Joe

Oh and don't let kids play with a footballs near them 😭. These were the early ones I wasn't happy with anyway. Got hold of some angle iron, and steel lbits and bobs, going to build a suspension bridge of some sort for this section.

I got hold of a Punkt cutter for £10 on eBay, started to wear after 30 or so cuts. You'll know when it starts snagging and your wrists hurt. Not sure if wet cutting helps, but the blocks are like sponges, when they get wet they stay wet. Ended up with 50 arches, making them rise at a 4/100 gradient while keeping the arches lined up is best avoided, my brain hurts. The left hand side of the viaduct I gave up through boredom and layed a concrete base on a 4/100 slope into the gazebo instead, then mastic'd them into place on top. Seem solid enough. I got sheets of OSB, cut loads of 8ft long 4" wide straights. Got the tape and string out to measure 60" radius curves for my tracksetta gauge. It was then simply a case of felting them and screwing them all down. Tracks going down over the weekend, then need to work out how to waterproof the point motors on a passing loop. Eventually I'm going to put a Wye junction in to get into the back of the garage, probably next year now.

For anyone in the future building these viaducts. I built half a dozen or so with the saw and rasp method. Then I came across 127mm diamond hole cutters. Gives a perfect arch when you clamp all the blocks together. Unfortunately the best method for cutting the support was a diamond tipped bandsaw blade. I was quoted £150 for that so I bought 2 block saws instead 😂.