Sanborn Covered Bridge Renovation
WGN 45-10-02
By Joe Nelson
The Stabilization as of 09/07/2013
To build the "island" upon which the hydraulic jacks could be set to lift the bridge into place for repairs, 20 cubic yards of stone was delivered. Two-thirds to three-quarters of this pile was was used, carried to the river by hand in buckets.
Photo by Joe Nelson
Photo by Joe Nelson
A view of the broken chord.
Photo by Joe Nelson
Photo by Joe Nelson
View of the cribbing from the Route 5 side of the bridge.
Photo by Joe Nelson
Photo by Joe Nelson
View of bridge interior: the upstream truss and the back of the real estate office.
Photo by Joe Nelson
Photo by Joe Nelson
Two 25 Ton hydraulic jacks were set atop a cribbing built on the "island" exerting 35 to 38 tons of lift, raised the bridge approximately 25 inches to the horizontal.
Photo by Joe Nelson
Photo by Joe Nelson
The downstream truss viewed from the motel end of the bridge.
Photo by Joe Nelson
Photo by Joe Nelson
View of the bridge interior: The down stream truss after jacking. The broken section of the upper chord is above the panel just beyond the missing board in the siding.
Photo by Joe Nelson
Photo by Joe Nelson
Note bolster beams. See also the break in the Abutment cap, motel end of bridge.
Photo by Joe Nelson
Photo by Joe Nelson
Editor's note: This item was originally posted on September 13, 2013.
