Lightweight, Safe and Easy
Prime Design has been the industry’s ergonomic leader since 1992, when we first introduced the concept of an ergonomic ladder rack.
Our design philosophy starts with the worker – how can we make the job safer, easier and more comfortable for the human body? That is because we firmly believe that a product’s design and how it impacts the user is every bit as important as the quality of materials and construction.
The ErgoRack was designed to reduce muscle stress, eliminate risk of injury and speed the job of loading and unloading ladders from a work van.
Easy to use
Deploys with only 2 fingers
Reduce Injuries
Eliminates slip and fall hazards from climbing on bumper or tire
Improve Productivity
Deploy or stow in less than 20 seconds
Safe Operation
Feet stay safely on the ground.
Reduce Back Strain
Reduce back and muscle strain from improper loading.
Smooth Operation
Hydraulic cylinder provides smoothest, controlled descent of any rack in the industry.
Easy Access
Removable handle – easy access for operators of any height.
Maintenance
Maintain vehicle warranty and resale value with no holes to drill.
Ergonomic
Winner of ergonomic awards in USA, France, Germany, and Australia.
ErgoRack Models – RAM ProMaster 
| Model | Vehicle Wheelbase | Vehicle Height | Streetside Feature | Curbside Feature | Weight | Documents |
| HBB-PM | 118 IN, 136 IN,159 IN, or 159 IN Ext. | 90 IN (Low) or 101 IN (High) | End Stop | End Stop | 45 lbs | Overview Assembly |
| HBR-E-PM | 118 IN, 136 IN,159 IN, or 159 IN Ext. | 90 IN (Low) or 101 IN (High) | End Stop | Rotation | 100 lbs | Overview Assembly |
| HRB-E-PM | 118 IN, 136 IN,159 IN, or 159 IN Ext. | 90 IN (Low) or 101 IN (High) | Rotation | End Stop | 100 lbs | Overview Assembly |
| HRR-E-PM | 118 IN, 136 IN,159 IN, or 159 IN Ext. | 90 IN (Low) or 101 IN (High) | Rotation | Rotation | 155 lbs | Overview Assembly |
| HRR3-E-PM* | 118 IN, 136 IN,159 IN, or 159 IN Ext. | 90 IN (Low) or 101 IN (High) | Rotation | Rotation | 166 lbs | Overview Assembly |
*Three crossbar rack
Crossbar spacing and the vehicle’s wheelbase length will dictate the ladders that can be carried. Crossbars can be spaced at six, seven, or eight feet. A third crossbar can be spaced four, five, six, or seven feet. If carrying a long extension ladder and a short step ladder, a three crossbar rack is suggested. Contact Prime Design customer service for application specific questions. Check the vehicle manufacturer’s recommendation for roof capacity weight limits. A wide range of accessories are available including conduit carriers, lighting mounts, and more.
Van Crossbar Spacing and Ladder Size Guide
| Crossbar Spacing | Step Ladder Sizes | Extension Ladder Sizes |
| 4 ft spacing | 6 – 8 ft. | 16 – 20 ft. |
| 5 ft spacing | 8 – 10 ft. | 16 – 24 ft. |
| 6 ft spacing | 8 – 12 ft.** | 16 – 28 ft. |
| 7 ft spacing | 10 – 12 ft.** | 20 – 32 ft. |
| 8 ft spacing | 10 – 12 ft.** | 20 – 36 ft. |
**12 ft. step ladders may require an extended upper add-on component
