Early builds occasionally had issues with rebar patterns for complex geometries, such as rectangular footings or continuous beams. These were typically resolved in versions like v1.5.0 and v1.5.2 .
An old home’s charm comes with hidden steel skeletons. A TOH rebar crack is not a minor blemish—it is a warning siren. The rust behind that crack is a slow-moving demolition crew. Fortunately, with proper diagnosis (hammer, covermeter, rust test) and a professional repair regimen (expose, clean, inhibit, patch, protect), you can stabilize the structure for another 50 years. toh rebar crack
Below is a draft "paper" summarizing the key aspects of this phenomenon. Early builds occasionally had issues with rebar patterns