Heavy-Duty A-Shaped Crane for Industrial Applications and Safety

A-shaped Floating Crane Product Introduction

(1) Specifications and Product Parameters

The A-Frame Floating Crane is a barge-mounted heavy-lift platform optimised for stability in offshore and nearshore environments, featuring a fixed gantry for synchronised boom operations. Key specifications: overall length (LOA) 60-100 m; beam 25-40 m; moulded draft 4-6 m; displacement 5,000-15,000 tonnes. Safe working load (SWL) 500-3,000 tonnes at 15-40 m radius, with outreach up to 50-80 m and luffing range 20-80 degrees. Hoisting speeds: 0.5-2 m/min under full load, 5-10 m/min light hook; powered by redundant diesel-electric generators (4,000-8,000 kW total) with variable frequency drives (VFD) for torque control. Ballast system capacity 8,000-15,000 m³ with anti-heeling pumps rated at 1,000 m³/h; hook elevation 70 m above mean sea level (MSL). Classed under CCS for coastal/offshore notations.

(2) Product Features, Performance, and Materials

Incorporates a structural A-frame with pinned connections for dual-boom articulation, supporting tandem lifts via synchronised hydraulic rams with ±0.1° alignment precision. Performance metrics: passive heave compensation via constant tension winches, achieving ±1 m vertical stability in significant wave heights (Hs) up to 2.5 m; dynamic load factor (DLF) <1.3 per API RP 2A. Overload protection through strain gauge-based load cells with 0.1% accuracy, triggering auto-shutdown at 110% SWL; emission abatement via SCR/EGR systems compliant with IMO Tier III (NOx <3.4 g/kWh). Optional electro-hydraulic drives with regenerative braking yield 15-25% energy recovery, reducing operational noise to <85 dB(A) at 1 m. Primary materials: AH36/DH36 high-yield steel (σ_y >345 MPa) for hull and frame, with finite element analysis (FEA)-optimised scantlings; duplex 2205 stainless steel for sheaves and hydraulic lines resisting chloride stress corrosion; advanced composites (e.g., CFRP) for non-structural fairleads. Control systems feature redundant PLCs (IEC 61131), HMI touchscreens, integrated GPS/INS for positional accuracy <1 m, and API 2C-compliant fatigue-life monitoring via acoustic emission sensors.

(3) Product Actual Application Ranges/Scenarios

Engineered for deployment in transitional water depths (5-100 m) under IMCA D 016 guidelines, excelling in port infrastructure erection such as precast segmental bridge assembly and caisson immersion with metocean tolerances up to Beaufort force 5 (Hs 2 m, wind 20 knots). Facilitates marine salvage per IMO Resolution A.949(23), including subsea debris clearance and vessel righting via controlled tandem lifts in currents up to 2 knots. Adaptable to renewable energy projects, such as offshore wind jacket piling and substation module installation compliant with IEC 61400-3, in significant wave periods (Tp) 8-12 s. Supports dredging logistics by transloading spoils to hopper barges in estuarine environments and by providing temporary heavy-lift in inland waterways for lock gate maintenance or pipeline crossings. Ensures operational integrity across global domains through ISM Code adherence, flag-state surveys, and risk-based inspections per the ABS Guide for Floating Installations.