For Archicad 19: Eptar Reinforcement

ArchiCAD 19 was a great BIM vessel, but Eptar was the engine that made reinforced concrete honest . It turned the shell tool from a shape-maker into a structural collaborator. And on that museum project, not a single rebar was cut twice.

ArchiCAD 19 groaned. The progress bar stalled at 67% for ten seconds. I thought it crashed.

“Eptar isn’t just a plugin,” he said, sliding a USB stick across the table. “For AC19, it’s a philosophy. It doesn’t just draw rebar. It breathes with the geometry.” eptar reinforcement for archicad 19

Then, the arch lit up.

Not a chaotic mess of red lines, but a perfect, adaptive lattice. The bottom rebar followed the tension curve like muscle fibers. The top rebar compressed along the arch’s spine. Where the twist happened, Eptar automatically inserted double-density stirrups—something I would have taken three days to model by hand. ArchiCAD 19 was a great BIM vessel, but

That’s when an old mentor whispered a name: .

In vanilla AC19, that meant deleting the shell, rebuilding it, and crying over lost rebar. With Eptar? I simply dragged the shell’s node. The geometry updated, and Eptar’s “Smart Heal” engine kicked in. Within 12 seconds, the reinforcement recalculated—the stirrups rotated, the longitudinal bars shortened on one side, lengthened on the other. The cover remained intact. ArchiCAD 19 groaned

I installed Eptar 2.7 (the last version stable for AC19) on a Friday night. The interface was spartan—no fancy icons, just a palette with four buttons: Trace, Parameterize, Align, Export. But the magic was in the “Reinforcement by Rules.”