EARTHQUAKE DAMAGED CHIMNEYS
When using an RIS chimney to repair a damaged masonry chimney it is important to note that ICC is not in a posi-
tion to determine the condition of the existing masonry. The assessment of the existing structure and determina-
tion of the correct repair procedure is beyond the scope of these instructions. In some cases a proper damage
assessment will require an on site evaluation by a professional engineer.
Because of the uncertainty related to
the existing structure earthquake damage repairs should only be completed by knowledgable, experi-
enced contractors.
RIS chimneys have been specifically designed, tested and listed to vent masonry fireplaces in residential installa-
tions and to extend existing masonry chimneys. One of the primary applications of RIS is for the repair of earth-
quake damaged masonry fireplaces and chimneys. ICC provides components designed to correctly adapt our
products to existing masonry construction and we warranty the performance and mechanical integrity of our sys-
tem
when it is correctly installed on a structurally sound foundation.
LOCAL REQUIREMENTS
The requirements for chimney repair vary substantially from jurisdiction to jurisdiction. We strongly recommend
that you contact your local building officials to determine the requirements in your particular area before attempt-
ing any chimney repairs. Some municipalities (e.g.: The City Of Los Angeles) have specific written repair require-
ments - most other areas are not as specific. Two sources of information concerning the construction and inspec-
tion of masonry chimneys and fireplaces are "The Residential Fireplace and Chimney Handbook" written by the
Masonry Institute of America and "Repair Of Earthquake Damaged Masonry Chimneys Using New Metal
Chimneys" by the City of Los Angeles Department of Building and Safety.
INSTALLATION INSTRUCTIONS
CHIMNEY LENGTHS (RIL)
Install chimney lengths as follows:
1. Stack one chimney length on to another.
2. Screw the stainless steel metal screws supplied with the length through the pre-punched holes in the bottom
of the length and into the lower length. Be sure to use a metal screw in each pre-punched hole. Continue until
the required chimney height is achieved.
3. In some installations it is difficult to install all of the screws in the pre-punched holes (eg: when the chimney is
run parallel to a wall at minimum clearance). In these installations it is possible to install a locking band how-
ever the use of a locking band does not totally elimnate the requiremet for screws. You should install as many
screws as possible (the screws do not all need to be in the pre-punched holes) and you must install at least
half of the screws.
ADJUSTABLE LENGTH (RILA)
The adjustable length is to allow the chimney to fit in a fixed distance when a suitable standard length is not
available. Typical applications are between two elbows when a fixed offset distance is required or between two
boiler outlet flanges which are a fixed distance apart.
The length of the outer casing of the adjustable length must be set before it is installed. The adjustable length is
installed by sliding the flue (inner stainless steel) into the section below it after the two piece outer casing has been
adjusted to the correct overall length. The adjustable length should be installed with a straight chimney section
below it, there is not sufficient room for it to adjust into a tee or elbow.
1. Measure the exact length required, be sure to allow for the overlap between chimney sections.
2. Slide the two piece outer casing together until the correct overall length is achieved.
RIS Owner's Manual
ICC Chimney
7
