late summer completion of bridges 1 and 2 on the Cherry Hill

stevedenver

stevedenver

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after unseasonal and unusually heavy rains and much erosion, two new bridges needed to be built to span Arroya de Dos Hermanos. The superintendent took some photos for the benefit of the Board.

Here they are:
Culvert bridge 1 upon completion
bridges1and2construction2011001.jpg
 
and king post bridge #2 with a work truck 12 to adjust some rail alignment
bridges1and2construction2011008.jpg
 
Excellent work and a neat idea
 
bridge 1 as seen from the pergola at
St Agnes-on-Her-Back-in-the-Field, in the little southwestern Colorado town of No Agua
bridges1and2construction2011012.jpg
 
Great photos, Steve - looks like you've placed the bridges where you'll get some run-off - excellent idea.
 
Are they strong enough are they reinforced underneath? I made a similar (not as nice) basic bridge and it bends when my loco goes over it.
Gonna add a trestle.

As said nice work.
 
Nice work do like the "A" frame bridge :thumbup:
 
Cyclone said:
Are they strong enough are they reinforced underneath? I made a similar (not as nice) basic bridge and it bends when my loco goes over it.
Gonna add a trestle.

As said nice work.
Click to expand...

strong enough that i can stand on them-
they are redwood -to resist rot and moisture-strong but light
there are four 1x1 stringers on each side of the rail underneath (as well as the footboards you can see on top)
every joint or connection glued with outdoor glue and nailed too -stringers underneath are glued and screwed-with shorty but wide flanged screws for good deep purchase
the stringers rest on the abutments-there is a recessed edge as well as the uprights on the abutment face itself --very strong especially given the short span

however....the footbridge the coolie is using -thats another story entirely-built that for my son years ago in about twenty minutes-(to avoid buying a $50+ one he saw at the train shop-not much different-while the risers have blocks on the angle runner to supprt and strengthen-its really rather delicate, but not flimsy-its basswood as i recall-perhap poplar but i think basswood-stained and sealed
 
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