Yard operations

[NW Modeling List]

Mark,
 
    This won't answer any of your questions but is a  comment on your 
proposed layout design. 
 
An around the room layout with widths of three and four feet will make  
construction and operation difficult unless you have extremely long arms (it  will 
be five feet from the aisle to the room corners) or have one of those  rolling 
lean over ladders.  
 
No scale was indicated.  However, in any scale up through "O" twice  around 
with double track can be done with much less width.  
 
A three or four foot duck-under will be brutal.
 
You may want to consider thinning the widths and adding a peninsula in the  
middle for a longer mainline run.  
 
You can widen areas for your yard while narrowing others to maintain aisle  
width.
 
Bob Lang
(Layout builder in San Diego)



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