21.50 INCH ADVANCED STRINGING BLOCKS
A versatile new stringing block that replaces multiple existing blocks for stringing, bends, pulling, underground, drone, and helicopter applications. It offers significant weight savings over traditional sheaves, blocks, and radius blocks—and is the world's first true radius block.
Key Features
1. Replaces traditional series of wheel and radius blocks
2. Non-conductive outer shell on 21.5 and 33.5 inch blocks
3. More than 50% lighter than traditional blocks
4. Will pull at 90 degree angles
5. Use a hot stick to open and close spring loaded gate
6. 2 inch roller capacity
Added Benefits
• Reduced fatigue / injury risk
• Better for distribution & tight-access work
• Crossarm-mounted stringing
• Tight urban or distribution environments
• Complex angles and limited access
PART NUMBER | DESCRIPTION | WEIGHT |
80100 | 21.5” Advanced Stringing Block | 14.5 lbs. |
80107 | Light duty Nonconductive Plastic Arm For Drone Stringing Operations | 1 lb. |
80108 | Heavy Duty Aluminum Arm For Drone and Helicopter Stringing Operations | 1.6 lbs. |
80111 | Short Base Mount - 10.625 inches tall - 2500 lbs. WLL | 16 lbs. |
80104 | Tall Base Mount – 12.625 inches tall - 2500 lbs. WLL | 21 lbs. |
80110 | Kick Stand | 10 lbs. |
21.50” ADVANCED STRINGING BLOCK | |
Width | 18.5 in |
Height | 13 in |
Depth | 6.5 in |
Weight | 14.5 lbs. |
Cable Opening | 3 in |
Roller Capacity | 2 in |
Hanging WLL | 12k lbs. |
Efficiency and Innovation
Designed specifically for stringing advanced conductors using drones or helicopters, the GMP Advanced Stringing Block (ASB) is the first stringing block engineered to provide a large radius over the top of a utility crossarm while maintaining a compact, low-profile design. Its non-conductive fly arm and spring-loaded gate allow the pull line to be easily guided into position, improving installation efficiency and simplifying conductor placement. The ASB represents a significant advancement in stringing technology, helping utilities modernize and upgrade electrical circuits more effectively.
Durable, High-Quality Construction
Built from premium materials, the ASB delivers exceptional strength while remaining lightweight and non-conductive, supporting compliance with OSHA 1910.269 requirements. The block frame is precision-machined from 6061 billet aluminum, while the roller-support wings are enclosed in high-density polyethylene (HDPE) for added durability and insulation. Delrin inner rollers protect conductors from damage during installation, ensuring reliable performance in the field.
Versatile and Adaptable Design
The ASB features a new pivoting base design that provides flexibility across a wide range of applications. It can be quickly attached to crossarms or poles and configured to accommodate varying pull angles and challenging installation conditions. Multiple mounting configurations enable the ASB to adapt to unique field requirements, and both Distribution and Transmission models are available to meet specific project needs.
Enhanced Safety and Cost Efficiency
The ASB's lightweight, non-conductive design helps reduce the risk of arc-flash-related injuries while minimizing worker fatigue, strain, and sprain injuries associated with equipment handling. By streamlining installation processes and improving crew productivity, the ASB delivers both safety and economic benefits. Its innovative design provides the utility industry with a safer, more efficient solution for conductor stringing operations.
US Patent # 10,998,700
US Patent # 10,763,648
US Patent # 11,476,596
US Patent # 11,942,238