Caldwell Model ALG Adjustable Lifting Grab for Concrete Barriers

The Caldwell Model ALG Adjustable Lifting Grab is designed for safely lifting, transporting, and positioning concrete barriers, jersey barriers, retaining wall sections, and precast concrete products in demanding construction environments.

Built for high-cycle industrial use, the ALG series features adjustable gripping widths, automatic latching, replaceable gripping pads, and rugged steel construction for reliable barrier handling on infrastructure and highway projects.

Manufactured to meet ASME B30.20 and BTH-1 Service Class 3 requirements, the ALG lifting grab helps contractors improve lifting safety, reduce manual positioning, and increase jobsite efficiency when handling heavy concrete products.

Features

• Heavy-duty lifting grab for concrete barriers and precast products
• Infinitely adjustable within operating range
• Stainless steel adjustable auto-latch system
• Locating assembly automatically aligns grab positioning
• Replaceable polyurethane gripping pads
• Optional hardened alloy “Dog Point” gripping pads available
• Extended operator handles improve worker safety
• Adjustable handle positioning
• Color-coded decals show remaining adjustment travel
• Position-indicating decals simplify setup
• Self-centering lifting eye
• Fork handling compatible
• Designed for high-cycle construction applications
• Built to ASME B30.20 and BTH-1 standards

Common Applications

• Jersey barrier lifting
• Highway barrier installation
• Concrete barrier handling
• Precast concrete placement
• Infrastructure construction
• DOT construction projects
• Utility and roadway projects
• Heavy concrete product lifting

Specifications

Adjustable Barrier Handling System

The ALG series is designed to provide secure gripping and safer lifting for a wide range of barrier sizes. The infinitely adjustable configuration allows operators to quickly adapt the grab for different concrete barrier widths while maintaining proper load engagement.

The integrated locating assembly helps automatically orient the grab during lifting operations, reducing the need for manual adjustment and improving operator efficiency.

Replaceable Gripping Pads

Standard polyurethane gripping pads help protect concrete surfaces from chipping, scratching, and cosmetic damage during lifting operations.

Optional hardened alloy steel “Dog Point” pads are available for painted or coated barriers where additional grip is required. These pads are commonly used in coastal regions and infrastructure applications where barriers are painted for corrosion resistance or identification.

Improved Operator Safety

Extended operator handles help keep workers away from suspended loads during positioning and removal. Adjustable handle positioning allows the grab to be configured for different lifting conditions and barrier sizes.

Color-coded travel decals and position indicators simplify adjustment setup and help ensure proper grab engagement before lifting.

Durable Construction for High-Cycle Use

The Caldwell ALG Adjustable Lifting Grab is engineered for rugged, repetitive lifting operations in demanding jobsite conditions. Heavy-duty steel construction and industrial-grade components help provide long service life in highway construction, bridge work, utility projects, and precast operations.

Compliance Standards

• ASME B30.20
• BTH-1
• Service Class 3

Operating Overview

1. Position the lifting grab over the concrete barrier
2. Lower the crane or lifting device to engage the auto-latch
3. Lift and transport the barrier
4. Position the barrier into place
5. Lower and release tension
6. Remove the lifting grab safely

Additional Product Information

Self-Centering Lifting Eye

The integrated lifting eye helps maintain balanced lifting and simplifies crane hook attachment during operation.

Fork Compatible Design

The ALG lifting grab can also be moved and positioned using forklifts for improved jobsite handling flexibility.

High Visibility Adjustment Indicators

Integrated decals help operators quickly identify remaining adjustment travel and verify proper setup before lifting.

Technical & Catalog Information

Construction & Design Details

The ALG series is featured within Caldwell’s Construction Lifters and Barrier Grab product catalogs, which outline the following additional information:

• Barrier grab dimensional layouts
• Engineering illustrations
• Load positioning diagrams
• Adjustable operating ranges
• Recommended lifting practices
• Product configuration references
• Safety and inspection guidelines
• Rigging compatibility details
• Material and component information
• Service class information
• Maintenance recommendations

Catalog-Based Product Highlights

Additional catalog documentation identifies the ALG series as suitable for:

• Continuous heavy-duty lifting cycles
• Highway precast barrier placement
• Fast-paced infrastructure installation
• Contractor fleet lifting operations
• DOT and municipal construction applications

The catalog materials also reinforce the importance of proper load balancing, pad inspection, and correct lifting engagement during operation.