Big outdoor structures are rarely cut and paste — that’s why our Modular Ballast Unit is built to adapt. From outdoor roofs to line array towers, it gives you the flexibility, footprint, and weight needed for real-world rigging.
Designed to support large, heavy, and awkward truss structures, this unit’s modular layout allows you to:
Mount 12", 16", or 20.5" truss directly to all five sides
Stack units vertically or horizontally to increase footprint and weight
Offset and Diamond mount 12" truss
Bolt in arbor or XL weights to increase mass
Attach screw jacks, leveling feet, casters, or ground stakes via the corner provisions
Specs & Weight Capacity
Empty weight: 267 lb
With 6” arbor weights: 654lb
With XL weights: 875 lb
Forklift access: Pass-through fork slots for easy transport
Side knockouts: Allow direct connection of half couplers, cheeseboroughs, or slings
Bolt patterns: Top and bottom holes align for stacking or bolting multiple units together
Mounting Options
Top plate: Supports square truss (12" to 20.5") or 1.5" pipe, mounted centrally
Edge mounting: 12" truss can be mounted offset, in all 4 corners, or bridging units.
Diamond orientation: Supports central or offset mounting patterns
Stacked mode: Mount 16" or 20.5" truss to the sides when using two units together
Below are videos and animations showing this unit in action — including stacking methods, weight installation, and connection techniques.
Actual product design may vary from drawings due to Ent Fab constantly trying to improve its products, if you have a specific need or question feel free to call or email us.
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