Continuing my Concrete arch bridge

After the second pour was cast and fully cured, I started to detail and assemble the bridge.

Adding stone seam lines stage 1

Then enlarging the grooves with a file, and then a steel rod of the right diameter.

Filing the stone lines

Steel rod in the 3rd stage of scribing the stone lines

I also filed bevels on the vertical edges of the small arches

Filing relief angle on small arches

I then painted the inside walls of the bridge with aged concrete

Testing assembled bridge ( no exterior paint or weathering)

In a future post I’ll talk about painting, weathering and installing the bridge in the layout

Completing my cast hydrocal Cement arch bridge

Back, finally,  to casting the second side of my arch bridge, so to bring things up to date, here are a few shots of the mold and initial pour.

Wood & Sintra mold with steel wire re-enforcing rods

Starting pour

Pouring Hydrocal in a hurry – sets quick

and leveling off

Leveling Hydrocal

Then back to the present starting the second pour

original cast and second pour

Both casts with spacer cut from 3/4 inch Sintra (expanded closed cell PVC sheet)

I’ll continue detailing and assembly in the next post

 

Continue working on the Yard & Engine Servicing area

Some Photos showing progress, and also trying arrangements of structures for the engine servicing facility, and how these would photograph in different light (time of day-or weather)

Working with laying track and stone wall at one yard lead

Track down and stone wall further along with concrete cap.

Trying position of servicing structures

Working it out.

Trying angles

Camera and lighting set up after placing structures and ballast, greenery etc.

Final early morning light Photo.

Early morning happening-Click to enlarge

 

Pretty interesting article in the New York Times about a new Model railroad Museum to be designed by Architect Frank Gehry

The Extreme Model Railroad and Contemporary Architecture museum in North Adams Mass. 83,000 square feet with 40 foot ceilings to accommodate 35 foot tall Empire State Building.

The article can be accessed here  Extreme Model Railroad and Architecture Museum

 

COOL

 

Back working on the layout

Back after a summer of visiting various railroad venues, and getting down to finishing trackwork. I am modifying Shinohara code 70 # 8 switches, to work on DCC.

I am using Micro engineering Code 70 flextrack and # 6 switches, but need some # 8s and also some # 4s on the logging branch, which ME does not offer. On the Shinoharas, I am changing to gapped PC board throw rods and  connecting the running rails and closure rails with wire jumpers soldered to the bottom of the rails.

Modified Shinohara #8 code 70 switch

Also cutting gaps in the rail on either side of the frog, filling the gaps with CA glued plastic, formed to fit, and soldering a wire to the frog rails underneath to connect to a Tortoise switch machine contacts as the switch is thrown to guard against shorting.

Switch frog modified