antique riveted or bolted iron beam bridge/structure building kit

sriesch

A construction kit with various riveted or bolted iron beams, sections, and assemblies that can be arranged into a myriad of desired configurations.  Think impressive bridges, structures like the Eifel tower, building frames, railway structures, blimp towers, etc.  something akin to the "Modular Bailey Bridge Construction Kit" ( https://www.daz3d.com/modular-bailey-bridge-construction-kit ), but with a more antique and massive feel, some curved section options, and perhaps including some prebuilt groups of beams (like a bridge section, or a support section, or a crossbrace section) to save time and effort. 

Personally I'm looking for 3DL materials, but as long as I'm able to easily convert or retexture them an iray version would be fine.

If you wanted to get elaborate, one could include an extra set of matching decorative add-on bits as are sometimes found on bridges and buildings to make it victorian or steampunk or gothic or retro-scifi or modern or all of the above or whatever or sells best or catches your interest.

Bendinggrass

That would be a great idea.