by Tothe, published
This is a set of pieces to build your own modular bridge or overpass. Ideal for war games or your kids' Matchbox cars. Pier height should be good for 3 stacked layers of 1-1/2" foam insulation if that's your terrain construction material of choice.
Works well with my Jersey Barriers: http://www.thingiverse.com/thing:55070
April 10, 2013: All old files have been updated and replaced. New files for complete set added.
April 27, 2013: Slight changes to short beam & road end for better end-piece-only short bridge option. Added 3-column pier support as an alternative option. Removed "Work in progress" tag, but I'll probably keep adding new bits from time to time.
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Print two long beams for each center road section. Print two short beams and one abutment for each end section. Print one pier for each joint between road sections. For a very short bridge, you could use two end sections, two long beams, and two abutments.
The road section is drawn at 180mm x 180mm. If your print bed is smaller, scale all parts accordingly. 67% should still work well for Matchbox cars, Hot Wheels, etc. while still using two stacked layers of foam insulation to carve terrain.