09-04-2019, 09:14 AM
Building with Molding/Casting Products
![[Image: 800px-Thomas-viaduct-2011.jpg]](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Thomas-viaduct-2011.jpg/800px-Thomas-viaduct-2011.jpg)
If I were to build with molding/casting type products, I think I could do it with 3 molds?
1) Mold #1. The curved interior arch roof surface. Question would be if this could be a pre-curved mold, or if it needs to be filled with plaster/hydrocal while in a flat stage, then bent into curved shape prior to total hardening??
2) Mold #2. For each identical arch section, 6" wide from c to c of arch columns, the flat surfaces of the faces, including those 'lip' of stones that rim the arch opening.
3) Mold #3. A separate mold for those vertical columns that would glue on over the joints in the multiple arch moldings.
If I were to build with molding/casting type products, I think I could do it with 3 molds?
1) Mold #1. The curved interior arch roof surface. Question would be if this could be a pre-curved mold, or if it needs to be filled with plaster/hydrocal while in a flat stage, then bent into curved shape prior to total hardening??
2) Mold #2. For each identical arch section, 6" wide from c to c of arch columns, the flat surfaces of the faces, including those 'lip' of stones that rim the arch opening.
3) Mold #3. A separate mold for those vertical columns that would glue on over the joints in the multiple arch moldings.