Depth 2-3/8″ Width 3-7/8″ max Height 4-1/4″ Clearances (W) 2-3/16″max (H) 3-3/16″
This design was used for tunnels that had problems with falling rocks. It can be made with or without the front braces, and adds a superb touch to any layout. All materials are strip basswood and include Nut/Bolt/Washer castings. Full-size templates are enclosed for various clearances: 16′ wide for standard NMRA Specs and 14′ for Narrow Gauge layouts. The ‘S’ scale model’s clearance is excellent for On30.
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