3M DBI-Sala 8510457 Advanced Manhole Collar Davit Base, 1 Each

3M DBI-Sala 8510457 Advanced Manhole Collar Davit Base - 1 Each

The 3M DBI-Sala 8510457 Advanced Manhole Collar Davit Base is a portable, corrosion-resistant aluminum confined space access base designed to support davit mast installation in manhole openings measuring 22 to 24 inches (55.8 to 60.9 cm) in diameter. Featuring durable welded aluminum construction, a protective PVC davit mast sleeve liner, integrated carrying handles, and tool-free setup and dismantling, this manhole collar base provides convenient transport, efficient installation, and smooth davit mast positioning for confined space entry and retrieval operations. Compared with conventional fixed mounting arrangements, its portable, lightweight design simplifies equipment positioning, reduces setup time, and offers greater flexibility for maintenance, inspection, utility access, and emergency rescue applications involving underground vaults, sewer systems, and industrial manholes, helping improve worker safety and operational efficiency. This product is listed to OSHA 1910.66 requirements and should be used as part of a properly configured confined space entry and retrieval system in accordance with applicable fall protection regulations and manufacturer instructions.