3M DBI SALA Galvanised Deck Mount HC Davit Base 8000099Use 3M DBI SALA Confined Space HC (High Capacity) Deck Mount Base (galvanised steel) with 3M DBI SALA HC Davit Masts for a confined space, rescue and work support system. The Deck Mount Base is constructed of mild steel and coated using a hot dipped galvanisation process which provides corrosion protection against the elements and is silver in appearance. It's designed to be installed through and clamp to flooring ranging in thickness from 13 mm (0.