Ease of assembly: As previously stated, Hevi-Rail can be assembled as a support structure, and therefore set up as a single unit. A secondary advantage of the single unit is that once the structure is assembled, it can then be machined as a whole, facilitating high-precision alignment between the supports. In addition, Hevi-Rail uses a simple process of clamps or weldments between the joints.
With profile rail, alignment is much harder to achieve. In fact, many extra steps are required, including machined surfaces for rail mounting, high-cost drilled and tapped holes, and repeated fine-tuning and testing. These steps add up to a much higher tally in man-hours, and significant bottom line costs.
Environment: While Redi Rail and IVT have wipers and/or wheel covers to assist in dirty conditions, Hevi-Rail is capable of withstanding many contaminated environments such as garbage trucks, blueberry pickers, and outdoor scissor lifts. Their rollers have a sealed bearing design and are partially protected by the rails.
In contrast, profile rail has limitations in dirty environments. This is because the ball bearings are exposed to particulates that can cause premature wear and eventual catastrophic failure.