketchUp, you’ve likely heard of TOH Rebars. This legendary free extension (Version V120) is a lifesaver for quickly generating 3D reinforcement bars. However, getting it to actually run on modern systems can feel like solving a puzzle.
Many users report that the original download links are dead, the toolbars are greyed out, or the extension simply crashes SketchUp upon launch. toh rebars v120 extension for sketchup download fix
After spending hours digging through old forum threads and testing on Windows 11, here is the definitive fix to get TOH Rebars V120 working on SketchUp 2017–2023.
The most famous bug: when you draw a beam and click "Generate Rebar," SketchUp freezes. This is because of an infinite loop in toh_rebars_geometry.rb. Before installing, prepare SketchUp to accept the legacy
Solution:
Open toh_rebars_geometry.rb and find line 187 (approx). Change:
# Old broken code
while true
# ... rebar placement logic
end
To:
# Patched code with escape for loop
max_iterations = 500
iteration = 0
while iteration < max_iterations
# ... same logic
iteration += 1
end
Save the file and reload the extension via Extensions → TOH Rebars → Reload.
For structural engineers and architects using SketchUp, rebar detailing is often a missing link in the workflow. Toh Rebars has historically been one of the most popular plugins to bridge this gap, offering automated placement, scheduling, and 2D drawing generation. Manual install (if
However, users attempting to download or run Version 120 (V120) often encounter broken links, login walls, or installation errors. This write-up covers the current situation regarding the "download fix" and how to ensure the extension works with modern SketchUp versions.