RM3-900G/48 3-Person Round Crane Man Basket
Product Description
The RM3-900G/48 is a three-occupant crane-suspended personnel platform designed for crew-based inspection, maintenance, and construction work on cylindrical and curved structures such as towers, tanks, stacks, and silos. Its 48″ round footprint offers a spacious, efficient workspace that allows crews to position around curved equipment with 360-degree access and no corner interference.
Built to meet or exceed OSHA 1926.1431 requirements for hoisting personnel, the RM3-900G/48 features a heavy-gauge round tubular steel frame, 42″ guardrails with 6″ toeboards, and perforated steel sides from toeboard to mid-rail, along with a dedicated base-attached suspension system that minimizes tipping. A four-leg 1/2″ 6×36 IWRC wire rope sling assembly connects to the platform base, and a grab rail inside the entire perimeter provides personal fall arrest anchorage in compliance with OSHA 1926.502. The 900 lb rated capacity is sized for a three-person crew with tools and PPE, while the 430 lb basket weight keeps the total suspended load compatible with many project cranes.
Like all Lifting Technologies Premier round man baskets, the RM3-900G/48 is manufactured in Missoula, Montana, and ships as a turnkey package complete with the sling assembly, a safety leg for tie-off to the load line above the overhaul ball, and Lifting Technologies’ unique easy-on/easy-off detachable test weight system. Each unit is proof-load tested at 1,125 lb—125% of its 900 lb rated capacity—before leaving the facility, and ships with proof-load certificates, inspection checklists, access to Lifting Technologies online video training, and operator guidelines to support site safety and regulatory compliance.
The RM3-900G/48 is widely used in power generation, petrochemical, and construction settings where three-person crews must work together at height around cylindrical equipment. Its round footprint and crew-sized rating make it ideal for tasks such as stack inspections, column externals work, and curved structural jobs where square or rectangular platforms are more difficult to align with the work surface.
Industrial Applications
Power Generation & Utilities
Power generation facilities rely on personnel platforms for access to stacks, towers, tanks, and curved duct sections where work follows circular or irregular profiles. The RM3-900G/48’s 48″ round platform and 900 lb capacity support three-person crews performing stack inspections, curved duct repairs, and tower-related maintenance where full-circle access around the structure improves efficiency.
Crews can rotate the basket around cylindrical structures to position workers and tools as needed along the circumference while sharing a stable, three-person round work area.
Petrochemical & Refining
Refineries and petrochemical plants use round personnel platforms for vessel and column work, including tray inspections, nozzle repairs, and external shell inspections on tall cylindrical equipment. The RM3-900G/48 enables three-person crews to conduct column externals inspections, localized repairs, and nozzle or manway work on large vessels and towers, where the round footprint follows the curvature of the equipment.
The 48″ diameter deck provides sufficient space for three technicians with inspection tools, light repair equipment, and small components while simplifying positioning around curved shells and tight-radius areas in congested process units.
Construction & Structural
Construction projects involving circular or curved structures—silos, tanks, chimneys, towers, and curved architectural elements—benefit from round man baskets for welding, inspection, and finishing tasks. The RM3-900G/48 provides a three-person round platform that allows crews to follow curved faces, inspect welds, and perform sealing or finishing along circular edges and transitions.
The round outline helps the basket clear surrounding steel and bracing while allowing crews to work in multiple positions around the structure from a single lift, improving productivity on curved structural work.
Features & Benefits
Three-Person Round Work Platform: The 48″ round deck offers a generous, efficient workspace for three workers plus tools and materials, enabling 360-degree access around cylindrical and curved structures in demanding industrial environments.
Optimized for Towers, Tanks, and Columns: The round footprint eliminates corners that can interfere with circular shells and curved work faces, making the RM3-900G/48 ideal for stacks, tanks, columns, and similar structures where alignment around the curvature is critical.
OSHA-Compliant Premier Construction: Built to comply with OSHA 1926.1431, the RM3-900G/48 includes a dedicated base-attached suspension system that minimizes tipping, 42″ guardrails, 6″ toeboards, perforated side panels from toeboard to mid-rail, an optional access gate with positive restraining device, and a perimeter grab rail providing fall arrest anchorage in compliance with OSHA 1926.502.
Proof Load Tested to 1,125 lb: Each RM3-900G/48 is proof-load tested at 1,125 lb (125% of its 900 lb rated capacity) before shipment and ships with Lifting Technologies’ detachable test weight system, proof-load certificates, and inspection documentation for safety and audit readiness.
Robust Yet Efficient Weight-to-Capacity Ratio: With a 430 lb basket weight and a 900 lb capacity, the RM3-900G/48 maintains a favorable weight-to-capacity ratio that keeps total suspended load manageable while delivering robust structural performance for three-person work scopes.
Frequently Asked Questions
What OSHA regulations apply to the RM3-900G/48?
OSHA 1926.1431 governs the use of crane-suspended personnel platforms in construction, detailing requirements for proof-load testing, guardrail and toeboard dimensions, fall protection anchor points, and inspection procedures. The RM3-900G/48 is designed and documented to help users comply with these standards.
How much weight can the RM3-900G/48 hold?
The RM3-900G/48 has a maximum rated capacity of 900 lb, which includes the combined weight of all three occupants plus tools, materials, and personal protective equipment. With a basket weight of 430 lb, the total suspended load is approximately 1,330 lb, excluding rigging; each unit is proof-load tested at 1,125 lb (125% of capacity) before shipment.
How many people can work in the RM3-900G/48?
The RM3-900G/48 is rated for three occupants. Lift planning should allocate the 900 lb capacity across three workers and their equipment, using conservative per-person weight allocations so that total crew, tools, and PPE remain within the rated load.
When should the RM3-900G/48 be used instead of RM2-600G/38 or RM4-1200G/60?
Choose the RM3-900G/48 when tasks require a three-person crew and more space than the RM2-600G/38 provides, but a full four-person basket is not needed. RM2-600G/38 is better suited for smaller two-person jobs on curved structures, while RM4-1200G/60 is ideal for full crews and heavier workloads around large-diameter equipment.
Can the RM3-900G/48 be customized?
Yes. Lifting Technologies can customize the RM3-900G/48 with options such as an inward-opening access gate with positive restraining device, additional tool or material trays, specific rigging configurations, additional fall protection anchor points, and custom paint colors or markings for site identification. Overhead protection can be added by moving to the RM3-900S/48 model.
What documentation comes with the RM3-900G/48?
Each RM3-900G/48 ships with proof-load test certification, operator guidelines, pre-use inspection checklists, access to Lifting Technologies online video training, and detailed product specifications. Additional documentation and training resources are available to support regulatory compliance, safety programs, and crew training.
Find Out More
For a smaller 2-person round platform, see the RM2-600G/38. For a larger 4-person round platform, see the RM4-1200G/60. For overhead-protection versions, see the RM3-900S/48 and other S-series round models. For an overview of Premier round crane man baskets and OSHA guidance, visit the Premier Man Basket (Round) page and the Crane Man Basket OSHA Regulations page.