| Primitive
forms of neoprene hangers (HD), spring hangers (HS) and
combination spring and neoprene hangers (DNHS) were around
before 1958, but we improved them all as we established
our standards. Our most sophisticated design is the 30N,
which uses a spring series even larger in diameter than
those used for the SLF mountings. This enables us to enlarge
the hole in the bottom of the hanger box so the suspension
rods can swing through a full 30 degree arc, virtually eliminating
the age-old problem of hanger rods rubbing against the holes
in the hanger boxes and short-circuiting the system. We
use neoprene bottom cups for the springs, molded with rubber
hole bushings as an added precaution. All spring hangers
can be furnished precompressed with a loading scale for
simplified adjustment and load verification in the field,
as well as acoustical ceiling installation. Special hangers
are manufactured for pipe expansion problems. |
