Riddle Bridge, Spanning Gasconada River, Dixon vicinity, Pulaski County, MO

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Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey

17 b&w photos
15 data pages
1 photo caption pages

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TITLE:
Riddle Bridge, Spanning Gasconada River, Dixon vicinity, Pulaski County, MO

CALL NUMBER:
HAER MO,85-DIXON.V,1-

REPRODUCTION NUMBER:
[See Call Number]

MEDIUM:
Photo(s): 17 (4 x 5 in.)
Data Page(s): 14 plus cover page
Photo Caption Page(s): 1

DATE:
Documentation compiled after 1968.

CREATOR:
Historic American Engineering Record, creator

NOTE:
Survey number HAER MO-28

Building/structure dates: 1913 initial construction

Significance: Riddle Bridge is a Pennsylvania (Petit) span with timber stringer approach spans on each end. The metal truss is unique within Missouri because each alternate laced vertical member (numbers 3, 5, 7, and 9) extends only half the distance from the upper chord to the lower chord. A single eyebar is pinned to the end of the half-length laced member; this eyebar continues to a panel point connection at the lower chord. Riddle Bridge was fabricated by the Canton Bridge Company of Canton, Ohio.

SUBJECTS:
MISSOURI--Pulaski County--Dixon vicinity
agriculture
civil engineering
bridge construction

COLLECTION:
Historic American Engineering Record (Library of Congress)

REPOSITORY:
Library of Congress, Prints and Photograph Division, Washington, D.C. 20540 USA

DIGID:
http://hdl.loc.gov/loc.pnp/hhh.mo1068

CONTENTS:
Photograph caption(s):
1. VIEW TO EAST
2. WEST APPROACH SPAN, VIEW TO SOUTHEAST
3. VIEW TO SOUTHWEST
4. VIEW WEST-SOUTHWEST OF RIDDLE BRIDGE FROM BLUFF TO EAST
5. VIEW TO WEST
6. VIEW TO WEST FROM EAST PORTAL
7. EAST APPROACH SPAN, VIEW TO NORTHWEST
8. VIEW TO NORTH
9. DISTANT VIEW TO NORTH
10. DECK SUPPORT SYSTEM, VIEW EAST
11. WESTERN PIER SUPPORTING TRUSS, VIEW NORTH
12. BEARING, SOUTHWEST CORNER OF TRUSS
13. EXPANSION BEARING, NORTHEAST CORNER OF TRUSS
14. PORTAL CONNECTION, SOUTHEAST CORNER
15. MID-PANEL POINT CONNECTION, NORTH SIDE BETWEEN THIRD AND FOURTH PANELS FROM WEST END OF TRUSS. NOTE NUMBERS STAMPED IN MEMBERS.
16. LOWER CHORD PANEL POINT CONNECTION, NORTH SIDE, THIRD VERTICAL MEMBER FROM WEST END OF TRUSS
17. GUARD CABLE AND LOWER CHORD PANEL POINT CONNECTION, NORTH SIDE, THIRD VERTICAL MEMBER FROM WEST END OF TRUSS

CONTROL #:
MO1068

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