Aaron Brooks Wolters
Brigadier General
Nice shots Glenn, and I have a library full of Calvin Hobbs. 
T Bolts Pics
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Airframes
Benevolens Magister
Is that bridge painted in RLM66 or RLM75 Glenn ?
- Thread starter
- #83
T Bolt
Colonel
It's a 2 part epoxy zinc primer that I think is pretty close to RAF interior color.
Vic Balshaw
Major General
Nice pics mate, so what's it crossing a rail track.
evangilder
"Shooter"
Neat stuff, Glenn. I'm always amazed how fast the bridges go up.
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- #86
T Bolt
Colonel
Huh?
Vic Balshaw
Major General
Okay Glenn, I know I'm a bit dumb and certainly not an engineer but what is it you are bridging as I can see some support brickwork either side!
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- #88
T Bolt
Colonel
I get you now Vic, I just didn't understand the way you phrased the question.
That rail line runs through the north side of Chicago on an elevated embankment and a city street crosses under it about every quarter mile, one busy street alternating with one side street. This is one of the side streets. They were built in the 1890s and in need of replacement.
The old bridge was built on abutments made of large limestone blocks set on a 5' thick concrete footing. The new bridge is sitting on concrete abutments which were made with brick texture form liners to give them the look of stone block similar to the old bridge. Instead of just sitting on a footing, these abutments are on 75' deep caissons that go all the way down to bedrock. If the old bridge lasted over 100 years, the new one should double that.
That rail line runs through the north side of Chicago on an elevated embankment and a city street crosses under it about every quarter mile, one busy street alternating with one side street. This is one of the side streets. They were built in the 1890s and in need of replacement.
The old bridge was built on abutments made of large limestone blocks set on a 5' thick concrete footing. The new bridge is sitting on concrete abutments which were made with brick texture form liners to give them the look of stone block similar to the old bridge. Instead of just sitting on a footing, these abutments are on 75' deep caissons that go all the way down to bedrock. If the old bridge lasted over 100 years, the new one should double that.
Crimea_River
Marshal
Interesting stuff Glenn. My first job after finishing school was to work in the engineering deptartment of a large steel fabricator. I saw quite a few of those bridges go through our shop for the CNR and CP Rail. Brings back memories.
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- #90
T Bolt
Colonel
I did a big one for the CN a few years back. Three track, three-100 foot spans and about a million bolts to test. I got real tired of lugging around that 6' long torque wrench.
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Vic Balshaw
Major General
Thanks a bunch Glenn and I would guess from what you have said this bridges lifespan is likely to be much more than double the old one.
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- #92
T Bolt
Colonel
I took the family and our bicycles out to the Morton Arboretum in Lisle IL a couple of weeks ago. It was a cold overcast day but I still managed to get some nice pictures, even some deer, and the sun peaked out a little at the end.
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A4K
Colonel
Nice pics Glenn! Looks like a nice place to walk round in.
fubar57
General
Great shots Glenn. What kinda deer you grow in Illinois? Look like Whitetail.
Geo
Geo
Aaron Brooks Wolters
Brigadier General
Nice shots Glenn. I need to take a walk in the woods around here.
vikingBerserker
Lieutenant General
Well done!
Crimea_River
Marshal
Nice pics of a beautiful place.
Good shots Glenn!
ontos
Tech Sergeant
Great shots Glenn, the first bridge shot is my favorite. Nice quite place to walk and relax.
Vic Balshaw
Major General
Lovely pictures Glenn, a hint of spring in the air and looks like a nice place for a quiet day of meditation, also like that first bridge.
