Consider how rickety many shelves become after we move them. Since special librarians acquire many of their furnishings from various sources throughout their host institutions, special libraries are more likely to contain shelving collapse. B.C. The technical reference collection is housed in standard particle board units moored to the wall. The circulating book stock is kept in ranges of heavily-braced commercial shelving that could support the weight of the entire collection, case shelving that once held a collection of fossils from the Burgess Shale, and old bracket shelving that might have been to sea in another incarnation. Such a collapse does not seem stable, but the engineers who use the collection inspect the shelving regularly to make sure that it poses no risk.
Repairs are quick.
This non-system is not ideal, but it does its job inexpensively, efficiently and safely. A shelving risk analysis begins with an inventory of all shelving on the library site. A self-contained unit can stand on its own without support from another structure. The kinds of shelving on the site. This section includes a description of the shelves in all public and workroom areas, as well as the old storage collage in the basement, and the wall-mounted shelves for cleaning supplies in the janitor's closet.