Model railroad, simple bridge

thingiverse

This model steel bridge, designed for model railroads, features three different versions for O/S, HO, and N/Z scales. Inspired by various images online, the design isn't based on a specific prototype. Dimensions vary per scale, with O measuring 60x90x200mm, HO at 36x54x150mm, and N (also for Z) at 21x31.5x100mm. The i-beams are scaled to fit each model's dimensions. Users can further scale the models as needed. Printing requires good adhesion to the build plate and careful use of a heat gun for warped bridges. A Makerbot Replicator2 with PLA filament is recommended, and users should optimize print parameters for their specific printer and filament. Tips include using quality filament, maintaining a clean build plate, and pre-feeding filament before printing. Complicated parts should be printed separately, and faster printing speeds are suggested to prevent balling filament. Maintenance of the printer is also crucial for successful prints. The program is licensed under the GNU General Public License, and user feedback is appreciated.