ProtaStructure Suite Enterprise 2018 SP4 ProtaStructure Suite Enterprise 2018 SP4 | 533 MB Prota Inc. has released an update to ProtaStructure 2018. The 2018 release includes our fantastic ProtaSteel for steel connection design and detailing, Hundreds of new features and enhancements in ProtaStructure and ProtaDetails for rapidly designing and documenting your building projects, and our …