ASME B30.23 prohibits using which for suspension systems?

• A. Synthetic fiber rope
• B. Chain sling
• C. Synthetic web bridle
• D. Wire rope sling

Answer: (C)

Suspension systems require sling materials that can handle dynamic hoisting loads and protect the load from edges and abrasion over long periods. Synthetic web bridle slings are sewn fabric straps, and their strength comes from stitching and the fabric itself. Under the repeated shocks and edge contact typical of suspended platforms, these webbing bridles are more prone to fraying, cutting, and stitching failure, and they can creep or degrade with heat and sunlight. Because of these vulnerabilities, ASME B30.23 prohibits using synthetic web bridle slings for suspension systems. The other options—wire rope slings and chain slings—are built to resist sharper edges and higher shock loads when used with proper edge protection and fittings, making them acceptable choices under the standard when used correctly.