Originally posted by dcs221
Where did you see that? Seems like a lot of added weight.
Used to work at Silverwood in management for 4 years; I was at the job site when RMC was first installing the original prototype topper track onto Tremors, as well as when they returned to add more to other sections (eventually all of Tremors will have the Topper Track, it's just being installed in phases). They pump in the concrete via valves w/end caps that are placed so far apart to space it out. After the concrete (aka "non-shrink design mix") is pumped in, the valves are sealed and welded shut.