Shot-form is generally applied
directly to rebar mats or frames when these can be shot
from both sides. These frames can be formed and shaped
into the approximate desired shape of the finished wall.
To this formwork or grid the contractor ties Shot-form
sheets to cover the entire surface that will be sprayed
with shotcrete. In most cases the concrete is shot onto
the surface of the reinforcing steel and stopped by the
Shot-form that has been applied to the back of the rebar
mat. The goal here is to fully embed the reinforcing steel.
Many times a second application of concrete is sprayed
to the backside of the Shot-form as a subsequent operation.
This produces a wall equal to the total thickness of both
Some installations allow for concrete applications
to only one side of the Shot-form. In these applications,
spacers such as high chairs are used to space the Shot-form
the required distance from the rebar mat. Once the reinforcing
steel is in place, the shotcrete application can begin.
The Shot-form is often placed against grade
for this application, and since it does not have to be
stripped it simply stays in place and can be fully covered,
Section: Applications >