Joist hangers are designed to provide support underneath the timber
beam, joist or rafter to provide a strong connection, to resist
downward force and to provide structural stability. Joist hangers are
made of pre-galvanised mild steel, but can also be ordered from
stainless steel. Depending on the load and and the type of the joist,
the joist hanger made from galvanised steel thickness 0.8mm to 3.0mm or
more.
Some joist hangers would work with masonry
walls. The joist hanger will keep your joists solidly and permanently
connected. If you install them properly, joist hangers will keep your
decks and floors strong as wood dries, twists, shrinks and ages.
Joist
hangers come in many sizes to support different cross dimensional sizes
of timber joists. The galvanized coating would allow the hanger to be
used outdoors. Most joist hangers are common face-mounting type, and
there are specialized hangers available for joists that run at an
angle. Joist hangers speeds up your construction time, so they are a
real bargain.
Wood to wood Joist Hangers
Face
fixed joist hangers are provided with fixing holes to allow you to fix
them to the face of the beam or wall. Some have longer legs that can be
bent over or wrapped over the beam or the wall. These legs allow fixing
from the top giving extra support. Face fixed joist hangers can be light
duty or heavy duty.

Masonry Joist Hangers
Masonry
joist hangers are usually welded for strength. They are designed to be
placed either on top of a wall, or wrapped around the wall or fixed into
a joint in the wall. The return adds additional lateral support by
wrapping around the back of the masonry.

Saddle Joist Hangers
Welded
Saddle hangers are designed to hang over both sides of a beam, joist or
a wall in order to continue a joist line in the same direction.

Note:
- Choose the correct hanger that fits the joist. Do not use a larger hanger than the size of the joist.
- Fill
all the holes in each joist hanger with the proper size nail. If the
wrong nails are used at a joist hanger, it won't perform as intended. Nails matter. Don't use drywall screws to install joist hangers, as they don't have the toughness to support joist loads.