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DM&E - Crown Avenue Bridge

Photos 

DM&E Crown Avenue Bridge

Overview

Photo taken by John Marvig in April 2018

Enlarge

BH Photo #425457

Map 

Facts 

Overview
Steel stringer bridge over Crown Avenue on Dakota, Minnesota & Eastern Railroad
Location
Redwood County, Minnesota
Status
Open to traffic
History
Built 1915
Railroads
- Canadian Pacific Railway (CP)
- Chicago & North Western Railway (CNW)
- Dakota, Minnesota, & Eastern Railroad (DME)
Design
Steel stringer
Dimensions
Length of largest span: 32.0 ft.
Total length: 80.0 ft.
Also called
C&NW Bridge #556.5
Approximate latitude, longitude
+44.22485, -95.49275   (decimal degrees)
44°13'29" N, 95°29'34" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/300900/4899869 (zone/easting/northing)
Inventory number
BH 81407 (Bridgehunter.com ID)

Update Log 

  • April 29, 2018: Added by John Marvig

Sources 

Comments 

DM&E - Crown Avenue Bridge
Posted May 1, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

The more miles I log, the more oddities like this I seem to find. The railroad had their standardized designs, and probably just called it whatever the chief engineer felt like calling it. I will relist this bridge as a stringer, as that seems to be the agreed upon how it functions.

DM&E - Crown Avenue Bridge
Posted May 1, 2018, by Matt Lohry

Looking at Photo 8, it's not clear whether there are perpendicular diaphragms between the two middle stringers...if there are not, this could almost be classified as two narrow side-by-side deck plate girder bridges. Either way, when they're spaced evenly like this, they basically act like stringers.

DM&E - Crown Avenue Bridge
Posted May 1, 2018, by Nathan Holth (webmaster [at] historicbridges [dot] org)

It is a stringer (aka multi-beam bridge) composed of built-up beams. The steel you see perpendicular in between beams are diaphragms. Its possible the railroad loosely classified these as plate girders, but using modern terminology it is a multi-beam bridge.

DM&E - Crown Avenue Bridge
Posted April 29, 2018, by John Marvig (marvigj27 [at] gmail [dot] com)

I was wondering about it. A track chart and a bridge report called this a deck girder, so I assumed that was the proper design.

DM&E - Crown Avenue Bridge
Posted April 29, 2018, by Clark Vance (cvance [at] dogmail [dot] com)

Looking at photo 8 I'd classify it as a steel stringer. The I-beams appear to be assembled like a plate girder but to me girder suggests two parallel main components with load being transferred to them by beams running perpendicular to the girders.

I'm not used to seeing shallow built-up I-beams like these.