Quality Control Procedures Required for Plant Certification
CSI plant certification shall not be construed as conferring or creating any claim, right, or remedy
in customers/clients of the CSI member/producer, the general public, or any other third party nor creating
any duty by CSI or the member/producer to customers/clients of the member/producer, the general public,
or any other party.
The CSI plant certification program is not intended to and does not certify or warrant products of a
CSI member/producer in any manner whatsoever.
The Cast Stone Institute has a commitment to establish a standard of quality that will be recognized and
respected by the general public. Cast Stone Institute producer members must be able to attain that standard
on a consistent basis.
The plant inspector should determine each of the following items. Each section will be graded according
to percentage of compliance. All mandatory items must be in place and the average percentage of compliance
for all sections must exceed 80% to qualify for producer membership. Continuing members should exceed 90%
compliance with these items, plus 100% of the mandatory items.
M - Mandatory 100%
P - Primary 90%
Successful CSI Plant Certification will take place only if the plant obtains the following:
1. 100% of all the Mandatory items.
2. 90% of the Primary items.
The following are identified and maintained:
Current Member Criteria:
Each Producer Member must submit
testing records to the Institute office between March 1st and March
15th, and also between September 1st and September 15th of each year
in order to maintain plant certification.
This submission shall include:
1. The last 60 days of 500 CF test
data for both compressive strength and absorption, tested in
accordance with ASTM C1194-19 and ASTM C1195-19a.
2. A current (within the last six months) Independent Lab test,
meeting the physical requirements set forth in ASTM C1364-19 for both
compressive strength and absorption, tested in accordance with ASTM
C1194-19 and ASTM C1195-19a.
If multiple deficiencies are found in
the submitted data, the member will be placed on a quality audit
list and required to submit monthly samples to the testing
laboratory contracted with the Cast Stone Institute for a period of
six months, and the results will be sent to the Institute office for
review. The expense of this testing will be the responsibility of
New Member Criteria:
In order to qualify Producer
Membership, the following records must be submitted to the Institute
office along with membership application.
1. Current Independent Lab test
(within the last 6 months) indicating applicants ability to
manufacture cast stone that meets the requirements set forth
in ASTM C1364-19, when tested in accordance with ASTM C1194-19 and ASTM
2. The last six months of 500 CF test data from in house or independent lab testing for both compressive
strength and absorption requirements set forth in ASTM C1364-19 and tested in accordance with ASTM C1194-19 and
ASTM C1195-19a in house or independent lab reports.
3. A current (within the last year)
passing Freeze/Thaw test, tested in accordance with ASTM C666 as modified by ASTM C1364-19. Freeze/Thaw test to be performed by the lab contracted by the Cast Stone Institute.