Revit 2019 Extension
Hi @info,
Revit structure extension has been taken over by a company called symetri. They will release the new revit extension for structure in coming moths for Revit 2019. You can check this link for further information.
https://www.naviate.com/product/naviate-rebar-extension/p-659
Symetri will deliver the reinforcement extension capabilities within Revit® Extensions for Autodesk® Revit® 2019 as part of our Naviate Rebar Extension. We will make it available at no cost to customers using Revit® 2019 and will be released in coming months. We are excited to have this agreement with Autodesk to extend Revit for reinforcement detailing in a larger way for Autodesk customers. We will continue to enhance its capabilities and deliver even more productive features, for the rebar extension users in the future. Please stay tuned for the 2019 version of Naviate Rebar Extension.
It is not available yet 
@shefypattambi wrote:Hi @info,
Revit structure extension has been taken over by a company called symetri. They will release the new revit extension for structure in coming moths for Revit 2019. You can check this link for further information.
https://www.naviate.com/product/naviate-rebar-extension/p-659
Symetri will deliver the reinforcement extension capabilities within Revit® Extensions for Autodesk® Revit® 2019 as part of our Naviate Rebar Extension. We will make it available at no cost to customers using Revit® 2019 and will be released in coming months. We are excited to have this agreement with Autodesk to extend Revit for reinforcement detailing in a larger way for Autodesk customers. We will continue to enhance its capabilities and deliver even more productive features, for the rebar extension users in the future. Please stay tuned for the 2019 version of Naviate Rebar Extension.