Credit _ Readme _ Bridges 070425

Triple-A01: This was my first go at a bridge made out of LEGO. The pillar was originally a study of making trusses out of LEGO while changing the angles of the trusses. (http://www.brickshelf.com/cgi-bin/gallery.cgi?f=46714 and http://www.brickshelf.com/cgi-bin/gallery.cgi?f=60703 )But once I figured out I could put 2 RR tracks between the split pillars I went for it. (No longer living)

Triple-track-bridge2: So this is what came out of the Angled truss studies. This was at a COLTC display at a COSI in Toledo if I remember right. The cable stay bridge was 5ft long with a single mono-rail line beneath the dual RR tracks. The dam and water scene is from Paul Janssen (http://www.brickshelf.com/cgi-bin/gallery.cgi?m=brickbuy ). (No longer living)

Triple-Version-4: This was an extended version of previous bridge. The length is now 10ft long and was shown at several COLTC shows. I did have to make support cables from a wire due that I never purchased the amount of liftarms needed on the 10ft version. (No longer living)

Arch-V5: Was built fro the Lady of the shrine display with COLTC. This was also my first attempt at an arch style bridge. Once bases were attached to BP’s and connected together the bridge became very sturdy. I later made a dual version of the bridge that was shown in NMRA 2005 with 3 RR tracks on bridge. (No longer living)

Cablele-Stayed-Draw-V6: This was probably my biggest problematic bridge to date. I just tried to push to many envelopes. First I wanted it to be 15ft, and able to raise so COLTC members would not need to craw under the tables. I was unable to make custom tracks that could be easily disconnected in time for show. So even though I could raise the bridge on the Pivot, COLTC members did not get this benefit during show.  Also with the extreme length of the bridge would create a bouncing effect when trains went over. I fixed this by connecting ropes to pull down the bottom, kind of like the main cables but reverse. This kept the bridge flat with or with out trains on it, original I made a channel in the bridge for strips of metal to weigh down the bridge. This would give the bridge the needed weight to be under true tension, since LEGO weighs so little. (No longer living)

PrestressedConcrete7: Well this came from another day of studying cheap 1x2 bricks. While makes shapes with mild stress they can create sturdy sound tubes. And they are amazing on the ability to support weight while only having 1x2 bricks. While load testing these designs I noticed that they did not bend at all until they broke. And these books are not little books.  (No longer living)

PrestressedConcrete8: Second of my Pre-stressed studies. This one was used in my NMRA 2005 display. This bridge was almost 99 % 1x2 bricks and a few choice locations of 1x8 and 1x16 bricks for the road surface. (No longer living)

Bridge-V9: Was a bridge I wanted to look like it was a pre-stressed concrete but not built the same as my others. I also inserted my Custom road designs into this bridge.  This was show a the OHIO State Fair 2005  (No longer living)

Bridge-10: This was my second attempt to make a bridge that will raise up so COLTC members could pass. I still have not made my modified RR track for easy lifting. But this does work once RR track is unhooked. (Still living)

Train-bridge-V13:  This is for a future layout yet to be displayed. (Still living)

Train-Bridge-V14: This is for a future layout yet to be displayed. (Still living)

Bridge-15: This is for a future layout yet to be displayed. (Not yet built)

Mike Gallagher
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Copyright Mike Gallagher
All work is original designs by Mike Gallagher unless mentioned.