Water Weight Bag UV Resistant Material Puncture Abrasion Resistant

Water Weight Bags are specialized load-testing devices engineered for verifying the safe working load of lifting equipment, cranes, davits, hoists, and deck structures. Constructed from high-strength PVC or TPU composite fabrics, these bags are designed to be filled with water at the testing site, providing gradually controllable load increases.

Compared with conventional steel weights, Water Weight Bags allow operators to simulate operational loads under real conditions while maintaining full control over filling rates. The lightweight nature when empty reduces storage volume by more than 80% and enables deployment in remote locations or restricted decks where transporting metallic weights is impractical.

In 2024, a shipyard in Singapore undertook a comprehensive load-testing program for a newly installed 40-ton gantry crane used for block lifting during vessel repair cycles. Traditional dead weights were ruled out due to deck loading restrictions and the difficulty of bringing large steel masses into the dock area.

A configuration of four 10-ton bags was used, each attached with certified slings to the crane hook assembly. The gradual filling allowed the test team to monitor crane deflection and structural alignment at 10%, 25%, 50%, and full load stages.

• Precision Controlled Incremental Loading: Operators can adjust water input rate through calibrated valves, enabling load steps as fine as 1% of total capacity.
• High Strength Fabric Architecture: Advanced composite fabrics with polyester reinforcement and dual-sided PVC or TPU coatings.
• Optimized Rigging System: Reinforced lifting mechanism designed to distribute load evenly across the structure.
• Efficient Deployment: Collapsible nature makes handling exceptionally efficient with reduced storage volume.

• Crane and Hoist Proof Loading: Verifying safe working load of deck cranes, mobile cranes, and hoist systems.
• Lifeboat Davit and Winch Testing: Providing optimal load simulation for marine safety regulation tests.
• Deck Load and Structural Integrity Verification: Assessing deck strength and platform integrity under distributed weight.