I have used Mtracks for #15 turnouts for several years as well as their curve pieces but in working on the Chattanooga line at Cowan, TN I came across controlled ladders at both ends of two controlled sidings which parallel the two main tracks on the right side, southbound. It turned out to be rather easy once I worked out the sizes of straight pieces required etc. and so I am going to explain step by step with illustrations. This applies to the south end which has a left hand turnout off the #2 main track, followed by a !5 right turnout. The only oddity really is that for proper spacing, I used a left-hand closure piece with a right-hand frog for the 2nd turnout. There are probably many ways of doing this other than how I did it.
First we have 4 equally spaced tracks (M4 track) at the left and we are going to build turnouts to the right. The lower pair are the controlled sidings, top track is #1 main, then #2 main.
NO15_LDR_1.jpg
Now we start by adding the left-hand closure piece. At this point, I could have used the left-hand closure for Kuju track spacing if my 2 sidings were spaced apart that way.
NO15_LDR_2.jpg
Next we will add the right-hand frog and points pieces to the right end. As these are controlled sidings, I will use the controlled points, otherwise manual points would be okay. I will also add 9 meters of straight track to the points at the right.
NO15_LDR_3.jpg
Next we will add a #15 left frog after the 9 meters of straight track. This will allow the #2 main track and #1 controlled siding to have the proper spacing apart.
NO15_LDR_4.jpg
And now we will add the #15 left points and whatever M2 track is needed at the right. I have put a 10 meter piece there temporarily.
NO15_LDR_5.jpg
This has completed the turnouts but now we have a long double track and a short single track gap. Fill the long gap with a 100 & 10 meter M2Track piece and then use 1 meter & 3 meter single track pieces to close the remaining space. I first determine how much track is needed by using dynamic as a measuring tool.
NO15_LDR_6.jpg
Now close the short single track gap with a 50 meter & 5 meter piece. This will complete the #15 ladder.
NO15_LDR_7.jpg
Jerry
First we have 4 equally spaced tracks (M4 track) at the left and we are going to build turnouts to the right. The lower pair are the controlled sidings, top track is #1 main, then #2 main.
NO15_LDR_1.jpg
Now we start by adding the left-hand closure piece. At this point, I could have used the left-hand closure for Kuju track spacing if my 2 sidings were spaced apart that way.
NO15_LDR_2.jpg
Next we will add the right-hand frog and points pieces to the right end. As these are controlled sidings, I will use the controlled points, otherwise manual points would be okay. I will also add 9 meters of straight track to the points at the right.
NO15_LDR_3.jpg
Next we will add a #15 left frog after the 9 meters of straight track. This will allow the #2 main track and #1 controlled siding to have the proper spacing apart.
NO15_LDR_4.jpg
And now we will add the #15 left points and whatever M2 track is needed at the right. I have put a 10 meter piece there temporarily.
NO15_LDR_5.jpg
This has completed the turnouts but now we have a long double track and a short single track gap. Fill the long gap with a 100 & 10 meter M2Track piece and then use 1 meter & 3 meter single track pieces to close the remaining space. I first determine how much track is needed by using dynamic as a measuring tool.
NO15_LDR_6.jpg
Now close the short single track gap with a 50 meter & 5 meter piece. This will complete the #15 ladder.
NO15_LDR_7.jpg
Jerry